*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --white: #ffffff;
    --ink: #111010;
    --ink-faint: #c0bbb0;
    --ink-mid: #7a756a;
    --dot-off: #e8e4dc;
    --dot-on: #8a7f6f;
    --bar-height: 44px;
}

html,
body {
    height: 100%;
}

body {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    background-color: var(--white);
    color: var(--ink);
    font-family: "EB Garamond", Georgia, serif;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 180px 180px;
    pointer-events: none;
    z-index: 0;
    opacity: 0.5;
}

.nav-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: env(safe-area-inset-top, 0px) 2rem 0;
    height: calc(var(--bar-height) + env(safe-area-inset-top, 0px));
    background-color: var(--white);
}

.nav-back {
    justify-self: start;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    font-weight: 300;
    letter-spacing: 0.2em;
    color: var(--ink-mid);
    text-decoration: none;
    transition: color 0.2s ease;
}
.nav-back:hover {
    color: var(--ink);
}

.nav-title-row {
    justify-self: center;
    display: flex;
    align-items: center;
    gap: 0.7rem;
}
.nav-title-row[hidden] {
    display: none;
}
.nav-title-line {
    width: 26px;
    height: 1px;
    background: var(--dot-off);
}
.nav-title-text {
    font-family: "EB Garamond", Georgia, serif;
    font-style: italic;
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--ink);
    white-space: nowrap;
}

.nav-right-group {
    justify-self: end;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.nav-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    background: none;
    border: none;
    color: var(--ink-mid);
    font-size: 0.75rem;
    cursor: pointer;
}
.nav-icon-btn:hover {
    color: var(--ink);
}

.stage {
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 1.5rem;
    min-height: 0;
}

.signin-gate {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.4rem;
    text-align: center;
    opacity: 0;
    transform: translateY(12px);
    animation: fadeUp 1s cubic-bezier(0.22, 1, 0.36, 1) 0.15s forwards;
}
.signin-gate[hidden] {
    display: none;
}

.encryption-gate {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    text-align: center;
    max-width: 380px;
    opacity: 0;
    transform: translateY(12px);
    animation: fadeUp 1s cubic-bezier(0.22, 1, 0.36, 1) 0.15s forwards;
}
.encryption-gate[hidden] {
    display: none;
}
.encryption-gate-desc {
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--ink-mid);
}
.encryption-passphrase-input {
    width: 100%;
    padding: 0.65rem 0.9rem;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 999px;
    font-family: "DM Mono", monospace;
    font-size: 0.8rem;
    color: var(--ink);
    text-align: center;
}
.encryption-passphrase-input:focus {
    outline: none;
    border-color: var(--ink-mid);
}

.passphrase-strength {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}
.passphrase-strength-bar {
    flex: 1;
    height: 4px;
    background: var(--dot-off);
    border-radius: 999px;
    overflow: hidden;
}
.passphrase-strength-fill {
    height: 100%;
    width: 0%;
    border-radius: 999px;
    transition: width 0.2s ease, background-color 0.2s ease;
}
.passphrase-strength-label {
    font-family: "DM Mono", monospace;
    font-size: 0.55rem;
    color: var(--ink-faint);
    white-space: nowrap;
}
.passphrase-generate-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    width: 100%;
    padding: 0.5rem;
    background: none;
    border: 1px dashed var(--dot-off);
    border-radius: 999px;
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    color: var(--ink-mid);
    cursor: pointer;
}
.passphrase-generate-btn:hover {
    border-color: var(--ink-mid);
    color: var(--ink);
}
.recovery-key-display {
    width: 100%;
    padding: 1rem;
    background: var(--dot-off);
    border-radius: 10px;
    font-family: "DM Mono", monospace;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    color: var(--ink);
    text-align: center;
    word-break: break-all;
    line-height: 1.8;
    user-select: all;
}
.encryption-gate-warning {
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    line-height: 1.6;
    color: var(--ink-faint);
    max-width: 320px;
}

.encryption-gate-cancel-btn {
    background: none;
    border: none;
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    color: var(--ink-faint);
    text-decoration: underline;
    cursor: pointer;
    padding: 0.2rem;
}
.encryption-gate-cancel-btn:hover {
    color: var(--ink-mid);
}
@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.gate-title {
    font-family: "EB Garamond", Georgia, serif;
    font-weight: 500;
    font-style: italic;
    font-size: clamp(1.4rem, 4vw, 2rem);
    color: var(--ink);
}

.quote-rule {
    width: 32px;
    height: 1px;
    background: var(--ink-faint);
    margin: 0 auto;
}

.identity-signin {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: none;
    border: 1px solid var(--dot-off);
    border-radius: 999px;
    padding: 0.6rem 1.2rem;
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    letter-spacing: 0.06em;
    color: var(--ink-mid);
    cursor: pointer;
    transition:
        border-color 0.2s ease,
        color 0.2s ease;
}
.identity-signin:hover {
    border-color: var(--ink-mid);
    color: var(--ink);
}

.signin-status {
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    color: var(--ink-mid);
    text-align: center;
    max-width: 320px;
}
.signin-status[hidden] {
    display: none;
}

/* ── Vista de lista de cadernos ── */
.notebook-list-view {
    width: 100%;
    max-width: 1080px;
    margin: 0 auto;
    padding: 1rem 0 2.5rem;
    opacity: 0;
    transform: translateY(12px);
    animation: fadeUp 1s cubic-bezier(0.22, 1, 0.36, 1) 0.15s forwards;
}
.notebook-list-view[hidden] {
    display: none;
}

.list-title {
    font-family: "EB Garamond", Georgia, serif;
    font-weight: 500;
    font-style: italic;
    font-size: clamp(1.5rem, 3.4vw, 2.1rem);
    color: var(--ink);
    margin-bottom: 1.6rem;
}

.list-toolbar {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 2rem;
}

.notebook-search-input {
    flex: 1;
    max-width: 340px;
    background: var(--dot-off);
    border: none;
    border-radius: 999px;
    padding: 0.55rem 1rem;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.9rem;
    color: var(--ink);
}
.notebook-search-input:focus {
    outline: 2px solid var(--ink-mid);
}

.new-notebook-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--ink);
    color: var(--white);
    border: none;
    border-radius: 999px;
    padding: 0.6rem 1.2rem;
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    letter-spacing: 0.05em;
    cursor: pointer;
    margin-left: auto;
    transition: opacity 0.15s ease;
}
.new-notebook-btn:hover {
    opacity: 0.85;
}

