/* ---------- Library page (Pages/Library.razor): topic navigation + content ---------- */

.lib-page {
    max-width: 1760px;
    margin: 0 auto;
    padding: 32px 40px 24px;
}

.lib-head {
    margin-bottom: 24px;
}

.lib-kicker {
    margin: 0 0 4px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--en-mouth-ink);
}

.lib-layout {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
}

.lib-nav {
    position: sticky;
    top: 88px;
    display: grid;
    gap: 18px;
}

.lib-nav-group {
    display: grid;
    gap: 2px;
}

.lib-nav-label {
    padding: 0 12px 4px;
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--en-ink-muted);
}

.lib-nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 12px;
    border-radius: var(--en-radius-md);
    color: var(--en-ink-soft);
    font-weight: 500;
    text-decoration: none;
}

.lib-nav-link:hover {
    background: var(--en-surface-2);
    color: var(--en-ink);
}

.lib-nav-link.is-active {
    background: var(--en-mouth-soft);
    color: var(--en-mouth-ink);
    font-weight: 600;
}

.lib-nav-link.is-locked {
    color: var(--en-ink-muted);
}

.lib-content {
    min-width: 0;
}

/* Dropdown instead of the list on small screens */
.lib-nav-menu {
    display: none;
}

.lib-nav-menu-button {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: 1px solid var(--en-line-strong);
    border-radius: var(--en-radius-md);
    background: var(--en-surface);
    color: var(--en-ink);
}

.lib-nav-menu-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--en-ink-muted);
}

.lib-nav-menu-current {
    flex: 1;
    font-weight: 600;
}

.lib-nav-menu[open] .lib-nav-menu-button .en-icon {
    transform: rotate(180deg);
}

.lib-nav-menu-panel {
    left: 0;
    right: 0;
}

.lib-nav-menu-panel .lib-nav-label {
    padding: 10px 10px 4px;
}

.lib-nav-menu-panel a {
    justify-content: space-between;
}

.lib-nav-menu-panel a.is-active {
    background: var(--en-mouth-soft);
    color: var(--en-mouth-ink);
    font-weight: 600;
}

.lib-nav-menu-panel a.is-locked {
    color: var(--en-ink-muted);
}

@media (max-width: 960px) {
    .lib-page {
        padding: 24px 16px;
    }

    .lib-layout {
        grid-template-columns: minmax(0, 1fr);
        gap: 20px;
    }

    .lib-nav {
        display: none;
    }

    .lib-nav-menu {
        display: block;
    }
}

/* ---------- Style topics (MouthShapesCore, LipFormsCore, MouthStylesCore, TongueStylesSimple, TongueStylesPrecise) ---------- */

/* Picker and head (LibraryStyleBrowser) */

.lib-browser {
    display: grid;
    gap: 24px;
}

.lib-picker {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.lib-picker-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 18px 8px 8px;
    border: 1px solid var(--en-line);
    border-radius: var(--en-radius-lg);
    background: var(--en-surface);
    color: var(--en-ink-soft);
    font: 600 0.95rem/1.2 var(--en-font-body);
    cursor: pointer;
    transition: border-color .15s, box-shadow .15s, color .15s;
}

.lib-picker-item img {
    width: 44px;
    height: 44px;
    object-fit: contain;
}

.lib-picker-item:hover {
    border-color: var(--en-line-strong);
    color: var(--en-ink);
}

.lib-picker-item[aria-pressed="true"] {
    border-color: var(--en-mouth);
    box-shadow: 0 0 0 3px var(--en-mouth-soft);
    color: var(--en-mouth-ink);
}

.lib-browser-head {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lib-browser-head img {
    width: 72px;
    height: 72px;
    object-fit: contain;
}

.lib-browser-title {
    margin: 0;
    font: 700 clamp(1.8rem, 1.4rem + 1.4vw, 2.6rem)/1.1 var(--en-font-display);
    letter-spacing: -0.02em;
    color: var(--en-ink);
}

/* Detail: photo, video, explanation (LibraryStyleDetail) */

.lib-detail {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr)) minmax(0, 1.15fr);
    gap: 16px;
}

.lib-detail-frame {
    position: relative;
    aspect-ratio: 1 / 1;
    border: 1px solid var(--en-line);
    border-radius: var(--en-radius-lg);
    background: var(--en-surface-2);
    overflow: hidden;
}

.lib-detail-frame > img,
.lib-detail-frame > video,
.lib-detail-frame figure,
.lib-detail-frame figure img,
.lib-detail-frame figure video {
    display: block;
    width: 100%;
    height: 100%;
    margin: 0;
    object-fit: cover;
}

/* Placeholder of LessonImage / LessonVideo (lesson.css) fills the frame, e.g. Precise styles without media */
.lib-detail-frame .lesson-media-placeholder {
    height: 100%;
    border: 0;
    border-radius: 0;
}

