/* =========================================================
   FONOSOND — Design System
   ========================================================= */
:root {
  /* Brand */
  --bg-0:        #050D1A;
  --bg-1:        #0A1A2F;
  --bg-2:        #0F2440;
  --bg-3:        #142E54;
  --line:        rgba(255,255,255,0.08);
  --line-strong: rgba(255,255,255,0.16);

  --ink-0:       #F4FAFF;
  --ink-1:       #C9DCEF;
  --ink-2:       #8BA3BD;
  --ink-3:       #5C7591;

  --signal:      #00D9FF;
  --signal-2:    #7AF0FF;
  --signal-glow: rgba(0,217,255,0.35);

  --accent:      #FF7A1A;
  --accent-2:    #FFB347;
  --ok:          #34D399;
  --warn:        #F59E0B;

  /* Type */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, 'Segoe UI', sans-serif;
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Layout */
  --container: 1200px;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --shadow-1: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
  --shadow-glow: 0 0 0 1px rgba(0,217,255,.18), 0 8px 40px rgba(0,217,255,.18);

  --ease: cubic-bezier(.2,.8,.2,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg-0);
  color: var(--ink-1);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--signal); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--signal-2); }

h1,h2,h3,h4 { font-family: var(--font-display); color: var(--ink-0); line-height: 1.15; letter-spacing: -0.01em; margin: 0 0 .5em; font-weight: 700; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.4rem); }
p  { margin: 0 0 1em; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: clamp(64px, 9vw, 120px) 0; position: relative; }
.section--alt { background: linear-gradient(180deg, var(--bg-0), var(--bg-1)); }
.section--dark { background: var(--bg-1); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--signal);
  padding: .35rem .75rem;
  border: 1px solid rgba(0,217,255,.3);
  border-radius: 999px;
  background: rgba(0,217,255,.06);
  margin-bottom: 1.2rem;
}

.lead { font-size: 1.15rem; color: var(--ink-1); max-width: 60ch; }
.muted { color: var(--ink-2); }

/* ====================== HEADER ====================== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(5,13,26,.7);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; gap: 32px;
  height: 72px;
}
.nav__logo { display: flex; align-items: center; }
.nav__logo svg { height: 30px; width: auto; }
.nav__links {
  display: flex; gap: 26px; margin-left: auto; align-items: center;
}
.nav__links a {
  color: var(--ink-1); font-size: .92rem; font-weight: 500;
  position: relative; padding: 6px 0;
}
.nav__links a:hover { color: var(--ink-0); }
.nav__links a.active { color: var(--signal); }
.nav__lang {
  display: flex; align-items: center; gap: 4px;
  font-family: var(--font-mono); font-size: .78rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px; padding: 4px;
}
.nav__lang a {
  padding: 4px 10px; border-radius: 999px;
  color: var(--ink-2);
}
.nav__lang a.is-current { background: var(--signal); color: var(--bg-0); font-weight: 600; }
.nav__cta { margin-left: 12px; }
.nav__burger {
  display: none; background: none; border: none;
  color: var(--ink-0); padding: 8px; cursor: pointer;
}
@media (max-width: 920px) {
  .nav__links { display: none; }
  .nav__burger { display: block; }
  .nav__lang { margin-left: auto; }
  .nav__links.is-open {
    display: flex; flex-direction: column;
    position: absolute; top: 72px; left: 0; right: 0;
    background: var(--bg-1); padding: 24px;
    gap: 18px; align-items: stretch;
    border-bottom: 1px solid var(--line);
  }
  .nav__links.is-open .nav__cta { margin: 0; }
}

/* ====================== BUTTONS ====================== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: .95rem;
  font-family: var(--font-sans);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .2s var(--ease);
  text-decoration: none;
}
.btn--primary {
  background: var(--signal);
  color: var(--bg-0);
}
.btn--primary:hover {
  background: var(--signal-2);
  color: var(--bg-0);
  box-shadow: 0 6px 24px var(--signal-glow);
  transform: translateY(-1px);
}
.btn--ghost {
  background: transparent;
  color: var(--ink-0);
  border-color: var(--line-strong);
}
.btn--ghost:hover { border-color: var(--signal); color: var(--signal); }
.btn--accent {
  background: var(--accent);
  color: var(--bg-0);
}
.btn--accent:hover { background: var(--accent-2); }