.list-subtitle {
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-mid);
    margin-bottom: 1rem;
}

.notebook-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.1rem;
}

.notebook-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 150px;
    padding: 1.1rem;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 14px;
    text-align: left;
    cursor: pointer;
    font-family: "EB Garamond", Georgia, serif;
    color: var(--ink);
    transition:
        border-color 0.2s ease,
        transform 0.2s ease;
}
.notebook-card:hover {
    border-color: var(--ink-mid);
    transform: translateY(-2px);
}

.notebook-card-new {
    align-items: center;
    justify-content: center;
    gap: 0.7rem;
    border-style: dashed;
    color: var(--ink-mid);
    font-size: 0.9rem;
}
.notebook-card-new-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--dot-off);
    color: var(--ink-mid);
    font-size: 0.85rem;
}

.notebook-card-title {
    font-size: 1.05rem;
    font-weight: 500;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.notebook-card-lock {
    font-size: 0.75rem;
    color: #4f7d4a;
}

.notebook-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.8rem;
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    letter-spacing: 0.03em;
    color: var(--ink-faint);
}

.notebook-card-delete {
    background: none;
    border: none;
    color: var(--ink-faint);
    cursor: pointer;
    font-size: 0.72rem;
    padding: 0.2rem;
    opacity: 0;
    transition: opacity 0.15s ease, color 0.15s ease;
}
.notebook-card:hover .notebook-card-delete {
    opacity: 1;
}
.notebook-card-delete:hover {
    color: #b03a3a;
}

.notebook-empty-note {
    font-family: "DM Mono", monospace;
    font-size: 0.68rem;
    color: var(--ink-faint);
    margin-top: 1.2rem;
}
.notebook-empty-note[hidden] {
    display: none;
}

/* ── Vista de um caderno individual ── */
.notebook-detail-view {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.notebook-detail-view[hidden] {
    display: none;
}

.detail-header {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 0.8rem;
    flex-shrink: 0;
}

.notebook-title-input {
    width: 100%;
    min-width: 0;
    background: none;
    border: none;
    font-family: "EB Garamond", Georgia, serif;
    font-style: italic;
    font-weight: 500;
    font-size: 1.3rem;
    color: var(--ink);
    padding: 0.2rem 0;
}
.notebook-title-input:focus {
    outline: none;
    border-bottom: 1px solid var(--dot-off);
}

.detail-meta-group {
    justify-self: end;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.detail-meta {
    text-align: right;
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    color: var(--ink-faint);
    white-space: nowrap;
}

.encryption-badge {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    font-family: "DM Mono", monospace;
    font-size: 0.55rem;
    letter-spacing: 0.02em;
    white-space: nowrap;
}
.encryption-badge.is-encrypted {
    background: #eef4ec;
    color: #4f7d4a;
}
.encryption-badge.is-standard {
    background: var(--dot-off);
    color: var(--ink-faint);
}

.notebook-columns {
    flex: 1;
    display: flex;
    gap: 1.2rem;
    min-height: 0;
}

.col-sources,
.col-chat,
.col-studio {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--dot-off);
    border-radius: 14px;
    overflow: hidden;
}

.col-header {
    flex-shrink: 0;
    padding: 0.7rem 1rem;
    background: var(--dot-off);
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-mid);
}

.col-placeholder {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    font-family: "EB Garamond", Georgia, serif;
    font-style: italic;
    font-size: 0.85rem;
    color: var(--ink-faint);
    text-align: center;
}

.footer {
    position: sticky;
    bottom: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem env(safe-area-inset-bottom, 0px);
    height: calc(var(--bar-height) + env(safe-area-inset-bottom, 0px));
    background-color: var(--white);
}

.footer-center {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    white-space: nowrap;
}

.footer-copy {
    font-family: "DM Mono", monospace;
    font-size: 0.55rem;
    font-weight: 300;
    letter-spacing: 0.15em;
    color: var(--ink-mid);
}

.footer-legal-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ink-mid);
    font-size: 0.7rem;
    text-decoration: none;
    opacity: 0.5;
    transition: opacity 0.2s ease;
}
.footer-legal-icon:hover {
    opacity: 1;
}

.footer-social {
    display: flex;
    align-items: center;
    gap: 1.1rem;
}

.footer-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ink-mid);
    font-size: 0.8rem;
    text-decoration: none;
    opacity: 0.5;
    transition: opacity 0.2s ease;
}
.footer-icon:hover {
    opacity: 1;
}

@media (max-width: 720px) {
    .stage {
        align-items: stretch;
        padding: 0;
        gap: 0;
    }
    .notebook-list-view {
        padding: 1rem 1rem 2.5rem;
    }
    .notebook-detail-view {
        gap: 0.6rem;
        padding-bottom: calc(56px + env(safe-area-inset-bottom, 0px));
    }
    .detail-header {
        padding: 0.6rem 1rem 0;
    }
    .notebook-columns {
        flex-direction: column;
        gap: 0;
        flex: 1;
        min-height: 0;
    }
    .col-sources,
    .col-chat,
    .col-studio {
        display: none;
        flex: 1;
        min-height: 0;
        padding: 0 1rem;
    }
    .col-sources.is-mobile-active,
    .col-chat.is-mobile-active,
    .col-studio.is-mobile-active {
        display: flex;
    }
    .mobile-tab-bar {
        display: flex;
    }
    .list-toolbar {
        flex-wrap: wrap;
    }
    .new-notebook-btn {
        margin-left: 0;
    }
    .source-toolbar {
        flex-wrap: wrap;
        row-gap: 0.5rem;
    }
    .studio-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
    .customize-modal {
        max-width: 100%;
        max-height: 92vh;
    }
    .cz-format-cards {
        grid-template-columns: 1fr;
    }
    .video-controls-row {
        gap: 0.7rem;
    }
    .mindmap-viewport {
        height: 320px;
    }
    .nb-chat-actions {
        opacity: 1;
    }
    .detail-meta-row {
        justify-content: space-between;
    }
}

