/* ── Slides ── */

.slide {
    scroll-snap-align: start;
    scroll-snap-stop: always;
    min-height: 100dvh;
    width: 100%;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.slide-inner {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--space-8) var(--space-6);
}

/* ── Shared type ── */

.eyebrow {
    font-size: var(--text-sm);
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-ink-muted);
}

.section-heading {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, var(--text-4xl));
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-ink);
}

.section-sub {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    color: var(--color-ink-muted);
    font-weight: 400;
}

.body-text {
    font-size: var(--text-base);
    color: var(--color-ink-muted);
    line-height: 1.75;
    max-width: 480px;
}

.accent-rule {
    width: 48px;
    height: 3px;
    background: var(--color-accent);
    border-radius: 2px;
}

/* ── Intro slide ── */

#intro {
    background-color: var(--color-base);
}

#intro .slide-inner {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-3);
    min-height: 100dvh;
}

.intro-name {
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 10vw, var(--text-4xl));
    font-weight: 700;
    line-height: 1;
    color: var(--color-ink);
}

.intro-name span {
    color: var(--color-accent);
}

/* ── Category slides ── */

.category-slide .slide-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    align-items: center;
    min-height: 100dvh;
    padding-top: var(--space-8);
    padding-bottom: var(--space-8);
}

/* alternating backgrounds */
.category-slide:nth-of-type(odd) {
    background-color: var(--color-base-alt);
}

.category-slide:nth-of-type(even) {
    background-color: var(--color-base);
}

/* left: text column */
.cat-text {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.cat-meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.cat-date {
    font-size: var(--text-sm);
    color: var(--color-ink-muted);
    letter-spacing: 0.06em;
}

.cat-drawing-title {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--color-accent);
}

/* style description block */
.style-description {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    border-left: 3px solid var(--color-accent);
    background: rgba(75, 58, 140, 0.04);
    border-radius: 0 var(--radius-card) var(--radius-card) 0;
}

.style-description-label {
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
}

.style-description-text {
    font-size: var(--text-sm);
    color: var(--color-ink-muted);
    line-height: 1.7;
}

/* drawing comment block */
.drawing-comment {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.drawing-comment-label {
    font-size: var(--text-xs);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-ink-muted);
}

.drawing-comment-text {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    color: var(--color-ink);
    line-height: 1.5;
}

.cat-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.btn-primary {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    background: var(--color-accent);
    color: var(--color-base);
    border: none;
    border-radius: var(--radius-chip);
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background var(--transition);
}

.btn-primary:hover {
    background: var(--color-accent-soft);
}

/* right: preview column */
.cat-preview {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
}

.preview-frame {
    width: 100%;
    max-width: 360px;
    aspect-ratio: 3/4;
    border-radius: var(--radius-card);
    border: 1.5px solid rgba(75, 58, 140, 0.15);
    overflow: hidden;
    background: #FAFAFA;
    position: relative;
}

.preview-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* placeholder shown when no image is provided */
.preview-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-1);
    color: var(--color-ink-muted);
    font-family: var(--font-display);
    font-size: var(--text-base);
    text-align: center;
    padding: var(--space-3);
    background-image:
        repeating-linear-gradient(
            45deg,
            rgba(75, 58, 140, 0.04) 0px,
            rgba(75, 58, 140, 0.04) 1px,
            transparent 1px,
            transparent 10px
        ),
        repeating-linear-gradient(
            -45deg,
            rgba(75, 58, 140, 0.04) 0px,
            rgba(75, 58, 140, 0.04) 1px,
            transparent 1px,
            transparent 10px
        );
}

.preview-caption {
    font-size: var(--text-xs);
    color: var(--color-ink-muted);
    letter-spacing: 0.06em;
    font-style: italic;
}

/* ── Scroll hint ── */

.scroll-hint {
    position: absolute;
    bottom: var(--space-4);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    opacity: 0.35;
    animation: bounce 2s ease-in-out infinite;
    pointer-events: none;
}

.scroll-hint span {
    font-size: var(--text-xs);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-weight: 500;
}

.scroll-hint-arrow {
    width: 18px;
    height: 18px;
    border-right: 2px solid var(--color-ink);
    border-bottom: 2px solid var(--color-ink);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50%       { transform: translateX(-50%) translateY(6px); }
}

/* ── Responsive ── */

@media (max-width: 700px) {
    .category-slide .slide-inner {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .cat-preview {
        order: -1;
        align-items: center;
    }

    .preview-frame {
        aspect-ratio: 4/3;
        max-width: 100%;
    }

    .slide-inner {
        padding: var(--space-6) var(--space-3);
    }
}

@media (prefers-reduced-motion: reduce) {
    .scroll-hint { animation: none; }
    * { transition: none !important; }
}