/* ============================================
   Reset & Tokens
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg:           #080808;
    --bg-card:      #101010;
    --bg-elevated:  #141414;

    --fg:           #f0f0f0;
    --fg-muted:     #888888;
    --fg-subtle:    #2a2a2a;

    --border:       rgba(255,255,255,0.07);
    --border-hover: rgba(255,255,255,0.18);

    --accent:       #e8ff47;
    --accent-dim:   rgba(232,255,71,0.08);

    --radius-sm:    6px;
    --radius-md:    10px;
    --radius-lg:    16px;

    --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;
    --font-mono:    'SF Mono', 'Menlo', 'Consolas', monospace;

    --ease-expo:    cubic-bezier(0.16, 1, 0.3, 1);

    --topbar-h:     60px;
    --wall-gap:     12px;
    --wall-cols:    4;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--fg);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   Noise Layer
   ============================================ */
.noise-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    opacity: 0.028;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='1.5' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ============================================
   Top Bar
   ============================================ */
.topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 200;
    height: var(--topbar-h);
    background: rgba(8,8,8,0.88);
    backdrop-filter: blur(24px) saturate(1.4);
    -webkit-backdrop-filter: blur(24px) saturate(1.4);
    border-bottom: 1px solid var(--border);
}

.topbar-inner {
    max-width: 1800px;
    margin: 0 auto;
    height: 100%;
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Brand */
.topbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-icon {
    width: 20px;
    height: 20px;
    color: var(--accent);
    flex-shrink: 0;
}

.brand-name {
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--fg);
}

.brand-sep {
    color: var(--fg-subtle);
    font-size: 16px;
}

.brand-sub {
    font-size: 11px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--fg-muted);
}

/* Controls */
.topbar-controls {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Search Trigger Button */
.search-trigger {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--fg-muted);
    cursor: pointer;
    transition: color 0.25s, border-color 0.25s;
    flex-shrink: 0;
}

.search-trigger:hover {
    color: var(--fg);
    border-color: var(--border-hover);
}

.search-trigger svg {
    width: 15px;
    height: 15px;
}

/* GitHub */
.github-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--fg-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: color 0.25s, border-color 0.25s;
    flex-shrink: 0;
}

.github-link:hover {
    color: var(--fg);
    border-color: var(--border-hover);
}

.github-link svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   Search Overlay
   ============================================ */
.search-overlay {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: none;
}

.search-overlay.active {
    display: block;
}

.search-overlay-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: fadein 0.2s ease;
}

.search-overlay-inner {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-hover);
    display: flex;
    align-items: center;
    padding: 0 28px;
    gap: 16px;
    animation: slidedown 0.3s var(--ease-expo);
}

@keyframes slidedown {
    from { transform: translateY(-100%); opacity: 0; }
    to   { transform: translateY(0); opacity: 1; }
}

.search-overlay-inner svg {
    width: 18px;
    height: 18px;
    color: var(--fg-muted);
    flex-shrink: 0;
}

.search-overlay-inner input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    font-family: var(--font-sans);
    font-size: 18px;
    font-weight: 400;
    color: var(--fg);
    caret-color: var(--accent);
}

.search-overlay-inner input::placeholder {
    color: var(--fg-muted);
}

.search-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--fg-muted);
    cursor: pointer;
    transition: color 0.25s, border-color 0.25s;
    flex-shrink: 0;
}

.search-close:hover {
    color: var(--fg);
    border-color: var(--border-hover);
}

.search-close svg {
    width: 15px;
    height: 15px;
}

/* ============================================
   Hero Banner
   ============================================ */
.hero-banner {
    margin-top: var(--topbar-h);
    padding: 88px 28px 72px;
    border-bottom: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

/* Grid decoration */
.hero-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.012) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.012) 1px, transparent 1px);
    background-size: 80px 80px;
    pointer-events: none;
}

.hero-banner-inner {
    max-width: 1800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-eyebrow {
    margin-bottom: 28px;
}

.eyebrow-tag {
    font-size: 10px;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-dim);
    border: 1px solid rgba(232,255,71,0.2);
    padding: 4px 10px;
    border-radius: 3px;
}

.hero-heading {
    font-family: var(--font-display);
    font-size: clamp(64px, 9vw, 140px);
    font-weight: 700;
    line-height: 0.95;
    letter-spacing: -0.03em;
    color: var(--fg);
}

