/* ============================================================
   FSDRILL — design system
   ============================================================ */
:root {
  --bg: #ffffff;
  --bg-soft: #f5f5f3;
  --bg-warm: #efece7;
  --ink: #14161a;
  --ink-2: #3d4148;
  --ink-3: #6b7078;
  --line: #e3e1dc;
  --line-2: #d3d0c9;
  --accent: #c8452c;
  --accent-dark: #a5371f;
  --steel: #23282e;
  --radius: 3px;
  --radius-lg: 6px;
  --maxw: 1280px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial,
          'Noto Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body[dir='rtl'] { text-align: right; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }
@media (max-width: 720px) { .wrap { padding: 0 20px; } }

/* ---------- typography ---------- */
h1, h2, h3, h4 { margin: 0; font-weight: 600; letter-spacing: -0.02em; line-height: 1.12; }
h1 { font-size: clamp(2.4rem, 5.4vw, 4.1rem); font-weight: 500; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.7rem); font-weight: 500; }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }

.eyebrow {
  font-size: .74rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600; margin: 0 0 18px;
}
.lede { font-size: 1.06rem; color: var(--ink-2); max-width: 62ch; }
.muted { color: var(--ink-3); }
.mono { font-family: var(--mono); font-size: .82rem; letter-spacing: .01em; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; gap: 28px;
  height: 66px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .04em; font-size: 1.02rem; }
.brand-mark {
  width: 26px; height: 26px; flex: none;
  display: grid; place-items: center;
}
.nav { display: flex; align-items: center; gap: 26px; margin-left: 6px; }
.nav a {
  font-size: .9rem; color: var(--ink-2); padding: 4px 0;
  border-bottom: 1.5px solid transparent; transition: color .18s, border-color .18s;
}
.nav a:hover, .nav a.active { color: var(--ink); border-color: var(--accent); }
.header-right { margin-left: auto; display: flex; align-items: center; gap: 14px; }

.lang-switch { display: flex; align-items: center; gap: 2px; }
.lang-switch button {
  background: none; border: 0; cursor: pointer; padding: 5px 7px;
  font-size: .74rem; font-weight: 600; letter-spacing: .07em; text-transform: uppercase;
  color: var(--ink-3); border-radius: var(--radius);
}
.lang-switch button.on { color: var(--ink); background: var(--bg-soft); }
.lang-switch button:hover { color: var(--ink); }

.btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  padding: 11px 20px; border-radius: var(--radius); border: 1px solid transparent;
  font-size: .88rem; font-weight: 500; transition: all .18s; white-space: nowrap;
  background: none;
}
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: var(--accent); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-dark); }
.btn-outline { border-color: var(--line-2); color: var(--ink); }
.btn-outline:hover { border-color: var(--ink); background: var(--bg-soft); }
.btn-ghost { color: var(--ink-2); padding: 8px 12px; }
.btn-ghost:hover { color: var(--ink); background: var(--bg-soft); }
.btn-sm { padding: 7px 14px; font-size: .82rem; }
.btn-danger { background: #b3261e; color: #fff; }
.btn-danger:hover { background: #8e1d17; }
.btn[disabled] { opacity: .5; pointer-events: none; }

.burger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.burger span { display: block; width: 20px; height: 1.6px; background: var(--ink); margin: 4px 0; }

@media (max-width: 980px) {
  .nav {
    position: fixed; inset: 66px 0 auto 0; background: #fff;
    flex-direction: column; align-items: flex-start; gap: 0;
    padding: 8px 20px 20px; border-bottom: 1px solid var(--line);
    display: none; margin: 0;
  }
  .nav.open { display: flex; }
  .nav a { padding: 13px 0; width: 100%; border-bottom: 1px solid var(--line); }
  .burger { display: block; margin-left: auto; }
  .header-right .lang-switch { display: flex; }
  .header-right .btn-primary { display: none; }
}

/* ---------- hero ---------- */
.hero { padding: 92px 0 68px; border-bottom: 1px solid var(--line); }
.hero h1 { max-width: 16ch; margin-bottom: 22px; }
.hero .lede { font-size: 1.14rem; }
.hero-actions { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }

/* ---------- sections ---------- */
.section { padding: 76px 0; }
.section-soft { background: var(--bg-soft); }
.section-dark { background: var(--steel); color: #f2f1ee; }
.section-dark .eyebrow, .section-dark .muted { color: #9aa1ab; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 40px; flex-wrap: wrap; }
.section-head p { margin: 8px 0 0; }

/* ---------- product grid ---------- */
.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 1080px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 820px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .grid-4 { grid-template-columns: 1fr; } }

.card {
  background: var(--bg); padding: 0; display: flex; flex-direction: column;
  transition: background .2s;
}
.card:hover { background: #fbfaf9; }
.card-media {
  aspect-ratio: 4/3; background: var(--bg-warm); overflow: hidden;
  display: grid; place-items: center; border-bottom: 1px solid var(--line);
}
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.card:hover .card-media img { transform: scale(1.035); }
.card-body { padding: 22px 22px 26px; display: flex; flex-direction: column; flex: 1; }
.card-title { font-size: 1.04rem; font-weight: 600; margin-bottom: 10px; letter-spacing: -0.01em; }
.card-sub { font-size: .88rem; color: var(--ink-3); flex: 1; }
.card-spec { display: grid; gap: 7px; margin: 16px 0 18px; }
.card-spec div { display: flex; justify-content: space-between; gap: 12px; font-size: .8rem; border-bottom: 1px dotted var(--line-2); padding-bottom: 6px; }
.card-spec dt, .card-spec .k { color: var(--ink-3); }
.card-spec .v { font-family: var(--mono); font-size: .76rem; color: var(--ink-2); text-align: right; }
.card-link { font-size: .85rem; font-weight: 500; display: inline-flex; align-items: center; gap: 6px; margin-top: auto; }
.card-link:hover { color: var(--accent); }

.bit-art { width: 78%; max-width: 210px; }

/* ---------- applications ---------- */
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (max-width: 820px) { .app-grid { grid-template-columns: 1fr; } }
.app-item { background: var(--bg); padding: 34px 30px 30px; display: flex; flex-direction: column; }
.app-item h3 { margin-bottom: 8px; }
.app-item p { color: var(--ink-3); font-size: .9rem; }
.app-item a { margin-top: 14px; font-size: .85rem; font-weight: 500; }
.app-item a:hover { color: var(--accent); }
.app-num { font-family: var(--mono); font-size: .74rem; color: var(--accent); margin-bottom: 14px; }

/* ---------- video / about split ---------- */
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; gap: 32px; } }
.media-frame {
  position: relative; aspect-ratio: 16/10; background: var(--bg-warm);
  border: 1px solid var(--line); overflow: hidden;
}
.media-frame img { width: 100%; height: 100%; object-fit: cover; }
.play-badge {
  position: absolute; bottom: 14px; left: 14px; background: rgba(20,22,26,.85);
  color: #fff; font-size: .78rem; padding: 7px 12px; border-radius: var(--radius);
  display: inline-flex; align-items: center; gap: 8px; font-weight: 500;
}
.play-badge:hover { background: var(--accent); }

/* ---------- feedback ---------- */
.feedback-rail { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 900px) { .feedback-rail { grid-template-columns: 1fr; } }
.feedback-card { border: 1px solid var(--line); background: var(--bg); }
.feedback-shot { aspect-ratio: 16/11; background: var(--bg-warm); border-bottom: 1px solid var(--line); display: grid; place-items: center; overflow: hidden; }
.feedback-shot img { width: 100%; height: 100%; object-fit: cover; }
.feedback-card .fb-body { padding: 20px; }
.feedback-card h4 { font-size: .98rem; margin-bottom: 7px; }
.feedback-card p { font-size: .86rem; color: var(--ink-3); margin: 0 0 12px; }
.feedback-card a { font-size: .8rem; font-weight: 500; }
.feedback-card a:hover { color: var(--accent); }

/* ---------- product detail ---------- */
.crumbs { font-size: .78rem; color: var(--ink-3); padding: 20px 0 0; display: flex; gap: 8px; flex-wrap: wrap; }
.crumbs a:hover { color: var(--ink); }
.crumbs span.sep { color: var(--line-2); }

