/* =========================================================================
   PUCO shared stylesheet
   Depends on themes.css (CSS custom properties).
   ========================================================================= */

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); text-decoration: none; transition: color 0.18s ease; }
a:hover { color: var(--accent-light); }

img, svg, video { display: block; max-width: 100%; height: auto; }

h1, h2, h3, h4, h5, h6 { line-height: 1.2; font-weight: 700; color: var(--text); }
h1 { font-size: clamp(2rem, 4.5vw, 3.5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); letter-spacing: -0.015em; margin-bottom: 0.5em; }
h3 { font-size: 1.25rem; letter-spacing: -0.01em; }

p { color: var(--text); }

code, kbd, pre { font-family: var(--mono); font-size: 0.92em; }

/* Layout container */
.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 860px; }

/* Section spacing */
.section { padding: 80px 0; position: relative; }
.section--tight { padding: 56px 0; }
.section-head { text-align: center; margin-bottom: 48px; }
.section-head .eyebrow {
    display: inline-block; padding: 4px 12px; margin-bottom: 14px;
    font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.14em;
    color: var(--accent-light); background: var(--accent-glow); border-radius: 999px;
}
.section-head h2 { margin-bottom: 12px; }
.section-head p { color: var(--text-muted); max-width: 640px; margin: 0 auto; }

/* ── Nav ────────────────────────────────────────────────────────────────── */
.nav {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in srgb, var(--bg) 92%, transparent);
    backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
}
.nav-inner {
    display: flex; align-items: center; justify-content: space-between;
    gap: 24px; padding: 14px 24px; max-width: 1160px; margin: 0 auto;
}
.nav-brand {
    display: flex; align-items: center; gap: 10px;
    font-weight: 800; font-size: 1.05rem; color: var(--text); letter-spacing: 0.02em;
}
.nav-brand:hover { color: var(--text); }
.nav-brand img { width: 28px; height: 28px; border-radius: 7px; }
.nav-links { display: flex; align-items: center; gap: 6px; list-style: none; }
.nav-link {
    padding: 8px 14px; border-radius: 8px; font-size: 0.92rem;
    color: var(--text-muted); font-weight: 500;
}
.nav-link:hover { color: var(--text); background: var(--surface-hover); }
.nav-cta {
    padding: 9px 16px; border-radius: 10px; font-size: 0.92rem; font-weight: 600;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
    color: #1a0f00; border: 1px solid transparent;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 8px 22px var(--accent-glow); color: #1a0f00; }

@media (max-width: 780px) {
    .nav-links .nav-link { display: none; }
    .nav-links .nav-link--mobile,
    .nav-links .nav-cta { display: inline-flex; }
}

/* ── Buttons ────────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 22px; border-radius: 12px; font-weight: 600; font-size: 0.96rem;
    border: 1px solid var(--border); background: var(--surface); color: var(--text);
    cursor: pointer; transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
    text-decoration: none;
}
.btn:hover { transform: translateY(-1px); background: var(--surface-hover); }
.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
    color: #1a0f00; border-color: transparent;
}
.btn-primary:hover { color: #1a0f00; box-shadow: 0 12px 28px var(--accent-glow); background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%); filter: brightness(1.12); }
.btn-secondary { background: transparent; border-color: var(--accent); color: var(--accent); }
.btn-secondary:hover { background: var(--accent-glow); color: var(--accent-light); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text-muted); }
.btn-ghost:hover { color: var(--text); border-color: var(--accent); }

/* ── Hero ───────────────────────────────────────────────────────────────── */
.hero {
    padding: 88px 0 72px;
    background:
        radial-gradient(ellipse 900px 400px at 50% -10%, var(--accent-glow), transparent 60%),
        radial-gradient(ellipse 600px 300px at 10% 110%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 60%);
}
.hero-inner { text-align: center; max-width: 860px; margin: 0 auto; padding: 0 24px; }
.hero-badge {
    display: inline-block; padding: 6px 14px; margin-bottom: 20px;
    background: var(--accent-glow); border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
    border-radius: 999px; font-size: 0.82rem; color: var(--accent-light); font-weight: 600;
}
.hero h1 {
    white-space: pre-line;
    background: linear-gradient(135deg, var(--text) 20%, var(--accent-light) 90%);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
    margin-bottom: 18px;
}
.hero-subtitle { font-size: clamp(1.05rem, 1.8vw, 1.25rem); color: var(--text-muted); margin-bottom: 28px; }
.hero-cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-tertiary { margin-top: 18px; font-size: 0.9rem; color: var(--text-muted); }
.hero-tertiary a { color: var(--accent-light); }

.stat-row { display: flex; gap: 48px; justify-content: center; margin-top: 48px; flex-wrap: wrap; }
.stat { text-align: center; text-decoration: none; transition: transform 0.18s ease; display: block; }
.stat:hover { transform: translateY(-3px); }
.stat:hover .stat-num { filter: brightness(1.2); }
.stat-num { font-size: 2rem; font-weight: 800; color: var(--accent); transition: filter 0.18s ease; }
.stat-label { font-size: 0.82rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.12em; }

