:root {
  --bg: #0b0f1a;
  --panel: #131a29;
  --panel-2: #1a2234;
  --border: #2a3450;
  --text: #e9eef7;
  --muted: #93a0b8;
  --primary: #2dd4bf;   /* teal */
  --primary-2: #38bdf8; /* sky */
  --blue: #38bdf8;
  --green: #4ade80;
  --purple: #a78bfa;
  --amber: #fbbf24;
  --red: #f87171;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
}

header {
  padding: 22px 40px;
  border-bottom: 1px solid var(--border);
  background: rgba(11, 15, 26, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { display: flex; align-items: baseline; gap: 12px; cursor: pointer; }
.logo { color: var(--primary); font-size: 24px; }
h1 { margin: 0; font-size: 22px; letter-spacing: 1px; }
.tagline { color: var(--muted); font-size: 14px; }

main { max-width: 1080px; margin: 0 auto; padding: 0 28px 96px; }

/* ---------- Landing ---------- */
#landing { }
.landing-hero {
  text-align: center;
  padding: 96px 24px 64px;
  position: relative;
}
.landing-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 320px at 50% 0%, rgba(45, 212, 191, 0.18), transparent 70%),
    radial-gradient(500px 300px at 80% 20%, rgba(56, 189, 248, 0.14), transparent 70%);
  pointer-events: none;
}
.landing-hero .kicker {
  display: inline-block;
  color: var(--primary);
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 13px;
  letter-spacing: .4px;
  margin-bottom: 24px;
}
.landing-hero h2 {
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.08;
  margin: 0 auto 20px;
  max-width: 720px;
  letter-spacing: -0.5px;
}
.landing-hero h2 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--primary), var(--primary-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.landing-hero .sub {
  font-size: 18px;
  line-height: 1.6;
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto 36px;
}
.landing-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #061018;
  border: none;
  border-radius: 10px;
  padding: 15px 34px;
  font-weight: 700;
  font-size: 17px;
  cursor: pointer;
  box-shadow: 0 8px 28px rgba(45, 212, 191, 0.28);
  transition: transform .12s, box-shadow .12s;
}
.primary:hover { transform: translateY(-1px); box-shadow: 0 12px 34px rgba(45, 212, 191, 0.36); }
.primary:disabled { opacity: .5; cursor: not-allowed; }
.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 15px 30px;
  font-weight: 600;
  font-size: 17px;
  cursor: pointer;
  transition: border-color .12s, background .12s;
}
.ghost:hover { border-color: var(--primary); background: var(--panel); }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin: 40px 0 20px; }
.feature-point { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 24px; }
.feature-point b { display: block; color: var(--primary); margin-bottom: 10px; font-size: 16px; }
.feature-point span { color: var(--muted); font-size: 14.5px; line-height: 1.6; }

/* ---------- Cards / app ---------- */
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 30px;
  margin-bottom: 36px;
}
h2 { margin: 0 0 16px; font-size: 21px; line-height: 1.3; }
h3 { margin: 0 0 10px; font-size: 16px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
p { margin: 0 0 14px; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 36px;
  text-align: center;
  margin: 26px 0;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.dropzone.dragover { border-color: var(--primary); background: rgba(45, 212, 191, 0.06); }
.dz-icon { font-size: 30px; color: var(--primary); }
.link { background: none; border: none; color: var(--primary); cursor: pointer; text-decoration: underline; padding: 0; font-size: inherit; }

.fields { display: grid; gap: 20px; }
.fields label { display: grid; gap: 7px; font-size: 14px; color: var(--muted); }
textarea, input[type="text"], input[type="email"], input[type="password"] {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 9px;
  color: var(--text);
  padding: 12px 14px;
  font: inherit;
  line-height: 1.5;
  resize: vertical;
}

.actions { display: flex; align-items: center; gap: 16px; margin-top: 26px; }

/* Results */
.hidden { display: none; }
.signals { display: flex; flex-wrap: wrap; gap: 14px; }
.chip { background: var(--panel-2); border: 1px solid var(--border); border-radius: 9px; padding: 14px 18px; }
.chip b { display: block; font-size: 12px; color: var(--muted); font-weight: 600; letter-spacing: .5px; margin-bottom: 3px; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
@media (max-width: 820px) { .two-col { grid-template-columns: 1fr; } }

.match { border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; margin-bottom: 16px; background: var(--panel-2); }
.match .top { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.match .rank { color: var(--primary); font-weight: 800; margin-right: 10px; }
.match .title { font-weight: 700; }
.match .score { font-weight: 800; color: var(--blue); }
.badge { font-size: 12px; padding: 3px 10px; border-radius: 20px; font-weight: 600; }
.badge.experience-validated { background: #0f2f22; color: var(--green); }
.badge.aptitude-validated { background: #241d3d; color: var(--purple); }
.badge.weak { background: #33201f; color: var(--red); }
.match .meta { font-size: 13px; color: var(--muted); margin-top: 10px; line-height: 1.5; }
.match .desc { font-size: 14px; margin-top: 10px; color: #cdd4e0; line-height: 1.6; }

#map { height: 520px; border-radius: 12px; background: var(--panel-2); border: 1px solid var(--border); }

/* Auth */
.auth-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.auth-row input { flex: 1 1 170px; min-width: 140px; }
.auth-row button { white-space: nowrap; }
#registerBtn, #logoutBtn {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 9px;
  padding: 12px 16px;
  cursor: pointer;
  font-weight: 600;
}
#registerBtn:hover, #logoutBtn:hover { border-color: var(--primary); }

/* Email verification banner */
#verifyBanner { margin-top: 16px; padding: 12px 16px; background: rgba(251, 191, 36, 0.08); border: 1px solid var(--amber); border-radius: 9px; font-size: 14px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; line-height: 1.5; }

/* Expanded matches */
.expanded-item { padding: 14px 0; border-bottom: 1px solid var(--border); }
.expanded-item:last-child { border-bottom: none; }
.expanded-item a { color: var(--blue); text-decoration: none; font-weight: 600; }
.expanded-item a:hover { text-decoration: underline; }
.expanded-item .meta { font-size: 13px; color: var(--muted); margin-top: 5px; }

/* Node details panel */
.node-details { margin-top: 18px; background: var(--panel-2); border: 1px solid var(--border); border-radius: 12px; padding: 18px; font-size: 14px; }
.nd-head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.nd-type { font-size: 11px; text-transform: uppercase; letter-spacing: 0.6px; color: var(--primary); background: rgba(45, 212, 191, 0.1); padding: 4px 8px; border-radius: 5px; }
.nd-kv { list-style: none; margin: 0 0 12px; padding: 0; }
.nd-kv li { display: flex; gap: 14px; padding: 6px 0; border-bottom: 1px solid var(--border); }
.nd-kv li:last-child { border-bottom: none; }
.nd-kv .k { color: var(--muted); min-width: 100px; }
.nd-conns { margin-top: 14px; }
.nd-conns ul { list-style: none; padding: 0; margin: 6px 0 0; }
.nd-conns li { color: var(--muted); padding: 3px 0; }
.node-details a { color: var(--blue); }
.node-details p { margin: 6px 0; line-height: 1.6; }

/* Frameworks explainers */
#frameworks details { border-top: 1px solid var(--border); padding: 16px 0; }
#frameworks details:first-of-type { border-top: none; }
#frameworks summary { cursor: pointer; font-weight: 600; color: var(--primary); font-size: 16px; }
#frameworks details p { margin: 10px 0 0; color: var(--muted); line-height: 1.7; }