.hero-heading em {
    font-style: normal;
    -webkit-text-stroke: 2px var(--fg);
    color: transparent;
}

/* Stamp — case count bottom right */
.hero-stamp {
    position: absolute;
    right: 28px;
    bottom: 24px;
    font-size: 10px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--fg-muted);
    z-index: 1;
}

/* ============================================
   Filter Bar — Tag Pills
   ============================================ */
.filter-bar {
    position: sticky;
    top: var(--topbar-h);
    z-index: 100;
    background: rgba(8,8,8,0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.filter-bar-inner {
    max-width: 1800px;
    margin: 0 auto;
    padding: 14px 28px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-pill {
    padding: 6px 18px;
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 100px;
    color: var(--fg-muted);
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
    white-space: nowrap;
    flex-shrink: 0;
}

.filter-pill:hover {
    border-color: var(--border-hover);
    color: var(--fg);
}

.filter-pill.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #000;
    font-weight: 600;
}

/* ============================================
   Masonry Wall
   ============================================ */
.wall-section {
    max-width: 1800px;
    margin: 0 auto;
    padding: 24px 28px 60px;
}

.masonry-wall {
    columns: var(--wall-cols);
    column-gap: var(--wall-gap);
}

/* ============================================
   Gallery Card
   ============================================ */
.gallery-card {
    break-inside: avoid;
    margin-bottom: var(--wall-gap);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: border-color 0.3s ease, transform 0.4s var(--ease-expo), box-shadow 0.4s ease;
    display: block;
}

.gallery-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px -16px rgba(0,0,0,0.7);
}

/* Image — natural ratio, no crop */
.card-image-wrap {
    position: relative;
    overflow: hidden;
    width: 100%;
    background: var(--bg-elevated);
}

.card-image-wrap img {
    display: block;
    width: 100%;
    height: auto;
    transition: transform 0.7s var(--ease-expo), filter 0.5s ease;
    filter: brightness(0.92);
}

.gallery-card:hover .card-image-wrap img {
    transform: scale(1.04);
    filter: brightness(1);
}

/* Gradient overlay on hover */
.card-image-wrap::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,0.5) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.gallery-card:hover .card-image-wrap::after {
    opacity: 1;
}

/* View hint */
.card-view-hint {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.7);
    opacity: 0;
    transition: opacity 0.35s ease, transform 0.35s var(--ease-expo);
    z-index: 2;
    background: rgba(232,255,71,0.92);
    color: #000;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    padding: 7px 14px;
    border-radius: 3px;
    pointer-events: none;
    white-space: nowrap;
}

.gallery-card:hover .card-view-hint {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

/* Card Body */
.card-body {
    padding: 16px 18px 18px;
}

.card-meta-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.card-num {
    font-family: var(--font-display);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--fg-muted);
}

.card-cat-tag {
    font-size: 9px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-dim);
    border: 1px solid rgba(232,255,71,0.15);
    padding: 2px 8px;
    border-radius: 2px;
}

.card-title {
    font-size: 13px;
    font-weight: 500;
    color: var(--fg);
    margin-bottom: 8px;
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-prompt-preview {
    font-family: var(--font-mono);
    font-size: 11px;
    line-height: 1.7;
    color: var(--fg-muted);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================
   Empty State
   ============================================ */
.empty-state {
    padding: 100px 40px;
    text-align: center;
    border: 1px dashed var(--border);
    border-radius: var(--radius-lg);
    color: var(--fg-muted);
}

.empty-state svg {
    width: 40px;
    height: 40px;
    margin: 0 auto 24px;
    opacity: 0.3;
}

.empty-state h3 {
    font-family: var(--font-display);
    font-size: 15px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 10px;
    color: var(--fg);
}

.empty-state p {
    font-size: 13px;
    color: var(--fg-muted);
}

/* ============================================
   Modal
   ============================================ */
.modal {
    position: fixed;
    inset: 0;
    z-index: 500;
    display: none;
}

.modal.active {
    display: block;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.92);
    animation: fadein 0.3s ease;
    cursor: pointer;
}

@keyframes fadein {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.modal-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: 1fr 500px;
    animation: slideup 0.5s var(--ease-expo);
    pointer-events: none;
}