.mobile-tab-bar {
    display: none;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 500;
    background: var(--white);
    border-top: 1px solid var(--dot-off);
    padding-bottom: env(safe-area-inset-bottom, 0px);
}
@media (max-width: 720px) {
    .mobile-tab-bar {
        display: flex;
        align-items: stretch;
    }
}
.mobile-tab-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    padding: 0.55rem 0.4rem;
    background: none;
    border: none;
    color: var(--ink-faint);
    font-family: "DM Mono", monospace;
    font-size: 0.55rem;
    letter-spacing: 0.02em;
    cursor: pointer;
}
.mobile-tab-btn i {
    font-size: 0.95rem;
}
.mobile-tab-btn.is-active {
    color: var(--ink);
}

@media (max-width: 480px) {
    .footer-center {
        display: none;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    .stats-grid .stats-card:last-child {
        grid-column: span 2;
    }
    .cz-style-carousel {
        gap: 0.5rem;
    }
    .datatable {
        font-size: 0.75rem;
    }
    .datatable th,
    .datatable td {
        padding: 0.4rem 0.5rem;
    }
}

/* ── Coluna de Fontes ── */
.col-add-btn {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: 0.8rem 1rem 0.6rem;
    padding: 0.55rem;
    background: var(--dot-off);
    border: none;
    border-radius: 999px;
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    letter-spacing: 0.04em;
    color: var(--ink-mid);
    cursor: pointer;
    transition: color 0.15s ease;
}
.col-add-btn:hover {
    color: var(--ink);
}

.source-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.source-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 0.6rem;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 10px;
    cursor: pointer;
}
.source-item:hover {
    border-color: var(--ink-mid);
}
.source-view-content {
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--ink);
    white-space: pre-wrap;
}

.source-pdf-embed {
    width: 100%;
    height: 70vh;
    border: none;
    border-radius: 8px;
}

.source-view-note {
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    color: var(--ink-faint);
    margin-bottom: 1rem;
    padding: 0.6rem 0.8rem;
    background: var(--dot-off);
    border-radius: 8px;
}

.source-website-preview {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.source-website-link {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    color: var(--ink-mid);
    text-decoration: underline;
    align-self: center;
}
.source-website-link:hover {
    color: var(--ink);
}

.source-website-frame {
    width: 100%;
    height: 65vh;
    border: 1px solid var(--dot-off);
    border-radius: 10px;
}

.source-website-hint {
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    color: var(--ink-faint);
    text-align: center;
}

.source-doc-preview {
    max-height: 65vh;
    overflow-y: auto;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.9rem;
    line-height: 1.65;
    color: var(--ink);
}
.source-doc-preview h1,
.source-doc-preview h2,
.source-doc-preview h3,
.source-doc-preview h4 {
    font-family: "EB Garamond", Georgia, serif;
    font-weight: 600;
    margin: 1rem 0 0.5rem;
}
.source-doc-preview p {
    margin-bottom: 0.8rem;
}
.source-doc-preview ul,
.source-doc-preview ol {
    margin: 0 0 0.8rem 1.3rem;
}
.source-doc-preview table {
    border-collapse: collapse;
    width: 100%;
    margin-bottom: 1rem;
    font-size: 0.8rem;
}
.source-doc-preview th,
.source-doc-preview td {
    border: 1px solid var(--dot-off);
    padding: 0.35rem 0.6rem;
    text-align: left;
}
.source-doc-preview th {
    background: var(--dot-off);
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    color: var(--ink-mid);
}
.source-doc-preview .doc-sheet-name {
    font-style: italic;
    color: var(--ink-mid);
}
.source-doc-preview img {
    max-width: 100%;
}
.doc-slide-card {
    padding: 1rem 1.2rem;
    margin-bottom: 0.8rem;
    background: var(--dot-off);
    border-radius: 10px;
}
.doc-slide-number {
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ink-mid);
    margin-bottom: 0.4rem;
}
.doc-slide-text {
    font-size: 0.88rem;
    line-height: 1.6;
}

.source-item-icon {
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    background: var(--dot-off);
    color: var(--ink-mid);
    font-size: 0.7rem;
}

.source-item-name {
    flex: 1;
    min-width: 0;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.82rem;
    color: var(--ink);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.source-item-remove {
    flex-shrink: 0;
    background: none;
    border: none;
    color: var(--ink-faint);
    cursor: pointer;
    font-size: 0.68rem;
    padding: 0.2rem;
}
.source-item-remove:hover {
    color: #b03a3a;
}

.col-empty-note {
    padding: 0 1.2rem 1rem;
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    color: var(--ink-faint);
    text-align: center;
}
.col-empty-note[hidden] {
    display: none;
}

/* ── Coluna de Chat ── */
.notebook-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.nb-chat-bubble {
    max-width: 88%;
    padding: 0.6rem 0.9rem;
    border-radius: 12px;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.88rem;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
}
.nb-chat-bubble.user {
    align-self: flex-end;
    background: var(--ink);
    color: var(--white);
    border-bottom-right-radius: 4px;
}
.nb-chat-bubble.assistant {
    align-self: flex-start;
    background: var(--dot-off);
    color: var(--ink);
    border-bottom-left-radius: 4px;
}
.nb-chat-bubble.pending {
    color: var(--ink-mid);
    font-style: italic;
}

.notebook-chat-form {
    flex-shrink: 0;
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    padding: 0.7rem;
    border-top: 1px solid var(--dot-off);
}

.notebook-chat-input {
    flex: 1;
    resize: none;
    max-height: 100px;
    background: var(--dot-off);
    border: none;
    border-radius: 14px;
    padding: 0.55rem 0.8rem;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.85rem;
    color: var(--ink);
}
.notebook-chat-input:focus {
    outline: 2px solid var(--ink-mid);
}

.notebook-chat-send,
.notebook-chat-stop {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: none;
    color: var(--white);
    font-size: 0.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}
.notebook-chat-send {
    background: var(--ink);
}
.notebook-chat-stop {
    background: #b03a3a;
}
.notebook-chat-stop[hidden] {
    display: none;
}

/* ── Modal de adicionar fontes ── */
.source-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(17, 16, 16, 0.55);
    padding: 1.5rem;
}
.source-modal-overlay[hidden] {
    display: none;
}

.source-modal {
    width: 100%;
    max-width: 420px;
    background: var(--white);
    border-radius: 14px;
    overflow: hidden;
}

.source-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 1.1rem;
    background: var(--dot-off);
    font-family: "DM Mono", monospace;
    font-size: 0.68rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--ink-mid);
}

.source-modal-close {
    background: none;
    border: none;
    color: var(--ink-mid);
    cursor: pointer;
    font-size: 0.85rem;
}
.source-modal-close:hover {
    color: var(--ink);
}

