/* ============================================
   FaylHub — Design System
   ============================================ */

:root {
  /* Brand */
  --brand: #FF5A1F;
  --brand-600: #E84A0F;
  --brand-700: #C53D08;
  --brand-50: #FFF1EA;
  --brand-100: #FFE0D1;

  /* Ink (dark neutrals) */
  --ink-0: #FFFFFF;
  --ink-50: #FAFAF7;
  --ink-100: #F4F2EC;
  --ink-200: #E8E4DA;
  --ink-300: #D2CCBE;
  --ink-400: #9A958A;
  --ink-500: #6B6A63;
  --ink-600: #3F3E38;
  --ink-700: #25241F;
  --ink-800: #15151A;
  --ink-900: #0B0B10;

  /* Accent */
  --tg: #229ED9;
  --tg-600: #1E89BD;

  /* File type colors */
  --type-pdf: #E03131;
  --type-doc: #2E5BFF;
  --type-ppt: #FF6B2C;
  --type-xls: #1F9D55;

  /* Radii */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-2xl: 36px;
  --r-full: 999px;

  /* Shadows */
  --sh-1: 0 1px 0 rgba(11,11,16,.04), 0 1px 2px rgba(11,11,16,.06);
  --sh-2: 0 4px 10px rgba(11,11,16,.04), 0 12px 28px rgba(11,11,16,.06);
  --sh-3: 0 8px 16px rgba(11,11,16,.06), 0 24px 48px rgba(11,11,16,.10);
  --sh-brand: 0 10px 30px -8px rgba(255,90,31,.55);

  /* Type */
  --font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, sans-serif;

  /* Layout */
  --container: 1240px;
  --grid-gap: 22px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-feature-settings: "ss01","cv11";
  color: var(--ink-800);
  background: var(--ink-50);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Typography ===== */
.display {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 0.98;
}
.eyebrow {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--ink-500);
}
.muted { color: var(--ink-500); }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250,250,247,.78);
  backdrop-filter: saturate(1.4) blur(16px);
  -webkit-backdrop-filter: saturate(1.4) blur(16px);
  border-bottom: 1px solid var(--ink-200);
}
.site-header__row {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: 18px;
}
.brand-mark {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 700; font-size: 22px;
  letter-spacing: -0.02em; color: var(--ink-900);
}
.brand-mark__logo {
  display: inline-flex; align-items: center;
  background: var(--ink-900); color: var(--ink-0);
  padding: 4px 10px 5px; border-radius: 6px; font-size: 18px; letter-spacing: -0.02em;
}
.brand-mark__logo .accent {
  background: var(--brand); color: var(--ink-900);
  padding: 0 6px; border-radius: 3px; margin-left: 2px;
}

.nav-actions { display: flex; align-items: center; gap: 10px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  border-radius: var(--r-md); padding: 10px 16px;
  font-weight: 600; font-size: 14px; line-height: 1;
  border: 1px solid transparent; transition: all .18s ease;
  white-space: nowrap;
}
.btn--ghost { background: transparent; color: var(--ink-700); }
.btn--ghost:hover { background: var(--ink-100); }
.btn--soft { background: var(--ink-100); color: var(--ink-800); border-color: var(--ink-200); }
.btn--soft:hover { background: var(--ink-200); }
.btn--dark { background: var(--ink-900); color: var(--ink-0); }
.btn--dark:hover { background: var(--ink-700); }
.btn--brand { background: var(--brand); color: var(--ink-0); box-shadow: var(--sh-brand); }
.btn--brand:hover { background: var(--brand-600); transform: translateY(-1px); }
.btn--tg { background: var(--tg); color: var(--ink-0); }
.btn--tg:hover { background: var(--tg-600); }
.btn--lg { padding: 14px 22px; font-size: 15px; border-radius: var(--r-lg); }
.btn--xl { padding: 18px 28px; font-size: 16px; border-radius: var(--r-lg); }
.btn .icon { width: 16px; height: 16px; }
.btn--lg .icon, .btn--xl .icon { width: 18px; height: 18px; }

