/* drill-view.css — Elite Tactician styling for /drill/{uuid}
 *
 * Design language follows the ET system:
 *   - Surfaces define depth, not borders (no hard lines)
 *   - Space Grotesk headlines + Inter body
 *   - Crimson (#b6152e = --et-secondary) is the accent
 *   - Power Navy (#040e21 = --et-primary) is the depth
 *   - Ambient shadows, rounded corners, subtle lift on hover
 *   - 4px bottom accent on card hover
 */

/* ────────────────────────────────────────────────────────────
 * Container
 * ──────────────────────────────────────────────────────────── */
.drill-view-container {
    max-width: 72rem;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
    color: var(--et-on-surface);
}

/* ────────────────────────────────────────────────────────────
 * Header — title + action toolbar
 * ──────────────────────────────────────────────────────────── */
.drill-view-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
}

.drill-view-title {
    font-family: var(--font-headline, 'Space Grotesk', sans-serif);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--et-primary);
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    margin: 0;
    flex: 1 1 auto;
    min-width: 0;
    word-wrap: break-word;
}

/* Owner-assigned custom logo — branded for every viewer, right-aligned
   under the header to mirror the per-drill print/PDF placement. */
.drill-view-logo {
    display: flex;
    justify-content: flex-end;
    margin-bottom: var(--space-sm);
}

.drill-view-logo img {
    max-height: 56px;
    max-width: 220px;
    width: auto;
    height: auto;
}

/* Action toolbar — chip-rail of icon-only buttons */
.drill-view-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    align-items: center;
    flex-shrink: 0;
    padding: 0.25rem;
    background: var(--et-surface-container-low);
    border-radius: var(--radius-full, 9999px);
}

.drill-view-action-btn {
    width: 2.5rem;
    height: 2.5rem;
    min-width: 2.5rem;
    padding: 0;
    border: none;
    border-radius: var(--radius-full, 9999px);
    background: transparent;
    color: var(--et-on-surface-variant);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 150ms ease, color 150ms ease, transform 150ms ease, box-shadow 200ms ease;
}

.drill-view-action-btn i {
    font-size: 0.9375rem;
}

.drill-view-action-btn:hover {
    background: var(--et-surface-container-lowest);
    color: var(--et-secondary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-ambient-sm);
}

.drill-view-action-btn:focus-visible {
    outline: 2px solid var(--et-secondary);
    outline-offset: 2px;
}

.drill-view-action-btn:active {
    transform: translateY(0);
}

.drill-view-action-btn.is-favorited {
    color: var(--et-warning);
    background: color-mix(in srgb, var(--et-warning) 12%, transparent);
}

.drill-view-action-btn.is-favorited:hover {
    color: var(--et-warning);
    background: color-mix(in srgb, var(--et-warning) 20%, transparent);
}

/* "Originally created by …" attribution row (logged-in non-owner only) */
.drill-view-attribution {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    margin-bottom: var(--space-xl);
    padding: 0.375rem 0.75rem;
    background: color-mix(in srgb, var(--et-tertiary) 10%, transparent);
    color: var(--et-tertiary);
    border-radius: var(--radius-full, 9999px);
    font-size: 0.8125rem;
    font-weight: 500;
}

.drill-view-attribution i {
    font-size: 0.75rem;
}

/* Divider between header and content */
.drill-view-divider {
    height: 1px;
    background: var(--et-surface-container-high);
    margin: 0 0 var(--space-xl);
    border: 0;
}

/* ────────────────────────────────────────────────────────────
 * Tabs — underline style with crimson accent
 * ──────────────────────────────────────────────────────────── */
.drill-view-tabs {
    display: flex;
    gap: 0;
    margin-bottom: var(--space-lg);
    overflow-x: auto;
    scrollbar-width: none;
    border-bottom: 1px solid var(--et-surface-container-high);
}
.drill-view-tabs::-webkit-scrollbar { display: none; }

.drill-view-tab {
    background: transparent;
    border: none;
    padding: 0.875rem 1.25rem;
    margin-bottom: -1px;
    font-family: var(--font-headline, 'Space Grotesk', sans-serif);
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--et-on-surface-variant);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: color 150ms ease, border-color 150ms ease;
    white-space: nowrap;
    min-height: 44px;
}