/* ====================== HERO ====================== */
.hero {
  position: relative;
  padding: clamp(80px, 14vw, 140px) 0 clamp(80px, 12vw, 120px);
  background:
    radial-gradient(ellipse at 80% -10%, rgba(0,217,255,.18), transparent 50%),
    radial-gradient(ellipse at 10% 100%, rgba(255,122,26,.12), transparent 50%),
    var(--bg-0);
  overflow: hidden;
}
.hero__grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: center;
}
@media (max-width: 920px) {
  .hero__grid { grid-template-columns: 1fr; gap: 40px; }
}
.hero__title {
  font-size: clamp(2.4rem, 5.6vw, 4rem);
  margin-bottom: 1rem;
}
.hero__title .grad {
  background: linear-gradient(135deg, var(--signal), var(--signal-2));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__sub { font-size: 1.15rem; color: var(--ink-1); max-width: 52ch; margin-bottom: 2rem; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 2rem; }
.hero__badges { display: flex; gap: 10px; flex-wrap: wrap; }
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px; border-radius: 999px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line-strong);
  font-size: .78rem; color: var(--ink-1);
  font-family: var(--font-mono);
}
.badge--patent { border-color: rgba(0,217,255,.4); color: var(--signal); }
.badge--accent { border-color: rgba(255,122,26,.4); color: var(--accent-2); }

.hero__visual {
  position: relative;
  aspect-ratio: 1/1;
  max-width: 520px;
  margin-left: auto;
}
#wave-canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
}
.hero__visual::before {
  content: '';
  position: absolute; inset: 10%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,217,255,.25), transparent 60%);
  filter: blur(40px);
  z-index: 0;
}

/* ====================== CARDS / GRID ====================== */
.grid { display: grid; gap: 24px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 920px) {
  .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .grid--2 { grid-template-columns: 1fr; }
}

.card {
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  transition: all .25s var(--ease);
}
.card:hover {
  border-color: rgba(0,217,255,.3);
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
}
.card__icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(0,217,255,.08);
  border: 1px solid rgba(0,217,255,.2);
  display: grid; place-items: center;
  color: var(--signal);
  margin-bottom: 18px;
}
.card__icon svg { width: 24px; height: 24px; }
.card h3 { margin-bottom: .4em; }
.card p { color: var(--ink-2); font-size: .95rem; margin: 0; }
.card__link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 16px; font-size: .9rem; font-weight: 600;
}

/* ====================== STATS ====================== */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 920px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat {
  padding: 24px;
  border-left: 2px solid var(--signal);
  background: rgba(255,255,255,.02);
}
.stat__num {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--ink-0);
  line-height: 1;
}
.stat__label { color: var(--ink-2); font-size: .85rem; margin-top: 8px; }

/* ====================== TIMELINE ====================== */
.timeline { position: relative; padding-left: 28px; border-left: 2px solid var(--line-strong); }
.timeline__item { padding-bottom: 32px; position: relative; }
.timeline__item::before {
  content: ''; position: absolute; left: -35px; top: 4px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--bg-0);
  border: 2px solid var(--signal);
}
.timeline__item--done::before { background: var(--signal); }
.timeline__date {
  font-family: var(--font-mono); font-size: .8rem;
  color: var(--signal); margin-bottom: 4px; letter-spacing: .05em;
}
.timeline__title { font-weight: 600; color: var(--ink-0); margin-bottom: 4px; }
.timeline__desc { color: var(--ink-2); font-size: .92rem; }

/* ====================== TEAM ====================== */
.team { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
@media (max-width: 920px) { .team { grid-template-columns: 1fr; gap: 24px; } }
.member { text-align: left; }
.member__photo {
  aspect-ratio: 1/1;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--bg-2), var(--bg-3));
  margin-bottom: 18px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
}
.member__photo img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.member__photo--placeholder {
  display: grid; place-items: center;
  font-family: var(--font-display); font-size: 4rem; font-weight: 700;
  color: var(--signal); opacity: .35;
}
.member__name { font-family: var(--font-display); font-size: 1.3rem; font-weight: 600; color: var(--ink-0); margin-bottom: 4px; }
.member__role { color: var(--signal); font-size: .9rem; font-family: var(--font-mono); margin-bottom: 12px; }
.member__bio { color: var(--ink-2); font-size: .92rem; }