.pd-top { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; padding: 34px 0 60px; align-items: start; }
@media (max-width: 900px) { .pd-top { grid-template-columns: 1fr; gap: 28px; } }
.pd-gallery-main { aspect-ratio: 1/1; background: var(--bg-warm); border: 1px solid var(--line); overflow: hidden; display: grid; place-items: center; }
.pd-gallery-main img { width: 100%; height: 100%; object-fit: cover; }
.pd-thumbs { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.pd-thumbs button { width: 68px; height: 68px; padding: 0; border: 1px solid var(--line); background: var(--bg-warm); cursor: pointer; overflow: hidden; }
.pd-thumbs button.on { border-color: var(--ink); }
.pd-thumbs img { width: 100%; height: 100%; object-fit: cover; }
.pd-info h1 { font-size: clamp(1.7rem, 3vw, 2.4rem); margin-bottom: 14px; }
.pd-sub { color: var(--ink-2); font-size: 1.02rem; margin-bottom: 22px; }
.pd-meta { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 22px; font-size: .78rem; }
.pill { border: 1px solid var(--line-2); padding: 4px 10px; border-radius: 999px; color: var(--ink-2); }
.pill.accent { border-color: var(--accent); color: var(--accent); }

.spec-block { margin: 0 0 8px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.spec-table th, .spec-table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec-table th { color: var(--ink-3); font-weight: 500; width: 34%; background: var(--bg-soft); }
.spec-table td { font-family: var(--mono); font-size: .8rem; }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: 0; }
[dir='rtl'] .spec-table th, [dir='rtl'] .spec-table td { text-align: right; }

.h3-label { font-size: .74rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); font-weight: 600; padding: 34px 0 14px; border-top: 1px solid var(--line); margin-top: 34px; }

.cta-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 6px; }

/* ---------- forms ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 620px) { .form-grid { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: .78rem; font-weight: 500; color: var(--ink-2); letter-spacing: .02em; }
.field input, .field select, .field textarea {
  padding: 10px 13px; border: 1px solid var(--line-2); border-radius: var(--radius);
  background: #fff; font-size: .9rem; transition: border-color .15s, box-shadow .15s;
}
.field textarea { min-height: 118px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--ink); box-shadow: 0 0 0 3px rgba(20,22,26,.06);
}

.alert { padding: 12px 15px; border-radius: var(--radius); font-size: .86rem; margin-bottom: 16px; border: 1px solid; }
.alert-ok { background: #f0f7f1; border-color: #bfdcc4; color: #205c2c; }
.alert-err { background: #fdf1f0; border-color: #eec3bd; color: #8e1d17; }
.alert-info { background: var(--bg-soft); border-color: var(--line-2); color: var(--ink-2); }

/* ---------- footer ---------- */
.site-footer { background: var(--steel); color: #b9bfc8; padding: 62px 0 30px; font-size: .87rem; }
.site-footer h5 { color: #fff; font-size: .76rem; letter-spacing: .14em; text-transform: uppercase; margin: 0 0 16px; font-weight: 600; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 44px; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer a { color: #b9bfc8; }
.site-footer a:hover { color: #fff; }
.footer-links { display: grid; gap: 10px; }
.footer-bottom { border-top: 1px solid #363b42; margin-top: 48px; padding-top: 22px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: .78rem; color: #868d97; }
.footer-brand { color: #fff; font-weight: 700; letter-spacing: .04em; font-size: 1.05rem; display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }

/* ---------- misc ---------- */
.stack { display: grid; gap: 14px; }
.row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.between { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.empty { padding: 70px 0; text-align: center; color: var(--ink-3); }
.tag { font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; font-weight: 600; padding: 3px 8px; border-radius: 2px; }
.tag-published { background: #e8f3ea; color: #205c2c; }
.tag-draft { background: var(--bg-soft); color: var(--ink-3); border: 1px solid var(--line-2); }
.spinner { width: 18px; height: 18px; border: 2px solid var(--line-2); border-top-color: var(--ink); border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.skeleton { background: linear-gradient(90deg, #f0efec 25%, #e6e4e0 50%, #f0efec 75%); background-size: 200% 100%; animation: sk 1.3s ease infinite; }
@keyframes sk { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

@media print { .site-header, .site-footer, .cta-row { display: none; } }