.source-modal-tabs {
    display: flex;
    border-bottom: 1px solid var(--dot-off);
}

.source-tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.7rem 0.5rem;
    background: none;
    border: none;
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    color: var(--ink-faint);
    cursor: pointer;
    border-bottom: 2px solid transparent;
}
.source-tab-btn.is-active {
    color: var(--ink);
    border-bottom-color: var(--ink);
}

.source-tab-panel {
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}
.source-tab-panel[hidden] {
    display: none;
}

.source-pick-file-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1.4rem;
    background: var(--dot-off);
    border: 1px dashed var(--ink-faint);
    border-radius: 12px;
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    color: var(--ink-mid);
    cursor: pointer;
}
.source-pick-file-btn:hover {
    color: var(--ink);
}

.source-text-input,
.source-textarea {
    background: var(--dot-off);
    border: none;
    border-radius: 10px;
    padding: 0.6rem 0.8rem;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.9rem;
    color: var(--ink);
}
.source-textarea {
    resize: vertical;
}
.source-text-input:focus,
.source-textarea:focus {
    outline: 2px solid var(--ink-mid);
}

.source-submit-btn {
    background: var(--ink);
    color: var(--white);
    border: none;
    border-radius: 999px;
    padding: 0.6rem;
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    letter-spacing: 0.04em;
    cursor: pointer;
}
.source-submit-btn:hover {
    opacity: 0.85;
}

.source-search-mode {
    background: var(--dot-off);
    border: none;
    border-radius: 10px;
    padding: 0.55rem 0.7rem;
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    color: var(--ink);
    cursor: pointer;
}

.source-search-results {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 260px;
    overflow-y: auto;
}

.source-search-result {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.6rem 0.7rem;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 10px;
}

.source-search-result-info {
    flex: 1;
    min-width: 0;
}

.source-search-result-title {
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.85rem;
    color: var(--ink);
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.source-search-result-snippet {
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.75rem;
    color: var(--ink-mid);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-top: 0.2rem;
}

.source-search-result-add {
    flex-shrink: 0;
    background: var(--dot-off);
    border: none;
    border-radius: 999px;
    width: 28px;
    height: 28px;
    color: var(--ink-mid);
    cursor: pointer;
    font-size: 0.65rem;
}
.source-search-result-add:hover {
    color: var(--ink);
}
.source-search-result-add:disabled {
    opacity: 0.5;
    cursor: default;
}

.source-search-status {
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    color: var(--ink-mid);
    text-align: center;
}

.source-modal-status {
    padding: 0 1.2rem 1rem;
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    color: var(--ink-mid);
    text-align: center;
}
.source-modal-status[hidden] {
    display: none;
}

/* ── Elementos de Markdown dentro do chat ── */
.msg-heading {
    margin: 0.6rem 0 0.3rem;
    font-family: "EB Garamond", Georgia, serif;
    font-weight: 600;
    line-height: 1.3;
}
h3.msg-heading {
    font-size: 1.02rem;
}
h4.msg-heading {
    font-size: 0.95rem;
}
h5.msg-heading,
h6.msg-heading {
    font-size: 0.88rem;
}
.nb-chat-bubble > .msg-heading:first-child {
    margin-top: 0;
}

.msg-list {
    margin: 0.3rem 0 0.5rem;
    padding-left: 1.2rem;
}
.msg-list li {
    margin-bottom: 0.2rem;
}
.msg-list .msg-list {
    margin: 0.2rem 0;
}

.msg-task-list {
    list-style: none;
    padding-left: 0.3rem;
}
.msg-task {
    display: flex;
    align-items: flex-start;
    gap: 0.4rem;
}
.msg-task input[type="checkbox"] {
    margin-top: 0.3rem;
    accent-color: var(--ink-mid);
}

.msg-quote {
    margin: 0.5rem 0;
    padding: 0.4rem 0.8rem;
    border-left: 3px solid var(--dot-off);
    color: var(--ink-mid);
    font-style: italic;
}
.nb-chat-bubble.user .msg-quote {
    border-left-color: rgba(255, 255, 255, 0.3);
}

.msg-table {
    width: 100%;
    margin: 0.5rem 0;
    border-collapse: collapse;
    font-size: 0.78rem;
}
.msg-table th,
.msg-table td {
    border: 1px solid var(--dot-off);
    padding: 0.3rem 0.5rem;
    text-align: left;
}
.nb-chat-bubble.user .msg-table th,
.nb-chat-bubble.user .msg-table td {
    border-color: rgba(255, 255, 255, 0.2);
}
.msg-table th {
    background: var(--dot-off);
    font-family: "DM Mono", monospace;
    font-size: 0.56rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--ink-mid);
}
.nb-chat-bubble.user .msg-table th {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
}

.nb-chat-bubble del {
    opacity: 0.6;
}

.msg-hr {
    border: none;
    border-top: 1px solid var(--dot-off);
    margin: 0.5rem 0;
}
.nb-chat-bubble.user .msg-hr {
    border-top-color: rgba(255, 255, 255, 0.25);
}

.nb-chat-bubble code {
    background: var(--dot-off);
    border: 1px solid rgba(17, 16, 16, 0.06);
    border-radius: 999px;
    padding: 0.1rem 0.45rem;
    font-family: "DM Mono", monospace;
    font-size: 0.76em;
    white-space: nowrap;
}
.nb-chat-bubble.user code {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.2);
}

.nb-chat-bubble a {
    color: inherit;
    text-decoration: underline;
}

/* ── Coluna Estúdio ── */
.studio-buttons {
    flex-shrink: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    padding: 0.8rem 1rem 0.6rem;
}

.studio-btn {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.55rem 0.6rem;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 10px;
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    letter-spacing: 0.01em;
    color: var(--ink-mid);
    cursor: pointer;
    transition: border-color 0.15s ease, color 0.15s ease;
}
.studio-btn:hover {
    border-color: var(--ink-mid);
    color: var(--ink);
}
.studio-btn:disabled {
    opacity: 0.5;
    cursor: wait;
}
.studio-btn[data-studio-type="audio"],
.studio-btn[data-studio-type="video"] {
    grid-column: 1 / -1;
    justify-content: center;
    background: var(--dot-off);
}

.studio-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.studio-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 0.9rem;
}

.studio-group-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0 0.2rem;
}

.studio-group-name {
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-mid);
}