.drill-view-tab:hover {
    color: var(--et-on-surface);
}

.drill-view-tab.active {
    color: var(--et-secondary);
    border-bottom-color: var(--et-secondary);
}

.drill-view-tab:focus-visible {
    outline: 2px solid var(--et-secondary);
    outline-offset: -2px;
    border-radius: var(--radius-sm);
}

/* ────────────────────────────────────────────────────────────
 * Tab panels + media gallery
 * ──────────────────────────────────────────────────────────── */
.drill-view-tab-panel {
    display: none;
    margin-bottom: var(--space-2xl);
}

.drill-view-tab-panel.active {
    display: block;
}

/* Media stage — the big display area with a soft surface */
.drill-view-media-stage {
    background: var(--et-surface-container-lowest);
    border-radius: var(--radius-xl, 1rem);
    padding: var(--space-md);
    box-shadow: var(--shadow-ambient-sm);
    margin-bottom: var(--space-md);
    min-height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.drill-view-media-item {
    display: none;
    width: 100%;
}

.drill-view-media-item.active {
    display: block;
}

.drill-view-diagram {
    display: block;
    width: 100%;
    height: auto;
    max-height: 70vh;
    object-fit: contain;
    border-radius: var(--radius-lg, 0.75rem);
    margin: 0 auto;
}

.drill-view-animation {
    display: block;
    width: 100%;
    max-height: 70vh;
    border-radius: var(--radius-lg, 0.75rem);
    background: #000;
}

.drill-view-animation-caption {
    text-align: center;
    font-size: 0.875rem;
    color: var(--et-on-surface-variant);
    margin-top: var(--space-sm);
}

.drill-view-video-embed {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    border-radius: var(--radius-lg, 0.75rem);
    overflow: hidden;
    background: var(--et-primary);
}

.drill-view-video-embed iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* Thumbnail strip — only renders when there are 2+ items in a tab */
.drill-view-thumbs {
    display: flex;
    gap: var(--space-sm);
    overflow-x: auto;
    padding: var(--space-xs) 0 var(--space-sm);
    scrollbar-width: thin;
    scrollbar-color: var(--et-surface-container-high) transparent;
    align-items: flex-start;
}

.drill-view-thumb {
    flex: 0 0 auto;
    width: 7rem;
    border: 2px solid transparent;
    border-radius: var(--radius-md, 0.5rem);
    background: var(--et-surface-container-low);
    cursor: pointer;
    padding: 0;
    overflow: hidden;
    transition: border-color 150ms ease, transform 150ms ease, box-shadow 200ms ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--et-on-surface-variant);
    font-size: 1.25rem;
}

.drill-view-thumb img {
    width: 100%;
    height: auto;
    display: block;
}

.drill-view-thumb:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-ambient-sm);
    border-color: color-mix(in srgb, var(--et-secondary) 30%, transparent);
}

.drill-view-thumb.active {
    border-color: var(--et-secondary);
    box-shadow: 0 0 0 1px var(--et-secondary), var(--shadow-ambient-sm);
}

.drill-view-thumb:focus-visible {
    outline: 2px solid var(--et-secondary);
    outline-offset: 2px;
}

.drill-view-thumb-counter {
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--et-on-surface-variant);
    margin-bottom: var(--space-sm);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* ────────────────────────────────────────────────────────────
 * Content sections (Description, Key Points, Notes)
 * ──────────────────────────────────────────────────────────── */
.drill-view-section {
    background: var(--et-surface-container-lowest);
    border-radius: var(--radius-xl, 1rem);
    padding: var(--space-lg) var(--space-xl);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-ambient-sm);
    border-bottom: 4px solid transparent;
    transition: box-shadow 200ms ease, border-color 200ms ease;
}

.drill-view-section:hover {
    border-bottom-color: var(--et-secondary);
}

.drill-view-section-title {
    font-family: var(--font-headline, 'Space Grotesk', sans-serif);
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-transform: uppercase;
    color: var(--et-secondary);
    margin: 0 0 var(--space-sm) 0;
}

.drill-view-prose {
    line-height: 1.7;
    color: var(--et-on-surface);
    font-size: 1rem;
}