.modal-content > * {
    pointer-events: all;
}

@keyframes slideup {
    from { opacity: 0; transform: translateY(40px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Modal Left */
.modal-left {
    background: #0c0c0c;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-img-wrap {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px;
    overflow: hidden;
}

.modal-img-wrap img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--radius-sm);
    box-shadow: 0 40px 100px -30px rgba(0,0,0,0.9);
    animation: zoomin 0.6s var(--ease-expo);
}

@keyframes zoomin {
    from { transform: scale(0.94); opacity: 0; }
    to   { transform: scale(1); opacity: 1; }
}

.modal-img-footer {
    padding: 18px 32px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.modal-case-num {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--fg-muted);
}

.modal-src-tag {
    font-size: 10px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--fg-muted);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    padding: 3px 10px;
    border-radius: 3px;
}

/* Modal Right */
.modal-right {
    background: var(--bg);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--fg-muted);
    cursor: pointer;
    z-index: 10;
    transition: background 0.25s, border-color 0.25s, color 0.25s;
    flex-shrink: 0;
}

.modal-close:hover {
    background: var(--fg);
    border-color: var(--fg);
    color: var(--bg);
}

.modal-close svg {
    width: 15px;
    height: 15px;
}

.modal-body {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

/* Title block — 右侧留出关闭按钮空间 */
.modal-title-block {
    padding: 28px 72px 24px 32px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.modal-label {
    font-size: 9px;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--fg-muted);
    margin-bottom: 10px;
}

.modal-title-block h2 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 500;
    line-height: 1.4;
    color: var(--fg);
}

/* Prompt block */
.modal-prompt-block {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
    padding: 24px 32px 32px;
}

.prompt-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    flex-shrink: 0;
}

.prompt-tag {
    font-size: 9px;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--accent);
}

/* Copy Button */
.copy-btn {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 7px 14px;
    background: var(--fg);
    color: var(--bg);
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.copy-btn:hover {
    background: #d4e93a;
    transform: translateY(-1px);
}

.copy-btn:active {
    transform: translateY(0);
}

.copy-btn.copied {
    background: #3adc78;
    color: #000;
}

.copy-btn svg {
    width: 13px;
    height: 13px;
    flex-shrink: 0;
}

.copy-btn .check-icon { display: none; }
.copy-btn.copied .copy-icon { display: none; }
.copy-btn.copied .check-icon { display: block; }

/* Prompt scroll area */
.prompt-scroll {
    flex: 1;
    overflow-y: auto;
    padding-right: 4px;
}

.prompt-text {
    font-family: var(--font-mono);
    font-size: 12.5px;
    line-height: 1.95;
    color: var(--fg-muted);
    white-space: pre-wrap;
    word-break: break-word;
}

.prompt-scroll::-webkit-scrollbar { width: 4px; }
.prompt-scroll::-webkit-scrollbar-track { background: transparent; }
.prompt-scroll::-webkit-scrollbar-thumb { background: var(--fg-subtle); border-radius: 4px; }
.prompt-scroll::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1400px) {
    :root { --wall-cols: 3; }
}

@media (max-width: 1000px) {
    :root { --wall-cols: 2; }

    .modal-content {
        grid-template-columns: 1fr;
        grid-template-rows: 55% 45%;
    }

    .modal-right {
        border-left: none;
        border-top: 1px solid var(--border);
    }
}

@media (max-width: 700px) {
    :root { --wall-cols: 1; }

    .topbar-inner { padding: 0 16px; }
    .brand-sub { display: none; }
    .brand-sep { display: none; }

    .hero-banner { padding: 56px 16px 48px; }
    .hero-heading { font-size: clamp(48px, 14vw, 80px); }
    .hero-heading em { -webkit-text-stroke: 0; color: var(--accent); }
    .hero-stamp { right: 16px; }

    .filter-bar-inner { padding: 12px 16px; }

    .wall-section { padding: 16px 16px 40px; }

    .search-overlay-inner { padding: 0 16px; }
    .search-overlay-inner input { font-size: 16px; }

    .modal-content {
        grid-template-rows: 42% 58%;
    }

    .modal-img-wrap { padding: 24px; }

    .modal-title-block { padding: 20px 64px 16px 20px; }
    .modal-prompt-block { padding: 16px 20px 20px; }
}

/* ============================================
   Global Scrollbar
   ============================================ */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #222; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #333; }