.studio-rename-icon {
    font-size: 0.55rem;
    color: var(--ink-faint);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s ease;
}
.studio-group-header:hover .studio-rename-icon,
.studio-item:hover .studio-rename-icon {
    opacity: 1;
}
.studio-rename-icon:hover {
    color: var(--ink-mid);
}

.studio-rename-input {
    background: var(--white);
    border: 1px solid var(--ink-mid);
    border-radius: 6px;
    padding: 0.1rem 0.4rem;
    font-family: inherit;
    font-size: inherit;
    color: var(--ink);
}

.studio-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 0.6rem;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 10px;
    cursor: pointer;
}
.studio-item:hover {
    border-color: var(--ink-mid);
}
.studio-item.is-generating {
    opacity: 0.7;
}

.studio-item-icon {
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    background: var(--dot-off);
    color: var(--ink-mid);
    font-size: 0.7rem;
}

.studio-item-name {
    flex: 1;
    min-width: 0;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.82rem;
    color: var(--ink);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.studio-item-remove {
    flex-shrink: 0;
    background: none;
    border: none;
    color: var(--ink-faint);
    cursor: pointer;
    font-size: 0.68rem;
    padding: 0.2rem;
}
.studio-item-remove:hover {
    color: #b03a3a;
}

/* ── Painel de conteúdo do Estúdio ── */
.studio-panel-overlay {
    position: fixed;
    inset: 0;
    z-index: 250;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(17, 16, 16, 0.55);
    padding: 2rem;
}
.studio-panel-overlay[hidden] {
    display: none;
}

.studio-panel {
    width: 100%;
    max-width: 640px;
    max-height: 84vh;
    display: flex;
    flex-direction: column;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 14px;
    overflow: hidden;
}

.studio-panel-header {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 1.1rem;
    background: var(--dot-off);
    font-family: "DM Mono", monospace;
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    color: var(--ink-mid);
}

.studio-panel-close {
    background: none;
    border: none;
    color: var(--ink-mid);
    cursor: pointer;
    font-size: 0.85rem;
}
.studio-panel-close:hover {
    color: var(--ink);
}

.studio-panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 1.4rem 1.6rem;
}

.studio-loading {
    text-align: center;
    font-family: "EB Garamond", Georgia, serif;
    font-style: italic;
    color: var(--ink-mid);
    padding: 2rem 0;
}

.studio-error {
    text-align: center;
    font-family: "DM Mono", monospace;
    font-size: 0.7rem;
    color: #b03a3a;
    padding: 2rem 0;
}

/* Relatório */
.studio-report p {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}

/* Mapa mental */
.mindmap-toolbar {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 0.6rem;
}
.mindmap-tool-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: var(--dot-off);
    border: none;
    border-radius: 8px;
    color: var(--ink-mid);
    font-size: 0.7rem;
    cursor: pointer;
}
.mindmap-tool-btn:hover {
    color: var(--ink);
}
.mindmap-viewport {
    overflow: hidden;
    width: 100%;
    height: 420px;
    border: 1px solid var(--dot-off);
    border-radius: 12px;
    cursor: grab;
}
.mindmap-viewport.is-dragging {
    cursor: grabbing;
}
.studio-panel.is-maximized {
    max-width: 96vw;
    max-height: 94vh;
    width: 96vw;
    height: 94vh;
}
.studio-panel.is-maximized .mindmap-viewport {
    height: 100%;
}
.mindmap-svg {
    width: 900px;
    height: 600px;
    display: block;
    transform-origin: 0 0;
    transition: transform 0.05s linear;
    user-select: none;
}
.mindmap-node-box.is-focused {
    outline: 2px solid var(--ink);
    outline-offset: 2px;
}
.mindmap-edge {
    stroke: var(--ink-faint);
    stroke-width: 1.5;
}
.mindmap-node-box {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0.4rem 0.7rem;
    border-radius: 999px;
    font-family: "EB Garamond", Georgia, serif;
    line-height: 1.25;
    box-sizing: border-box;
}
.mindmap-node-box.level-0 {
    background: var(--ink);
    color: var(--white);
    font-style: italic;
    font-weight: 600;
    font-size: 1.05rem;
}
.mindmap-node-box.level-1 {
    background: var(--dot-off);
    color: var(--ink);
    font-weight: 500;
    font-size: 0.85rem;
    border: 1px solid var(--ink-faint);
}
.mindmap-node-box.level-2 {
    background: var(--white);
    color: var(--ink-mid);
    font-size: 0.75rem;
    border: 1px solid var(--dot-off);
}

/* Cartões de memória */
.flashcard-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}
.flashcard {
    width: 100%;
    max-width: 380px;
    min-height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 1.5rem;
    background: var(--dot-off);
    border-radius: 14px;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 1.05rem;
    color: var(--ink);
    cursor: pointer;
}
.flashcard-hint {
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    color: var(--ink-faint);
}
.flashcard-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.flashcard-nav button {
    background: none;
    border: 1px solid var(--dot-off);
    border-radius: 999px;
    width: 34px;
    height: 34px;
    color: var(--ink-mid);
    cursor: pointer;
}
.flashcard-nav button:hover {
    border-color: var(--ink-mid);
    color: var(--ink);
}
.flashcard-counter {
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    color: var(--ink-mid);
}

/* Questionário */
.quiz-progress {
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-bottom: 1rem;
    text-align: center;
}
.quiz-question {
    margin-bottom: 1.2rem;
}
.quiz-question-text {
    font-family: "EB Garamond", Georgia, serif;
    font-size: 1.05rem;
    font-weight: 500;
    margin-bottom: 0.9rem;
}
.quiz-option {
    display: block;
    width: 100%;
    text-align: left;
    padding: 0.6rem 0.8rem;
    margin-bottom: 0.4rem;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 10px;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.9rem;
    color: var(--ink);
    cursor: pointer;
}
.quiz-option:hover {
    border-color: var(--ink-mid);
}
.quiz-option.correct {
    border-color: #4f7d4a;
    background: #eef4ec;
}
.quiz-option.incorrect {
    border-color: #b03a3a;
    background: #f6eaea;
}
.quiz-next-btn {
    display: block;
    width: 100%;
    background: var(--ink);
    color: var(--white);
    border: none;
    border-radius: 999px;
    padding: 0.65rem;
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    letter-spacing: 0.03em;
    cursor: pointer;
}
.quiz-next-btn:hover {
    opacity: 0.85;
}
.quiz-next-btn[hidden] {
    display: none;
}
.quiz-final-score {
    text-align: center;
    font-family: "EB Garamond", Georgia, serif;
    font-style: italic;
    font-size: 1.2rem;
    color: var(--ink);
    padding: 1.5rem 0;
}

