/* ============ CAUSIMEC — Design System ============ */
:root {
  --bg: #0d0e10;
  --bg-alt: #131519;
  --surface: #191c21;
  --surface-2: #202429;
  --line: #2a2e35;
  --text: #eceef1;
  --muted: #a0a4ad;
  --gold: #d4a24a;
  --gold-bright: #e8b95e;
  --gold-dim: #8a6d2f;
  --radius: 14px;
  --radius-sm: 10px;
  --maxw: 1180px;
  --shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.6);
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-display: "Space Grotesk", var(--font-body);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: var(--font-display); line-height: 1.1; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.9rem, 4vw, 2.9rem); margin-bottom: 1rem; }
h3 { font-size: 1.25rem; }
p { color: var(--muted); }
strong { color: var(--text); font-weight: 600; }
.accent { color: var(--gold); }

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--gold); color: #000;
  padding: 10px 16px; z-index: 200; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-weight: 600; font-size: 0.95rem;
  cursor: pointer; border: 1px solid transparent; transition: transform .18s ease, box-shadow .18s, background .18s;
}
.btn-primary { background: linear-gradient(135deg, var(--gold-bright), var(--gold)); color: #1a1206; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px -10px rgba(212, 162, 74, .6); }
.btn-ghost { border-color: var(--line); color: var(--text); background: rgba(255,255,255,.02); }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold-bright); }

/* ============ Header ============ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .3s, border-color .3s, backdrop-filter .3s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(13, 14, 16, .82); backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 74px; }
.brand-logo { height: 34px; width: auto; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  padding: 9px 14px; font-size: 0.9rem; font-weight: 500; color: var(--muted);
  border-radius: 8px; transition: color .2s, background .2s;
}
.nav a:hover { color: var(--text); }
.nav .nav-cta {
  background: var(--gold); color: #1a1206; font-weight: 600; margin-left: 8px;
}
.nav .nav-cta:hover { background: var(--gold-bright); color: #1a1206; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); transition: .3s; }

/* ============ Hero ============ */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding: 120px 0 60px; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(13,14,16,.72), rgba(13,14,16,.94)), url("/assets/img/hero-gears.jpg") center/cover no-repeat;
  transform: scale(1.05); z-index: 0;
}
.hero-inner { position: relative; z-index: 1; max-width: 820px; }
.eyebrow {
  display: inline-block; text-transform: uppercase; letter-spacing: .22em; font-size: .74rem;
  color: var(--gold); font-weight: 600; margin-bottom: 22px; padding: 7px 14px;
  border: 1px solid var(--gold-dim); border-radius: 999px;
}
.hero-title { font-size: clamp(2.8rem, 8vw, 5.4rem); font-weight: 700; margin-bottom: 24px; }
.hero-sub { font-size: clamp(1.05rem, 2vw, 1.28rem); max-width: 620px; margin-bottom: 34px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 60px; }
.hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; max-width: 760px; }
.stat { border-left: 2px solid var(--gold-dim); padding-left: 16px; }
.stat-num { display: block; font-family: var(--font-display); font-size: 1.9rem; font-weight: 700; color: var(--gold-bright); }
.stat-label { font-size: .82rem; color: var(--muted); }

/* ============ Sections ============ */
.section { padding: 100px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 680px; margin: 0 auto 56px; text-align: center; }
.kicker { text-transform: uppercase; letter-spacing: .2em; font-size: .76rem; color: var(--gold); font-weight: 600; margin-bottom: 14px; }
.lead { font-size: 1.08rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.grid-2 p { margin-bottom: 16px; }

.about-media img { border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--line); }

/* Values */
.values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 72px; }
.value-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 28px; transition: transform .25s, border-color .25s;
}
.value-card:hover { transform: translateY(-5px); border-color: var(--gold-dim); }
.value-icon { color: var(--gold); font-size: 1.6rem; margin-bottom: 14px; }
.value-card h3 { margin-bottom: 10px; }

/* ISO */
.section-iso { background: var(--bg-alt); }
.grid-iso { grid-template-columns: 340px 1fr; }
.iso-badge { display: flex; justify-content: center; }
.iso-badge img { max-width: 300px; filter: drop-shadow(0 10px 30px rgba(0,0,0,.5)); }

