/* Shared KhomDev site shell — secondary pages + consistent nav/footer */
:root {
    --bg: #0a0a0a;
    --surface: #111111;
    --surface-2: #181818;
    --border: #222222;
    --border-dim: #1a1a1a;
    --text: #e8e8e8;
    --text-muted: #888888;
    --text-dim: #555555;
    --accent: #00E5CC;
    --accent-dim: rgba(0, 229, 204, 0.08);
    --warm: #D9772B;
    --warm-dim: rgba(217, 119, 43, 0.10);
    --font-display: 'Fragment Mono', monospace;
    --font-body: 'DM Sans', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --fs-h2: clamp(1.9rem, 3.5vw, 2.6rem);
    --fs-lead: clamp(1.05rem, 1.6vw, 1.35rem);
    --container-max: 1200px;
    --section-gap: clamp(4rem, 8vw, 7rem);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
    font-family: var(--font-body);
    color: var(--text);
    line-height: 1.65;
    letter-spacing: 0.01em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul { list-style: none; }
h1, h2 { font-family: var(--font-display); font-weight: 400; letter-spacing: -0.02em; }
h3 { font-family: var(--font-body); font-weight: 500; }
:focus-visible { outline: 2px solid var(--warm); outline-offset: 3px; border-radius: 2px; }

.container { max-width: var(--container-max); margin: 0 auto; padding: 0 2rem; }

nav {
    position: fixed; top: 0; width: 100%; z-index: 1000;
    padding: 1.5rem 0;
    background: rgba(10, 10, 10, 0.88);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-dim);
    transition: padding var(--transition);
}
nav.scrolled { padding: 0.85rem 0; }
.nav-inner { display: flex; justify-content: space-between; align-items: center; }
.logo {
    font-family: var(--font-display); font-size: 1.25rem; color: var(--accent);
    display: flex; align-items: center; gap: 0.5rem;
}
.nav-right { display: flex; align-items: center; gap: 1.75rem; }
.nav-links { display: flex; gap: 1.4rem; flex-wrap: wrap; }
.nav-links a {
    font-family: var(--font-display); font-size: 0.82rem; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: 0.04em; white-space: nowrap;
}
.nav-links a:hover, .nav-links a.is-active { color: var(--warm); }
.nav-cta {
    font-family: var(--font-display); font-size: 0.85rem; padding: 0.55rem 1.25rem;
    background: var(--warm); color: var(--bg); border: 1px solid var(--warm); border-radius: 4px;
}
.nav-cta:hover { background: transparent; color: var(--warm); }
.mobile-menu-btn { display: none; background: none; border: none; color: var(--text); cursor: pointer; }

.mobile-nav {
    position: fixed; inset: 0; background: var(--bg); z-index: 999;
    display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 2rem;
    transform: translateY(-100%); transition: transform 0.3s ease;
}
.mobile-nav.active { transform: translateY(0); }
.mobile-nav a { font-family: var(--font-display); font-size: 1.35rem; text-transform: uppercase; padding: 0.5rem 1rem; }

.page-main { padding-top: 7.5rem; padding-bottom: var(--section-gap); }
.page-hero { margin-bottom: 3rem; max-width: 780px; }
.section-label {
    font-family: var(--font-display); color: var(--text-dim); font-size: 0.8rem;
    text-transform: uppercase; letter-spacing: 0.2em; display: block; margin-bottom: 1rem;
}
.page-hero h1 { font-size: clamp(2.4rem, 5.5vw, 3.8rem); line-height: 1.06; margin-bottom: 1.25rem; }
.page-lead { color: var(--text-muted); font-size: var(--fs-lead); max-width: 62ch; }

.card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.card-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card {
    background: var(--surface); border: 1px solid var(--border);
    padding: 1.5rem 1.6rem; display: flex; flex-direction: column; gap: 0.65rem;
    transition: var(--transition);
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card-tag {
    font-family: var(--font-display); font-size: 0.72rem; color: var(--warm);
    text-transform: uppercase; letter-spacing: 0.08em;
}
.card h2 { font-size: 1.25rem; line-height: 1.25; }
.card p { color: var(--text-muted); font-size: 0.95rem; }
.card-link {
    margin-top: auto; font-family: var(--font-display); font-size: 0.82rem; color: var(--accent);
}
.card-link:hover { color: var(--warm); }

.section-block { margin-top: var(--section-gap); }
.section-block h2 { font-size: var(--fs-h2); margin-bottom: 1rem; }
.section-block > p { color: var(--text-muted); max-width: 66ch; margin-bottom: 1.5rem; }

.inset-panel {
    border-left: 2px solid var(--accent); background: var(--accent-dim);
    padding: 1.25rem 1.4rem; margin: 1.5rem 0;
}
.inset-panel p { color: var(--text); font-size: 0.95rem; line-height: 1.7; }

.faq-list { display: flex; flex-direction: column; gap: 0.75rem; margin-top: 2rem; }
.faq-item {
    background: var(--surface); border: 1px solid var(--border); padding: 0;
}
.faq-item summary {
    cursor: pointer; font-family: var(--font-display); font-size: 1rem;
    padding: 1.1rem 1.25rem; list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item p { color: var(--text-muted); padding: 0 1.25rem 1.15rem; font-size: 0.95rem; }

.process-steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; margin-top: 1.5rem; }
.process-step {
    background: var(--surface); border: 1px solid var(--border); padding: 1.35rem;
}
.process-step .num { font-family: var(--font-display); color: var(--accent); font-size: 1.1rem; }
.process-step h3 { font-size: 1.05rem; margin: 0.4rem 0; }
.process-step p { color: var(--text-muted); font-size: 0.9rem; }

.btn-row { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 2.5rem; }
.btn {
    font-family: var(--font-display); font-size: 0.9rem; padding: 0.8rem 1.6rem;
    border: 1px solid var(--border); display: inline-flex; align-items: center; gap: 0.5rem;
}
.btn-primary { background: var(--warm); color: var(--bg); border-color: var(--warm); }
.btn-primary:hover { background: transparent; color: var(--warm); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.disclaimer {
    font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-dim);
    margin-top: 2rem; padding-top: 1.25rem; border-top: 1px solid var(--border-dim);
}

footer {
    padding: 3.5rem 0; border-top: 1px solid var(--border-dim);
    margin-top: 2rem;
}
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 2rem; flex-wrap: wrap; }
.copyright { font-family: var(--font-display); color: var(--text-dim); font-size: 0.9rem; }
.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.footer-links a {
    font-family: var(--font-display); font-size: 0.78rem; color: var(--text-muted); text-transform: uppercase;
}
.footer-links a:hover { color: var(--accent); }
.footer-pay {
    display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; justify-content: center;
    font-family: var(--font-mono); font-size: 0.76rem; color: var(--text-muted);
    margin-top: 1.5rem; padding-top: 1.25rem; border-top: 1px solid var(--border-dim);
}
.footer-pay code { color: var(--text); }
.kh-pay-mini-copy {
    font-family: var(--font-mono); font-size: 0.68rem; background: transparent; color: var(--accent);
    border: 1px solid var(--accent); border-radius: 6px; padding: 3px 9px; cursor: pointer;
}

i[data-lucide] { display: inline-flex; }
i[data-lucide] > svg { width: 1em; height: 1em; }

@media (max-width: 900px) {
    .card-grid, .card-grid.three, .process-steps { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .nav-links { display: none; }
    .mobile-menu-btn { display: block; }
    .nav-cta { display: none; }
    .footer-inner { flex-direction: column; text-align: center; justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
    .card:hover { transform: none; }
}