.quiz-start {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
    padding: 1.5rem 0;
}
.quiz-start-text {
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.95rem;
    color: var(--ink-mid);
    text-align: center;
}

.quiz-perfect {
    text-align: center;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 1rem;
    color: var(--ink);
    padding: 1rem 0 1.5rem;
}

.quiz-review {
    margin: 1rem 0 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--dot-off);
}
.quiz-review-title {
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ink-mid);
    margin-bottom: 0.8rem;
}
.quiz-review-item {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--dot-off);
}
.quiz-review-item:last-child {
    border-bottom: none;
}
.quiz-review-question {
    font-family: "EB Garamond", Georgia, serif;
    font-weight: 500;
    font-size: 0.92rem;
    margin-bottom: 0.4rem;
}
.quiz-review-wrong {
    font-size: 0.82rem;
    color: #b03a3a;
    margin-bottom: 0.2rem;
}
.quiz-review-correct {
    font-size: 0.82rem;
    color: #4f7d4a;
    margin-bottom: 0.4rem;
}
.quiz-review-explanation {
    font-family: "EB Garamond", Georgia, serif;
    font-style: italic;
    font-size: 0.82rem;
    color: var(--ink-mid);
}

/* Infografia */
.infographic-image-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
}
.infographic-image {
    width: 100%;
    max-width: 420px;
    border-radius: 12px;
    display: block;
}

/* Apresentação */
.slide-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}
.slide {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 1.8rem 2.2rem;
    background: var(--dot-off) center / cover no-repeat;
    border-radius: 14px;
    overflow: hidden;
}
.slide.has-image {
    justify-content: flex-end;
    padding: 0;
}
.slide-caption {
    position: relative;
    z-index: 1;
    padding: 1.4rem 1.6rem;
}
.slide.has-image .slide-caption {
    background: linear-gradient(to top, rgba(17, 16, 16, 0.78) 20%, rgba(17, 16, 16, 0));
    color: var(--white);
}
.slide.has-image .slide-caption .slide-title {
    color: var(--white);
}
.slide.has-image .slide-caption .slide-bullets li {
    color: rgba(255, 255, 255, 0.92);
}
.slide-image-loading {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ink-faint);
    font-size: 1.6rem;
}

/* Leitor de vídeo do resumo */
.video-player {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.9rem;
}

.video-frame {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #faf7f0;
    border: 1px solid var(--dot-off);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}
.video-frame:fullscreen {
    aspect-ratio: unset;
    border-radius: 0;
}

.video-slide-image {
    position: absolute;
    inset: 0;
    background: #faf7f0 center / contain no-repeat;
}

.video-slide-caption {
    position: relative;
    z-index: 1;
    padding: 1.4rem 1.8rem;
    background: linear-gradient(to top, rgba(250, 247, 240, 0.96) 45%, rgba(250, 247, 240, 0));
}

.video-slide-title {
    font-family: "EB Garamond", Georgia, serif;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--ink);
    margin-bottom: 0.4rem;
}

.video-slide-bullets {
    list-style: none;
}
.video-slide-bullets li {
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.88rem;
    color: var(--ink-mid);
    line-height: 1.5;
    padding-left: 1rem;
    position: relative;
}
.video-slide-bullets li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--ink-faint);
}

.video-progress-row {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    width: 100%;
}

.video-time {
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    color: var(--ink-mid);
    min-width: 32px;
}

.video-progress-bar {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 999px;
    background: var(--dot-off);
    cursor: pointer;
}
.video-progress-bar::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--ink);
    cursor: pointer;
}
.video-progress-bar::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border: none;
    border-radius: 50%;
    background: var(--ink);
    cursor: pointer;
}

.video-controls-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.video-ctrl-btn {
    display: flex;
    align-items: center;
    gap: 0.15rem;
    background: none;
    border: none;
    color: var(--ink-mid);
    font-family: "DM Mono", monospace;
    font-size: 0.7rem;
    cursor: pointer;
    padding: 0.3rem;
}
.video-ctrl-btn:hover {
    color: var(--ink);
}

.video-play-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--ink);
    color: var(--white);
    border: none;
    font-size: 1rem;
    cursor: pointer;
}
.video-play-btn:hover {
    opacity: 0.85;
}

.video-slide-counter {
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    letter-spacing: 0.04em;
    color: var(--ink-faint);
}
.slide-title {
    font-family: "EB Garamond", Georgia, serif;
    font-style: italic;
    font-weight: 600;
    font-size: 1.3rem;
    margin-bottom: 0.9rem;
}
.slide-bullets {
    margin-left: 1.2rem;
}
.slide-bullets li {
    font-size: 0.95rem;
    line-height: 1.7;
}
.slide-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.slide-nav button {
    background: none;
    border: 1px solid var(--dot-off);
    border-radius: 999px;
    width: 34px;
    height: 34px;
    color: var(--ink-mid);
    cursor: pointer;
}
.slide-nav button:hover {
    border-color: var(--ink-mid);
    color: var(--ink);
}
.slide-counter {
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    color: var(--ink-mid);
}

/* Resumo de áudio */
.audio-script {
    font-family: "EB Garamond", Georgia, serif;
    font-style: italic;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--ink-mid);
    margin-bottom: 1.3rem;
}

.audio-player-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.7rem;
    padding-top: 1rem;
    border-top: 1px solid var(--dot-off);
}

.audio-generate-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: 0 auto;
    background: var(--ink);
    color: var(--white);
    border: none;
    border-radius: 999px;
    padding: 0.6rem 1.2rem;
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    letter-spacing: 0.03em;
    cursor: pointer;
}
.audio-generate-btn:hover {
    opacity: 0.85;
}
.audio-generate-btn:disabled {
    opacity: 0.6;
    cursor: wait;
}

.audio-player {
    width: 100%;
}

.audio-download-link {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    color: var(--ink-mid);
    text-decoration: underline;
}
.audio-download-link:hover {
    color: var(--ink);
}

/* Resumo de vídeo */
.video-status {
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    color: var(--ink-mid);
    min-height: 1em;
}