/* Lang picker */
.lang {
  position: relative;
}
.lang__btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--ink-0); border: 1px solid var(--ink-200);
  border-radius: var(--r-md); padding: 9px 12px; font-weight: 600; font-size: 13px; color: var(--ink-700);
}
.lang__btn:hover { background: var(--ink-100); }
.lang__menu {
  position: absolute; right: 0; top: calc(100% + 8px);
  background: var(--ink-0); border: 1px solid var(--ink-200);
  border-radius: var(--r-md); box-shadow: var(--sh-3);
  min-width: 180px; padding: 6px; display: none;
}
.lang.is-open .lang__menu { display: block; }
.lang__item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  border: 0; background: transparent; padding: 9px 10px;
  font-size: 14px; color: var(--ink-700); border-radius: 8px; text-align: left;
}
.lang__item:hover { background: var(--ink-100); }

/* ===== Cards ===== */
.file-card {
  background: var(--ink-0);
  border: 1px solid var(--ink-200);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform .25s cubic-bezier(.2,.7,.2,1), box-shadow .25s, border-color .25s;
  position: relative;
}
.file-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sh-3);
  border-color: var(--ink-300);
}
.file-card__thumb {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--ink-100);
  overflow: hidden;
}
.file-card__thumb img {
  width: 100%; height: 100%; object-fit: cover; object-position: top center;
}
.file-card__type {
  position: absolute; top: 12px; right: 12px;
  background: var(--ink-900); color: var(--ink-0);
  font-family: var(--font-display); font-weight: 700; font-size: 11px;
  letter-spacing: 0.08em;
  padding: 5px 9px; border-radius: 6px;
}
.file-card__body {
  padding: 16px 18px 18px;
  display: flex; flex-direction: column; gap: 12px;
  flex: 1;
}
.file-card__title {
  font-family: var(--font-display);
  font-weight: 600; font-size: 17px; line-height: 1.25;
  color: var(--ink-900);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; text-wrap: pretty;
}
.file-card__meta {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 12.5px; color: var(--ink-500); font-weight: 500;
  margin-top: auto;
}
.file-card__meta .group { display: inline-flex; align-items: center; gap: 6px; }
.file-card__meta svg { width: 13px; height: 13px; }

.file-card--empty .file-card__thumb {
  background:
    radial-gradient(1200px 200px at 50% 100%, rgba(255,90,31,.08), transparent),
    repeating-linear-gradient(45deg, var(--ink-100) 0 12px, var(--ink-50) 12px 24px);
}
.file-card--empty .file-card__thumb-inner {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 8px;
}
.file-card--empty .file-card__thumb-inner .ico {
  width: 44px; height: 44px; color: var(--ink-400);
}
.file-card--empty .file-card__thumb-inner .lbl {
  font-family: var(--font-display); font-weight: 600; font-size: 13px; color: var(--ink-500);
  letter-spacing: 0.08em;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--ink-900); color: var(--ink-300);
  padding: 64px 0 40px; margin-top: 80px;
}
.site-footer .row { display: flex; align-items: flex-start; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.site-footer .col h4 { font-family: var(--font-display); font-size: 20px; color: var(--ink-0); margin: 0 0 8px; letter-spacing: -0.02em; }
.site-footer .col p { margin: 0; color: var(--ink-400); font-size: 14px; }
.site-footer .links { display: flex; gap: 24px; flex-wrap: wrap; }
.site-footer .links a { color: var(--ink-300); font-size: 14px; transition: color .15s; }
.site-footer .links a:hover { color: var(--brand); }
.site-footer .copy {
  margin-top: 40px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.08);
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  font-size: 13px; color: var(--ink-400); flex-wrap: wrap;
}

/* ===== Utilities ===== */
.divider-dot {
  width: 4px; height: 4px; border-radius: 50%; background: currentColor; display: inline-block; opacity: .4;
}

/* Reveal */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .container { padding: 0 18px; }
  .site-header__row { height: 60px; }
}