/* GREENFISH — design tokens + landing page styles */
:root {
  /* palette — drawn from the mascot (teal/coral) and aquascape (deep green) */
  --c-bg:        #03100c;
  --c-bg-elev:   #0a1f17;
  --c-surface:   #0e261c;
  --c-teal:      #16b6a4;
  --c-green:     #6ee7a8;
  --c-coral:     #ff6b42;
  --c-text:      #eafff5;
  --c-muted:     #93c9b1;
  --c-line:      rgba(110, 231, 168, 0.16);

  /* type scale */
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --fs-wordmark: clamp(2.75rem, 11vw, 7rem);
  --fs-h2:       clamp(1.6rem, 4vw, 2.5rem);
  --fs-lead:     clamp(1.1rem, 2.2vw, 1.4rem);
  --fs-body:     1.05rem;

  /* spacing scale */
  --sp-1: 0.5rem;  --sp-2: 1rem;   --sp-3: 1.5rem;
  --sp-4: 2.5rem;  --sp-5: 4rem;   --sp-6: 6rem;

  --radius: 14px;
  --maxw: 1080px;
  color-scheme: dark;
}

* { margin: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--c-green); text-decoration: none; }
img, video { display: block; max-width: 100%; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--c-green); color: var(--c-bg); padding: var(--sp-1) var(--sp-2);
  border-radius: 0 0 var(--radius) 0; font-weight: 700;
}
.skip-link:focus { left: 0; }

/* ---- Header ---- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--sp-2) clamp(var(--sp-2), 4vw, var(--sp-4));
  backdrop-filter: blur(8px);
  background: linear-gradient(to bottom, rgba(3,16,12,0.85), rgba(3,16,12,0));
}
.wordmark {
  font-weight: 800; letter-spacing: 0.18em; font-size: 1.05rem;
  color: var(--c-text);
}
.wordmark span { color: var(--c-teal); }
.nav { display: flex; align-items: center; gap: clamp(var(--sp-2), 3vw, var(--sp-4)); }
.nav a { color: var(--c-muted); font-size: 0.95rem; letter-spacing: 0.03em; }
.nav a:hover, .nav a:focus-visible { color: var(--c-green); }

.lang-toggle {
  font: inherit; cursor: pointer; color: var(--c-muted);
  background: transparent; border: 1px solid var(--c-line);
  border-radius: 999px; padding: 0.35rem 0.7rem; letter-spacing: 0.05em;
}
.lang-toggle .sep { opacity: 0.4; margin: 0 0.15rem; }
.lang-toggle:hover { border-color: var(--c-green); color: var(--c-text); }
html[lang="de"] .lang-en, html[lang="en"] .lang-de { opacity: 0.4; }
html[lang="de"] .lang-de, html[lang="en"] .lang-en { color: var(--c-green); font-weight: 700; }

/* ---- Hero ---- */
.hero {
  position: relative; min-height: 100svh;
  display: grid; place-items: center; text-align: center;
  padding: var(--sp-6) var(--sp-3) var(--sp-5);
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background: url("assets/aquascape.jpg") center/cover no-repeat;
  filter: saturate(1.05);
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(120% 90% at 50% 35%, rgba(3,16,12,0.35), rgba(3,16,12,0.92) 80%);
}
.hero-inner { position: relative; display: grid; justify-items: center; gap: var(--sp-3); }
.hero-fish {
  width: clamp(160px, 34vw, 300px); aspect-ratio: 1; border-radius: 50%;
  mix-blend-mode: screen;
  filter: drop-shadow(0 0 40px rgba(22,182,164,0.45));
}
.hero-wordmark {
  font-size: var(--fs-wordmark); font-weight: 800; letter-spacing: 0.06em;
  line-height: 0.95; text-shadow: 0 4px 40px rgba(3,16,12,0.6);
}
.hero-wordmark span { color: var(--c-teal); }
.hero-tagline {
  font-size: var(--fs-lead); color: var(--c-muted);
  text-transform: uppercase; letter-spacing: 0.28em;
}
.scroll-cue {
  position: absolute; bottom: var(--sp-3); left: 50%; transform: translateX(-50%);
  color: var(--c-muted); font-size: 1.5rem; animation: bob 2s ease-in-out infinite;
}
@keyframes bob { 0%,100% { transform: translate(-50%, 0); } 50% { transform: translate(-50%, 8px); } }

/* ---- Buttons ---- */
.btn {
  display: inline-block; font-weight: 700; letter-spacing: 0.04em;
  padding: 0.8rem 1.6rem; border-radius: 999px; transition: transform .15s, box-shadow .15s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--c-teal), var(--c-green));
  color: var(--c-bg); box-shadow: 0 8px 30px rgba(22,182,164,0.35);
}
.btn-ghost { border: 1px solid var(--c-line); color: var(--c-text); }
.btn-ghost:hover { border-color: var(--c-green); }

/* ---- Sections ---- */
.section {
  max-width: var(--maxw); margin: 0 auto;
  padding: var(--sp-6) clamp(var(--sp-3), 5vw, var(--sp-5));
}
.section-title {
  font-size: var(--fs-h2); font-weight: 800; letter-spacing: 0.02em;
  margin-bottom: var(--sp-3); position: relative; padding-bottom: var(--sp-2);
}
.section-title::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 56px; height: 3px;
  background: linear-gradient(90deg, var(--c-teal), var(--c-coral)); border-radius: 3px;
}
.about .lead { font-size: var(--fs-lead); color: var(--c-text); margin-bottom: var(--sp-2); }
.about p { color: var(--c-muted); font-size: var(--fs-body); max-width: 60ch; }

/* ---- Videos ---- */
.video-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--sp-3); margin-bottom: var(--sp-4);
}
.video-card {
  background: var(--c-surface); border: 1px solid var(--c-line);
  border-radius: var(--radius); overflow: hidden; color: var(--c-text);
  transition: transform .18s, border-color .18s;
}
.video-card:hover, .video-card:focus-visible {
  transform: translateY(-4px); border-color: var(--c-teal);
}
.video-thumb { position: relative; display: block; aspect-ratio: 16/9; overflow: hidden; }
.video-thumb img { width: 100%; height: 100%; object-fit: cover; }
.video-thumb .play {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-size: 2rem; color: #fff; background: rgba(3,16,12,0.25);
  opacity: 0; transition: opacity .18s;
}
.video-card:hover .play, .video-card:focus-visible .play { opacity: 1; }
.video-title { display: block; padding: var(--sp-2); font-weight: 600; line-height: 1.4; }

/* ---- Contact ---- */
.contact p { color: var(--c-muted); margin-bottom: var(--sp-3); }
.contact .links { display: flex; gap: var(--sp-2); flex-wrap: wrap; }

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--c-line);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--sp-2);
  padding: var(--sp-3) clamp(var(--sp-3), 5vw, var(--sp-5));
  color: var(--c-muted); font-size: 0.9rem;
}
.footer-tag { text-transform: uppercase; letter-spacing: 0.2em; }

/* ---- Motion preference ---- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .scroll-cue { animation: none; }
  .btn:hover, .video-card:hover { transform: none; }
}