.video-stop-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: none;
    border: 1px solid var(--dot-off);
    border-radius: 999px;
    padding: 0.45rem 1rem;
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    color: #b03a3a;
    cursor: pointer;
}
.video-stop-btn:hover {
    border-color: #b03a3a;
}

/* ── Modal de personalização do Estúdio ── */
.customize-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(17, 16, 16, 0.55);
    padding: 1.5rem;
}
.customize-modal-overlay[hidden] {
    display: none;
}

.customize-modal {
    width: 100%;
    max-width: 520px;
    max-height: 88vh;
    display: flex;
    flex-direction: column;
    background: var(--white);
    border-radius: 14px;
    overflow: hidden;
}

.customize-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 1.1rem;
    background: var(--dot-off);
    font-family: "DM Mono", monospace;
    font-size: 0.68rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--ink-mid);
    flex-shrink: 0;
}

.customize-modal-close {
    background: none;
    border: none;
    color: var(--ink-mid);
    font-size: 0.9rem;
    cursor: pointer;
}
.customize-modal-close:hover {
    color: var(--ink);
}

.customize-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.customize-modal-footer {
    padding: 0.9rem 1.1rem;
    border-top: 1px solid var(--dot-off);
    display: flex;
    justify-content: flex-end;
    flex-shrink: 0;
}

.customize-generate-btn {
    background: var(--ink);
    color: var(--white);
    border: none;
    border-radius: 999px;
    padding: 0.6rem 1.6rem;
    font-family: "DM Mono", monospace;
    font-size: 0.68rem;
    letter-spacing: 0.03em;
    cursor: pointer;
}
.customize-generate-btn:hover {
    opacity: 0.85;
}
.customize-generate-btn:disabled {
    opacity: 0.5;
    cursor: default;
}

.cz-field-label {
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ink-mid);
    margin-bottom: 0.5rem;
    display: block;
}

.cz-pill-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.cz-pill {
    padding: 0.4rem 0.9rem;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 999px;
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    color: var(--ink-mid);
    cursor: pointer;
}
.cz-pill:hover {
    border-color: var(--ink-mid);
}
.cz-pill.is-active {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--white);
}

.cz-format-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.7rem;
}
.cz-format-card {
    text-align: left;
    padding: 0.8rem 0.9rem;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 12px;
    cursor: pointer;
}
.cz-format-card:hover {
    border-color: var(--ink-mid);
}
.cz-format-card.is-active {
    border-color: var(--ink);
    background: #f7f4ee;
}
.cz-format-card-title {
    font-family: "EB Garamond", Georgia, serif;
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--ink);
    margin-bottom: 0.25rem;
}
.cz-format-card-desc {
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.75rem;
    color: var(--ink-mid);
    line-height: 1.4;
}

.cz-style-carousel {
    display: flex;
    gap: 0.6rem;
    overflow-x: auto;
    padding-bottom: 0.3rem;
}
.cz-style-item {
    flex-shrink: 0;
    width: 84px;
    text-align: center;
    cursor: pointer;
}
.cz-style-swatch {
    width: 84px;
    height: 60px;
    border-radius: 10px;
    background: var(--dot-off);
    border: 2px solid transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ink-faint);
    font-size: 1rem;
    margin-bottom: 0.3rem;
}
.cz-style-item.is-active .cz-style-swatch {
    border-color: var(--ink);
}
.cz-style-name {
    font-family: "DM Mono", monospace;
    font-size: 0.55rem;
    color: var(--ink-mid);
}

.cz-textarea {
    width: 100%;
    min-height: 80px;
    padding: 0.7rem 0.8rem;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 10px;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.88rem;
    color: var(--ink);
    resize: vertical;
}
.cz-textarea::placeholder {
    color: var(--ink-faint);
}

.cz-chips {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.6rem;
}
.cz-chip {
    padding: 0.35rem 0.75rem;
    background: var(--dot-off);
    border: none;
    border-radius: 999px;
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    color: var(--ink-mid);
    cursor: pointer;
}
.cz-chip:hover {
    background: var(--ink);
    color: var(--white);
}

/* Tabela de dados */
.datatable-wrap {
    overflow-x: auto;
}
.datatable-toolbar {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 0.6rem;
}
.datatable-export-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.8rem;
    background: var(--dot-off);
    border: none;
    border-radius: 999px;
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    color: var(--ink-mid);
    cursor: pointer;
}
.datatable-export-btn:hover {
    color: var(--ink);
}

.datatable {
    width: 100%;
    border-collapse: collapse;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.85rem;
}
.datatable th.is-sortable {
    cursor: pointer;
    user-select: none;
}
.datatable th.is-sortable:hover {
    color: var(--ink);
}
.datatable-sort-hint {
    opacity: 0.3;
    font-size: 0.55rem;
    margin-left: 0.3rem;
}
.datatable th i {
    margin-left: 0.3rem;
    font-size: 0.55rem;
}
.datatable th {
    text-align: left;
    padding: 0.55rem 0.8rem;
    background: var(--dot-off);
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--ink-mid);
    white-space: nowrap;
}
.datatable td {
    padding: 0.55rem 0.8rem;
    border-bottom: 1px solid var(--dot-off);
    color: var(--ink);
    vertical-align: top;
}
.datatable tr:last-child td {
    border-bottom: none;
}
.datatable tr:hover td {
    background: #faf7f0;
}

/* Barra de ferramentas das fontes */
.source-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.6rem;
    gap: 0.6rem;
}

.source-toolbar-left {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.source-autogroup-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    background: none;
    border: none;
    color: var(--ink-mid);
    font-size: 0.75rem;
    cursor: pointer;
    flex-shrink: 0;
}
.source-autogroup-btn:hover {
    color: var(--ink);
}
.source-autogroup-btn.is-spinning i {
    animation: spin 1s linear infinite;
}
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.source-sort-wrap {
    position: relative;
}
.source-sort-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    background: none;
    border: none;
    color: var(--ink-mid);
    font-size: 0.75rem;
    cursor: pointer;
}
.source-sort-btn:hover {
    color: var(--ink);
}
.source-sort-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 20;
    margin-top: 0.3rem;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 10px;
    box-shadow: 0 4px 16px rgba(17, 16, 16, 0.12);
    overflow: hidden;
    min-width: 120px;
}
.source-sort-option {
    display: block;
    width: 100%;
    text-align: left;
    padding: 0.5rem 0.8rem;
    background: none;
    border: none;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.85rem;
    color: var(--ink-mid);
    cursor: pointer;
}
.source-sort-option:hover {
    background: var(--dot-off);
}
.source-sort-option.is-active {
    color: var(--ink);
    font-weight: 600;
}