/* ── Cards (shared: prompt / category / philosophy / feature / reason) ──── */
.card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 26px; transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
.card:hover {
    transform: translateY(-3px); border-color: var(--accent);
    background: var(--surface-hover);
}
.card-title { font-size: 1.1rem; margin-bottom: 10px; color: var(--text); }
.card-body  { color: var(--text-muted); font-size: 0.94rem; line-height: 1.55; }
.card-icon {
    width: 44px; height: 44px; border-radius: 10px; margin-bottom: 16px;
    background: var(--accent-glow); color: var(--accent);
    display: inline-flex; align-items: center; justify-content: center; font-size: 1.2rem;
}

.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card--highlight { border-color: color-mix(in srgb, var(--accent) 60%, var(--border)); background: color-mix(in srgb, var(--accent-glow) 80%, var(--surface)); }

/* ── Prompt / category cards ───────────────────────────────────────────── */
.prompt-card, .category-card {
    display: flex; flex-direction: column; gap: 10px;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 22px; transition: transform 0.18s ease, border-color 0.18s ease;
    color: inherit;
}
.prompt-card:hover, .category-card:hover { transform: translateY(-2px); border-color: var(--accent); color: inherit; }
.prompt-card h3, .category-card h3 { color: var(--text); }
.prompt-card p, .category-card p { color: var(--text-muted); font-size: 0.92rem; }
.category-card .count { margin-top: auto; font-size: 0.82rem; color: var(--accent); font-weight: 600; }

.chip {
    display: inline-block; padding: 3px 10px; border-radius: 999px;
    font-size: 0.75rem; color: var(--accent-light); background: var(--accent-glow);
    border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}

/* ── Breadcrumb ─────────────────────────────────────────────────────────── */
.breadcrumb {
    display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
    font-size: 0.85rem; color: var(--text-muted); margin: 28px 0 12px;
    padding: 0 24px; max-width: 1160px; margin-left: auto; margin-right: auto;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--border); }

/* ── Share row ──────────────────────────────────────────────────────────── */
.share-row {
    display: flex; gap: 12px; align-items: flex-start;
    margin: 28px 0; padding: 14px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.share-row-label { flex-shrink: 0; font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.1em; padding-top: 9px; }
.share-btns { display: flex; flex-wrap: wrap; gap: 8px; }
.share-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 8px 12px; border-radius: 9px; background: var(--surface); border: 1px solid var(--border);
    color: var(--text-muted); font-size: 0.85rem; cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.share-btn:hover { background: var(--surface-hover); color: var(--text); border-color: var(--accent); }
.share-btn.copied { color: var(--success); border-color: var(--success); }

/* ── Gallery ────────────────────────────────────────────────────────────── */
.gallery-tabs { display: flex; gap: 8px; justify-content: center; margin-bottom: 28px; flex-wrap: wrap; }
.gallery-tab {
    padding: 8px 18px; border-radius: 999px; border: 1px solid var(--border);
    background: var(--surface); color: var(--text-muted); cursor: pointer;
    font-size: 0.9rem; font-weight: 500;
}
.gallery-tab.is-active { background: var(--accent-glow); color: var(--accent-light); border-color: var(--accent); }
.gallery-grid {
    display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}
.gallery-grid img {
    border-radius: 12px; border: 1px solid var(--border);
    background: var(--surface); object-fit: cover; aspect-ratio: 16/10;
}
.gallery-pane { display: none; }
.gallery-pane.is-active { display: block; animation: fadeUp 0.3s ease; }

/* ── Use cases tabs ────────────────────────────────────────────────────── */
.tab-row { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin-bottom: 24px; }
.tab-btn {
    padding: 9px 18px; border-radius: 999px; border: 1px solid var(--border);
    background: transparent; color: var(--text-muted); cursor: pointer; font-weight: 500;
}
.tab-btn.is-active { background: var(--accent-glow); color: var(--accent-light); border-color: var(--accent); }
.tab-pane { display: none; }
.tab-pane.is-active { display: block; animation: fadeUp 0.3s ease; }

.use-case {
    max-width: 760px; margin: 0 auto; background: var(--surface);
    border: 1px solid var(--border); border-radius: var(--radius); padding: 32px;
}
.use-case h3 { font-size: 1.4rem; margin-bottom: 12px; }
.use-case p  { color: var(--text-muted); margin-bottom: 20px; }
.use-case blockquote {
    padding: 14px 18px; border-left: 3px solid var(--accent); color: var(--text);
    background: var(--accent-glow); border-radius: 0 10px 10px 0;
    font-style: italic; font-size: 0.96rem;
}