/* LockedFeatureCard (images.css) fills the frame */
.lib-detail-frame .dialog-card-preview {
    width: 100%;
    height: 100%;
    margin: 0;
    border: 0;
    border-radius: 0;
}

/* The text column takes the height of the media and scrolls inside */
.lib-detail-text {
    position: relative;
    min-height: 240px;
    border: 1px solid var(--en-line);
    border-radius: var(--en-radius-lg);
    background: var(--en-surface);
}

.lib-detail-text-inner {
    position: absolute;
    inset: 0;
    padding: 20px;
    overflow-y: auto;
}

.lib-detail-steps {
    display: grid;
    gap: 10px;
    margin: 12px 0 0;
    padding-left: 1.3em;
    line-height: 1.6;
    color: var(--en-ink-soft);
}

.lib-detail-steps li::marker {
    font-weight: 700;
    color: var(--en-mouth-ink);
}

.lib-detail-extra {
    margin: 14px 0 0;
    color: var(--en-ink);
}

.lib-dialog-icon {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

/* Tiles (LibraryStyleTile) */

.lib-tile {
    display: grid;
    justify-items: center;
    align-content: center;
    gap: 6px;
    width: 100%;
    min-height: 120px;
    padding: 12px 8px;
    border: 1px solid var(--en-line);
    border-radius: var(--en-radius-lg);
    background: var(--en-surface);
    color: var(--en-ink);
    font: inherit;
    cursor: pointer;
    transition: border-color .15s, box-shadow .15s;
}

.lib-tile:hover {
    border-color: var(--en-mouth);
    box-shadow: var(--en-shadow-2);
}

.lib-tile:focus-visible {
    outline: 2px solid var(--en-mouth);
    outline-offset: 2px;
}

.lib-tile img {
    width: 88px;
    height: 88px;
    object-fit: contain;
    filter: drop-shadow(0 6px 10px rgba(0, 0, 0, .18));
}

.lib-tile-label {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.lib-tile-code {
    font-size: 0.75rem;
    color: var(--en-ink-muted);
}

.lib-tile-empty {
    min-height: 120px;
    border-radius: var(--en-radius-lg);
    background: var(--en-surface-2);
}

/* Mouth Styles matrix */

.lib-style-matrix {
    display: grid;
    grid-template-columns: minmax(90px, auto) repeat(3, minmax(0, 1fr));
    gap: 10px;
    max-width: 960px;
}

.lib-style-matrix-row {
    display: contents;
}

.lib-axis {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px;
    font: 650 1rem/1.2 var(--en-font-display);
    text-align: center;
    color: var(--en-mouth-ink);
}

.lib-axis-row {
    justify-content: flex-start;
    text-align: left;
}

/* Tongue Styles maps (Simple and Precise) */

.lib-tongue {
    display: grid;
    gap: 36px;
    max-width: 960px;
}

.lib-tongue-section {
    display: grid;
    gap: 12px;
}

.lib-tongue-title {
    margin: 0;
    font: 650 1.3rem/1.2 var(--en-font-display);
    color: var(--en-ink);
}

.lib-tongue-axis {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    padding: 0 10px;
}

.lib-tongue-axis span,
.lib-precise-axis {
    font-size: 0.85rem;
    font-weight: 700;
    text-align: center;
    color: var(--en-ink-soft);
}

/* Simple: tiles placed by start column and width (inline style), the empty spots show the grid background */
.lib-tongue-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    padding: 10px;
    border-radius: var(--en-radius-xl);
    background: var(--en-surface-2);
}

.lib-precise-grid {
    display: grid;
    grid-template-columns: 130px repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.lib-precise-height {
    display: grid;
    align-content: center;
    font-weight: 700;
    color: var(--en-ink);
}

.lib-precise-height small {
    font-weight: 500;
    color: var(--en-ink-muted);
}

@media (max-width: 1100px) {
    .lib-detail {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .lib-detail-text {
        grid-column: 1 / -1;
        min-height: 0;
    }

    .lib-detail-text-inner {
        position: static;
    }
}

@media (max-width: 560px) {
    .lib-detail {
        grid-template-columns: minmax(0, 1fr);
    }

    .lib-picker-item {
        padding-right: 12px;
    }

    .lib-tile {
        min-height: 88px;
        padding: 8px 4px;
    }

    .lib-tile img {
        width: 56px;
        height: 56px;
    }

    .lib-tile-label {
        font-size: 0.72rem;
    }

    .lib-tile-empty {
        min-height: 88px;
    }

    .lib-style-matrix,
    .lib-tongue-grid,
    .lib-precise-grid {
        gap: 6px;
    }

    .lib-style-matrix {
        grid-template-columns: 72px repeat(3, minmax(0, 1fr));
    }

    .lib-precise-grid {
        grid-template-columns: 76px repeat(3, minmax(0, 1fr));
    }

    .lib-axis {
        font-size: 0.82rem;
    }
}