.drill-view-prose p { margin: 0 0 0.875em 0; }
.drill-view-prose p:last-child { margin-bottom: 0; }
.drill-view-prose ul, .drill-view-prose ol { margin: 0 0 0.875em 1.5em; }
.drill-view-prose li { margin-bottom: 0.375em; }
.drill-view-prose strong { font-weight: 700; color: var(--et-on-surface); }
.drill-view-prose a {
    color: var(--et-secondary);
    text-decoration: underline;
    text-underline-offset: 2px;
}
.drill-view-prose a:hover {
    color: var(--et-secondary-container);
}

/* ────────────────────────────────────────────────────────────
 * Metadata footer
 * ──────────────────────────────────────────────────────────── */
.drill-view-meta {
    background: var(--et-surface-container-low);
    border-radius: var(--radius-xl, 1rem);
    padding: var(--space-lg) var(--space-xl);
    margin-top: var(--space-2xl);
    font-size: 0.875rem;
    color: var(--et-on-surface-variant);
}

.drill-view-meta-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid color-mix(in srgb, var(--et-on-surface-variant) 10%, transparent);
}

.drill-view-meta-row:last-child { border-bottom: none; }

.drill-view-meta-row strong {
    font-weight: 600;
    color: var(--et-on-surface);
}

.drill-view-meta-icon {
    color: var(--et-secondary);
    width: 1rem;
    text-align: center;
    flex-shrink: 0;
}

.drill-view-meta-muted {
    color: var(--et-on-surface-variant);
    font-size: 0.8125rem;
}

/* Tag chips — color-mix pattern from /assets/css/tags.css */
.drill-view-tag {
    display: inline-flex;
    align-items: center;
    padding: 0.1875rem 0.625rem;
    border-radius: var(--radius-full, 9999px);
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: 0.01em;
}

/* ────────────────────────────────────────────────────────────
 * Email modal
 * ──────────────────────────────────────────────────────────── */
.drill-email-modal {
    position: fixed;
    inset: 0;
    z-index: 60;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
}

.drill-email-modal[hidden] { display: none; }

.drill-email-modal-backdrop {
    position: absolute;
    inset: 0;
    background: color-mix(in srgb, var(--et-primary) 70%, transparent);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.drill-email-modal-dialog {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 480px;
    background: var(--et-surface-container-lowest);
    border-radius: var(--radius-xl, 1rem);
    padding: var(--space-lg) var(--space-xl);
    box-shadow: var(--shadow-ambient-lg);
}

.drill-email-modal-dialog h3 {
    font-family: var(--font-headline, 'Space Grotesk', sans-serif);
    margin: 0 0 var(--space-md) 0;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--et-on-surface);
}

.drill-email-modal-dialog label {
    display: block;
    margin: var(--space-sm) 0 0.25rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--et-on-surface-variant);
}

.drill-email-modal-dialog input[type="email"],
.drill-email-modal-dialog textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--et-surface-container-high);
    border-radius: var(--radius-md, 0.5rem);
    font-size: 0.9375rem;
    font-family: inherit;
    background: var(--et-surface);
    color: var(--et-on-surface);
    transition: border-color 150ms ease, box-shadow 150ms ease;
}

.drill-email-modal-dialog input[type="email"]:focus,
.drill-email-modal-dialog textarea:focus {
    outline: none;
    border-color: var(--et-secondary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--et-secondary) 20%, transparent);
}

.drill-email-modal-dialog textarea {
    resize: vertical;
    min-height: 80px;
}

.drill-email-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

/* ────────────────────────────────────────────────────────────
 * Responsive
 * ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .drill-view-container {
        padding: var(--space-md);
    }

    .drill-view-header {
        flex-direction: column;
        align-items: stretch;
    }

    .drill-view-actions {
        justify-content: flex-start;
    }

    .drill-view-section {
        padding: var(--space-md);
    }

    .drill-view-meta {
        padding: var(--space-md);
    }

    .drill-view-tab {
        padding: 0.75rem 0.875rem;
        font-size: 0.875rem;
    }

    .drill-view-thumb {
        width: 4.5rem;
        height: 4.5rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .drill-view-action-btn,
    .drill-view-thumb,
    .drill-view-section {
        transition: none;
    }
    .drill-view-action-btn:hover,
    .drill-view-thumb:hover {
        transform: none;
    }
}