/* ====================== FORM ====================== */
.form { display: grid; gap: 16px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .form__row { grid-template-columns: 1fr; } }
.field label {
  display: block; font-size: .85rem; color: var(--ink-1);
  margin-bottom: 6px; font-weight: 500;
}
.field input, .field textarea, .field select {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-1);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  color: var(--ink-0);
  font-family: inherit; font-size: 1rem;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--signal);
  box-shadow: 0 0 0 3px rgba(0,217,255,.15);
}
.field textarea { resize: vertical; min-height: 130px; }
.form__msg { font-size: .9rem; }
.form__msg--ok { color: var(--ok); }
.form__msg--err { color: #FF6B6B; }

.honeypot {
  position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden;
}

/* ====================== FOOTER ====================== */
.site-footer {
  background: var(--bg-1);
  border-top: 1px solid var(--line);
  padding: 64px 0 32px;
  margin-top: 80px;
}
.footer__grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  margin-bottom: 48px;
}
@media (max-width: 920px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
.footer__brand p { color: var(--ink-2); font-size: .9rem; max-width: 36ch; margin-top: 16px; }
.footer__col h4 {
  font-family: var(--font-mono); font-size: .75rem;
  letter-spacing: .15em; text-transform: uppercase;
  color: var(--ink-2); font-weight: 500; margin-bottom: 16px;
}
.footer__col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer__col a { color: var(--ink-1); font-size: .92rem; }
.footer__col a:hover { color: var(--signal); }
.footer__bottom {
  display: flex; justify-content: space-between; gap: 16px;
  padding-top: 24px; border-top: 1px solid var(--line);
  color: var(--ink-3); font-size: .85rem;
  flex-wrap: wrap;
}

/* ====================== UTILITY ====================== */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
  margin: 48px 0;
}

.feature-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
}
.feature-row + .feature-row { margin-top: 80px; }
.feature-row--reverse { direction: rtl; }
.feature-row--reverse > * { direction: ltr; }
@media (max-width: 920px) {
  .feature-row, .feature-row--reverse { grid-template-columns: 1fr; gap: 32px; direction: ltr; }
}
.feature-row__visual {
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.feature-row__visual--spectrum {
  background: var(--bg-1);
  display: grid; place-items: center;
}
.feature-row__visual svg { width: 88%; height: auto; }

.checklist { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.checklist li {
  display: grid; grid-template-columns: 24px 1fr; gap: 12px; align-items: start;
  color: var(--ink-1); font-size: .98rem;
}
.checklist li::before {
  content: ''; width: 18px; height: 18px; margin-top: 4px;
  background: var(--signal);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M9 16.2l-3.5-3.5L4 14.2 9 19l11-11-1.5-1.5z'/%3E%3C/svg%3E") no-repeat center / contain;
          mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M9 16.2l-3.5-3.5L4 14.2 9 19l11-11-1.5-1.5z'/%3E%3C/svg%3E") no-repeat center / contain;
}

/* CTA banner */
.cta-banner {
  background: linear-gradient(135deg, rgba(0,217,255,.08), rgba(255,122,26,.06));
  border: 1px solid rgba(0,217,255,.25);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: grid; grid-template-columns: 1fr auto; gap: 32px; align-items: center;
}
@media (max-width: 720px) {
  .cta-banner { grid-template-columns: 1fr; padding: 32px; }
}
.cta-banner h2 { margin-bottom: .3em; }
.cta-banner p { color: var(--ink-1); margin: 0; }

/* Scroll reveal */
[data-reveal] {
  opacity: 0; transform: translateY(20px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  [data-reveal] { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* Skip link */
.skip-link {
  position: absolute; top: -40px; left: 8px; padding: 8px 12px;
  background: var(--signal); color: var(--bg-0); border-radius: 6px;
  z-index: 100; font-weight: 600;
}
.skip-link:focus { top: 8px; }

/* Print */
@media print {
  .site-header, .site-footer, .hero__visual, .nav__cta { display: none; }
  body { background: white; color: black; }
}