.source-select-all {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    color: var(--ink-mid);
    cursor: pointer;
    flex-shrink: 0;
}

.source-item-checkbox {
    display: flex;
    align-items: center;
    cursor: pointer;
    flex-shrink: 0;
}

.source-group {
    margin-bottom: 0.4rem;
}
.source-group-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    width: 100%;
    background: none;
    border: none;
    padding: 0.4rem 0.2rem;
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--ink-mid);
    cursor: pointer;
}
.source-group-header i {
    font-size: 0.6rem;
    transition: transform 0.15s ease;
}
.source-group-header.is-open i {
    transform: rotate(90deg);
}
.source-group-items {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    padding-left: 0.6rem;
    margin-top: 0.3rem;
}

/* Botão de adicionar nota */
.add-note-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    width: 100%;
    margin-top: 0.8rem;
    padding: 0.55rem;
    background: none;
    border: 1px dashed var(--dot-off);
    border-radius: 10px;
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    color: var(--ink-mid);
    cursor: pointer;
}
.add-note-btn:hover {
    border-color: var(--ink-mid);
    color: var(--ink);
}

.note-textarea {
    width: 100%;
    min-height: 320px;
    padding: 0.8rem;
    border: 1px solid var(--dot-off);
    border-radius: 10px;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--ink);
    resize: vertical;
}
.note-save-status {
    font-family: "DM Mono", monospace;
    font-size: 0.58rem;
    color: var(--ink-faint);
    margin-top: 0.4rem;
    text-align: right;
    min-height: 1em;
}

/* Barra de estatísticas / partilhar */
.notebook-toolbar-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.9rem;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 999px;
    font-family: "DM Mono", monospace;
    font-size: 0.62rem;
    color: var(--ink-mid);
    cursor: pointer;
    flex-shrink: 0;
    white-space: nowrap;
}
.notebook-toolbar-btn:hover {
    border-color: var(--ink-mid);
    color: var(--ink);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.7rem;
    margin-bottom: 1.2rem;
}
.stats-card {
    text-align: center;
    padding: 1rem 0.6rem;
    background: var(--dot-off);
    border-radius: 12px;
}
.stats-value {
    font-family: "EB Garamond", Georgia, serif;
    font-weight: 600;
    font-size: 1.5rem;
    color: var(--ink);
}
.stats-label {
    font-family: "DM Mono", monospace;
    font-size: 0.55rem;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: var(--ink-mid);
    margin-top: 0.3rem;
}
.stats-breakdown {
    border-top: 1px solid var(--dot-off);
    padding-top: 0.8rem;
}
.stats-breakdown-row {
    display: flex;
    justify-content: space-between;
    padding: 0.4rem 0;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.88rem;
    color: var(--ink);
    border-bottom: 1px solid var(--dot-off);
}
.stats-breakdown-row:last-child {
    border-bottom: none;
}

.share-note {
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--ink-mid);
}

/* Ações nas mensagens do chat */
.nb-chat-bubble {
    position: relative;
}
.nb-chat-actions {
    display: flex;
    gap: 0.4rem;
    margin-top: 0.4rem;
    opacity: 0;
    transition: opacity 0.15s ease;
}
.nb-chat-bubble:hover .nb-chat-actions {
    opacity: 1;
}
.nb-chat-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--dot-off);
    border: none;
    border-radius: 50%;
    color: var(--ink-mid);
    font-size: 0.6rem;
    cursor: pointer;
}
.nb-chat-action-btn:hover {
    color: var(--ink);
}

.cz-suggestions-loading {
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    color: var(--ink-faint);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* Linha do tempo */
.timeline-wrap {
    display: flex;
    flex-direction: column;
}
.timeline-item {
    display: flex;
    gap: 1rem;
}
.timeline-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
    width: 14px;
}
.timeline-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--ink);
    flex-shrink: 0;
    margin-top: 0.3rem;
}
.timeline-line {
    flex: 1;
    width: 2px;
    background: var(--dot-off);
    margin-top: 0.2rem;
}
.timeline-item:last-child .timeline-line {
    display: none;
}
.timeline-card {
    flex: 1;
    padding-bottom: 1.4rem;
}
.timeline-date {
    font-family: "DM Mono", monospace;
    font-size: 0.6rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--ink-mid);
    margin-bottom: 0.2rem;
}
.timeline-title {
    font-family: "EB Garamond", Georgia, serif;
    font-weight: 600;
    font-size: 1rem;
    color: var(--ink);
    margin-bottom: 0.3rem;
}
.timeline-desc {
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.88rem;
    line-height: 1.55;
    color: var(--ink-mid);
}

.item-source {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin-top: 0.5rem;
    font-family: "DM Mono", monospace;
    font-size: 0.55rem;
    letter-spacing: 0.02em;
    color: var(--ink-faint);
}

.chat-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    padding: 0 0.9rem 0.6rem;
}
.chat-suggestion-chip {
    padding: 0.4rem 0.8rem;
    background: var(--white);
    border: 1px solid var(--dot-off);
    border-radius: 999px;
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.8rem;
    color: var(--ink-mid);
    cursor: pointer;
    text-align: left;
}
.chat-suggestion-chip:hover {
    border-color: var(--ink-mid);
    color: var(--ink);
}

.confirm-modal {
    max-width: 380px;
}
.confirm-modal-message {
    font-family: "EB Garamond", Georgia, serif;
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--ink-mid);
}
.confirm-modal-footer {
    justify-content: flex-end;
    gap: 0.6rem;
}
.confirm-modal-cancel-btn {
    background: none;
    border: 1px solid var(--dot-off);
    border-radius: 999px;
    padding: 0.55rem 1.3rem;
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    color: var(--ink-mid);
    cursor: pointer;
}
.confirm-modal-cancel-btn:hover {
    border-color: var(--ink-mid);
    color: var(--ink);
}
.confirm-modal-danger-btn {
    background: #b03a3a;
    color: var(--white);
    border: none;
    border-radius: 999px;
    padding: 0.55rem 1.3rem;
    font-family: "DM Mono", monospace;
    font-size: 0.65rem;
    letter-spacing: 0.03em;
    cursor: pointer;
}
.confirm-modal-danger-btn:hover {
    opacity: 0.85;
}