/* ── Comparison table ──────────────────────────────────────────────────── */
.compare-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.compare { width: 100%; border-collapse: collapse; font-size: 0.92rem; min-width: 560px; }
.compare th, .compare td { padding: 14px 16px; text-align: center; border-bottom: 1px solid var(--border); }
.compare th { background: var(--surface-hover); color: var(--text); font-weight: 600; }
.compare th:first-child, .compare td:first-child { text-align: left; color: var(--text-muted); }
.compare tr:last-child td { border-bottom: none; }
.compare .col-puco { background: var(--accent-glow); color: var(--accent-light); font-weight: 600; }

/* ── FAQ (using <details>) ─────────────────────────────────────────────── */
.faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item {
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    padding: 0; overflow: hidden;
}
.faq-item summary {
    padding: 16px 20px; cursor: pointer; font-weight: 600; color: var(--text);
    list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: "+"; color: var(--accent); font-size: 1.4rem; line-height: 1; transition: transform 0.2s ease;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding: 0 20px 18px; color: var(--text-muted); font-size: 0.95rem; }

/* ── Newsletter ────────────────────────────────────────────────────────── */
.newsletter-form {
    display: flex; gap: 10px; max-width: 520px; margin: 22px auto 0; flex-wrap: wrap;
}
.newsletter-form input[type="email"] {
    flex: 1 1 220px; min-width: 0; padding: 12px 16px; border-radius: 10px;
    background: var(--surface); border: 1px solid var(--border); color: var(--text);
    font: inherit;
}
.newsletter-form input[type="email"]:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.newsletter-msg { margin-top: 10px; font-size: 0.88rem; color: var(--text-muted); min-height: 1.2em; }
.newsletter-msg.is-ok { color: var(--success); }
.newsletter-msg.is-err { color: var(--danger); }

/* ── CTA banner ────────────────────────────────────────────────────────── */
.cta-banner {
    margin: 48px auto; max-width: 980px; padding: 48px 32px; text-align: center;
    border-radius: calc(var(--radius) + 6px);
    background:
        linear-gradient(135deg, color-mix(in srgb, var(--accent) 18%, var(--surface)) 0%, var(--surface) 100%);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border));
}
.cta-banner h2 { margin-bottom: 10px; }
.cta-banner p  { color: var(--text-muted); margin-bottom: 22px; max-width: 620px; margin-left: auto; margin-right: auto; }

/* ── Footer ────────────────────────────────────────────────────────────── */
.footer {
    margin-top: 80px; border-top: 1px solid var(--border);
    background: var(--surface); color: var(--text-muted);
    padding: 36px 0 28px;
}
.footer-inner {
    max-width: 1160px; margin: 0 auto; padding: 0 24px;
    display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: center;
}
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-links a { color: var(--text-muted); font-size: 0.9rem; }
.footer-links a:hover { color: var(--accent); }
.footer-copy { font-size: 0.85rem; color: var(--text-muted); }

/* Theme picker (three swatches) */
.theme-picker { display: inline-flex; gap: 6px; align-items: center; }
.theme-picker .lbl { font-size: 0.78rem; color: var(--text-muted); margin-right: 4px; text-transform: uppercase; letter-spacing: 0.1em; }
.theme-swatch {
    width: 24px; height: 24px; border-radius: 50%; border: 1px solid var(--border);
    cursor: pointer; padding: 0; position: relative;
    transition: transform 0.15s ease, border-color 0.15s ease;
}
.theme-swatch:hover { transform: scale(1.08); border-color: var(--accent); }
.theme-swatch[aria-pressed="true"] { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-glow); }
.theme-swatch[data-theme="warm"]    { background: linear-gradient(135deg, #15110c 0%, #f59e0b 100%); }
.theme-swatch[data-theme="neutral"] { background: linear-gradient(135deg, #0d0f14 0%, #f59e0b 100%); }
.theme-swatch[data-theme="light"]   { background: linear-gradient(135deg, #fdf6e3 0%, #d97706 100%); }
.theme-swatch[data-theme="emerald"] { background: linear-gradient(135deg, #0a140f 0%, #10b981 100%); }
.theme-swatch[data-theme="red"]     { background: linear-gradient(135deg, #140a0a 0%, #ef4444 100%); }

/* ── Animations ────────────────────────────────────────────────────────── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.fade-up { animation: fadeUp 0.5s ease; }

/* ── Utilities ─────────────────────────────────────────────────────────── */
.muted { color: var(--text-muted); }
.accent { color: var(--accent); }
.center { text-align: center; }
.mt-s { margin-top: 8px; }  .mt-m { margin-top: 16px; } .mt-l { margin-top: 32px; }
.mb-s { margin-bottom: 8px; } .mb-m { margin-bottom: 16px; } .mb-l { margin-bottom: 32px; }
.flex { display: flex; } .flex-wrap { flex-wrap: wrap; } .gap-s { gap: 8px; } .gap-m { gap: 16px; }
.text-sm { font-size: 0.88rem; }