/* Gallery */
.gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.gallery img {
  aspect-ratio: 4/3; object-fit: cover; border-radius: var(--radius-sm); border: 1px solid var(--line);
  transition: transform .3s, filter .3s; filter: grayscale(.25) brightness(.92); cursor: pointer;
}
.gallery img:hover { transform: scale(1.03); filter: grayscale(0) brightness(1); }

/* Equipment */
.equip-group { margin-top: 40px; }
.equip-title { display: flex; align-items: center; gap: 14px; font-size: 1.5rem; margin-bottom: 24px; color: var(--text); }
.equip-title span { color: var(--gold); font-family: var(--font-display); font-size: 1rem; border: 1px solid var(--gold-dim); border-radius: 8px; padding: 4px 10px; }
.equip-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; }
.equip-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 20px; transition: border-color .2s, transform .2s; }
.equip-card:hover { border-color: var(--gold-dim); transform: translateY(-3px); }
.equip-card h4 { font-family: var(--font-display); font-size: .95rem; color: var(--gold-bright); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 8px; }
.equip-card p { font-size: .88rem; margin: 2px 0; }
.equip-card .spec { color: var(--muted); font-size: .82rem; }

/* Services */
.service-list { list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.service-list li {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 16px 18px 16px 44px; position: relative; font-size: .92rem; color: var(--text);
  transition: border-color .2s, background .2s;
}
.service-list li::before {
  content: "▹"; position: absolute; left: 18px; color: var(--gold); font-weight: 700;
}
.service-list li:hover { border-color: var(--gold-dim); background: var(--surface-2); }

/* Markets */
.markets { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.market-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 16px; text-align: center; transition: transform .25s, border-color .25s;
}
.market-card:hover { transform: translateY(-5px); border-color: var(--gold-dim); }
.market-icon { font-size: 2.2rem; display: block; margin-bottom: 12px; }
.market-card h3 { font-size: 1.02rem; }

/* Partners */
.partners { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; align-items: center; }
.partners img {
  height: 90px; width: 100%; object-fit: contain; padding: 20px; background: #fff;
  border-radius: var(--radius-sm); filter: grayscale(1); opacity: .78; transition: filter .3s, opacity .3s;
}
.partners img:hover { filter: grayscale(0); opacity: 1; }

/* Contact */
.grid-contact { align-items: start; }
.contact-info { list-style: none; margin-top: 28px; display: grid; gap: 16px; }
.contact-info li { display: flex; align-items: center; gap: 14px; }
.ci-icon { font-size: 1.2rem; }
.contact-info a:hover { color: var(--gold-bright); }
.contact-form { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: .85rem; margin-bottom: 7px; color: var(--muted); }
.field input, .field textarea {
  width: 100%; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 12px 14px; color: var(--text); font-family: inherit; font-size: .95rem; transition: border-color .2s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--gold); }
.contact-form .btn { width: 100%; justify-content: center; }

/* Footer */
.site-footer { background: #08090a; border-top: 1px solid var(--line); padding: 48px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.footer-logo { height: 40px; margin-bottom: 12px; }
.footer-inner p { font-size: .88rem; max-width: 420px; }
.copyright { font-size: .82rem; }

/* ============ Reveal animation ============ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

/* ============ Chat ============ */
.chat-fab {
  position: fixed; bottom: 24px; right: 24px; z-index: 150;
  display: flex; align-items: center; gap: 10px; padding: 14px 22px;
  background: linear-gradient(135deg, var(--gold-bright), var(--gold)); color: #1a1206;
  border: none; border-radius: 999px; font-weight: 600; font-size: .95rem; cursor: pointer;
  box-shadow: 0 14px 34px -10px rgba(212,162,74,.6); transition: transform .2s, box-shadow .2s;
}
.chat-fab:hover { transform: translateY(-3px); box-shadow: 0 18px 40px -10px rgba(212,162,74,.75); }
.chat-fab-icon { font-size: 1.15rem; }
.chat-fab.hidden { display: none; }

.chat-panel {
  position: fixed; bottom: 24px; right: 24px; z-index: 160; width: min(400px, calc(100vw - 32px));
  height: min(600px, calc(100vh - 48px)); background: var(--surface); border: 1px solid var(--line);
  border-radius: 18px; box-shadow: var(--shadow); display: flex; flex-direction: column; overflow: hidden;
  opacity: 0; transform: translateY(20px) scale(.97); pointer-events: none; transition: opacity .25s, transform .25s;
}
.chat-panel.open { opacity: 1; transform: none; pointer-events: auto; }
.chat-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; background: var(--surface-2); border-bottom: 1px solid var(--line); }
.chat-title { display: flex; align-items: center; gap: 12px; }
.chat-avatar { width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, var(--gold-bright), var(--gold)); color: #1a1206; display: grid; place-items: center; font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; }
.chat-title strong { display: block; font-size: .95rem; }
.chat-title small { color: var(--muted); font-size: .76rem; }
.chat-close { background: none; border: none; color: var(--muted); font-size: 1.1rem; cursor: pointer; padding: 6px; }
.chat-close:hover { color: var(--text); }
.chat-messages { flex: 1; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 12px; }
.msg { max-width: 85%; padding: 11px 15px; border-radius: 14px; font-size: .9rem; line-height: 1.5; white-space: pre-wrap; }
.msg.bot { background: var(--surface-2); border: 1px solid var(--line); align-self: flex-start; border-bottom-left-radius: 4px; color: var(--text); }
.msg.user { background: linear-gradient(135deg, var(--gold-bright), var(--gold)); color: #1a1206; align-self: flex-end; border-bottom-right-radius: 4px; font-weight: 500; }
.msg.bot a { color: var(--gold-bright); text-decoration: underline; }
.chat-suggestions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.chat-chip { background: transparent; border: 1px solid var(--gold-dim); color: var(--gold-bright); font-size: .8rem; padding: 7px 12px; border-radius: 999px; cursor: pointer; transition: background .2s; }
.chat-chip:hover { background: rgba(212,162,74,.12); }
.typing { display: inline-flex; gap: 4px; }
.typing span { width: 7px; height: 7px; background: var(--muted); border-radius: 50%; animation: blink 1.2s infinite; }
.typing span:nth-child(2) { animation-delay: .2s; }
.typing span:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 60%, 100% { opacity: .3; } 30% { opacity: 1; } }
.chat-input { display: flex; gap: 8px; padding: 14px; border-top: 1px solid var(--line); background: var(--surface-2); }
.chat-input input { flex: 1; background: var(--bg); border: 1px solid var(--line); border-radius: 999px; padding: 11px 16px; color: var(--text); font-family: inherit; font-size: .9rem; }
.chat-input input:focus { outline: none; border-color: var(--gold); }
.chat-input button { width: 42px; height: 42px; border-radius: 50%; border: none; background: linear-gradient(135deg, var(--gold-bright), var(--gold)); color: #1a1206; font-size: 1rem; cursor: pointer; flex-shrink: 0; transition: transform .15s; }
.chat-input button:hover { transform: scale(1.06); }

/* ============ Responsive ============ */
@media (max-width: 900px) {
  .nav {
    position: fixed; inset: 74px 0 auto 0; flex-direction: column; align-items: stretch;
    background: rgba(13,14,16,.97); backdrop-filter: blur(14px); padding: 16px 24px 24px;
    gap: 4px; border-bottom: 1px solid var(--line); transform: translateY(-120%); transition: transform .3s;
  }
  .nav.open { transform: none; }
  .nav a { padding: 13px 14px; border-bottom: 1px solid var(--line); }
  .nav .nav-cta { margin: 8px 0 0; text-align: center; }
  .nav-toggle { display: flex; }
  .grid-2, .grid-iso, .grid-contact { grid-template-columns: 1fr; gap: 36px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .values { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .markets { grid-template-columns: repeat(2, 1fr); }
  .service-list { grid-template-columns: 1fr; }
  .partners { grid-template-columns: repeat(2, 1fr); }
  .iso-badge img { max-width: 220px; }
}
@media (max-width: 480px) {
  .section { padding: 68px 0; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .chat-fab-text { display: none; }
  .chat-fab { padding: 16px; }
}