:root {
  color-scheme: dark;
  --bg: #0b1220;
  --panel: #121e30;
  --line: #26374e;
  --text: #e8f0fa;
  --muted: #9fb1c9;
  --accent: #63e0c0;
  --accent-dim: #2f6d68;
  --danger: #f07178;
  --warning: #e6c07b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(circle at top right, #17334a, var(--bg) 45%);
  font: 16px/1.55 system-ui, -apple-system, sans-serif;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  padding: 16px 0;
}
.header-inner {
  max-width: 1100px;
  margin: auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.logo { color: var(--text); text-decoration: none; }
.logo .tag {
  display: block;
  color: var(--accent);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.logo strong { font-size: 1.35rem; }
nav { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
nav a { color: var(--muted); font-size: 0.95rem; }
nav a:hover { color: var(--accent); }

/* Buttons */
.btn-accent, .btn-outline, .btn-danger {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  text-decoration: none !important;
}
.btn-accent {
  background: var(--accent);
  color: #0b1220 !important;
}
.btn-accent:hover { filter: brightness(1.1); }
.btn-outline {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text) !important;
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent) !important; }
.btn-danger { background: var(--danger); color: #fff !important; }
.btn-block { width: 100%; text-align: center; }
.btn-lg { padding: 12px 28px; font-size: 1rem; }

/* Layout */
main {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: auto;
  padding: 28px 20px;
}
footer {
  border-top: 1px solid var(--line);
  padding: 20px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Cards & grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin: 24px 0;
}
.card {
  background: linear-gradient(145deg, #15243a, #101a2a);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
}
.card h2, .card h3 { font-size: 1.08rem; margin-top: 0; }
.card p { color: var(--muted); margin-bottom: 0; }
.pill {
  display: inline-block;
  border: 1px solid var(--accent-dim);
  border-radius: 99px;
  padding: 4px 10px;
  color: var(--accent);
  font-size: 0.8rem;
}

/* Hero */
.hero h1 {
  margin: 0.25rem 0;
  font-size: clamp(2rem, 5vw, 3.2rem);
}
.intro { color: var(--muted); max-width: 720px; }

/* Forms */
.form-card {
  max-width: 420px;
  margin: 40px auto;
}
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #08101b;
  color: var(--text);
  font-size: 1rem;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-error {
  background: rgba(240, 113, 120, 0.15);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
  display: none;
}
.form-success {
  background: rgba(99, 224, 192, 0.12);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
  display: none;
}
.g-recaptcha { margin: 16px 0; }

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}
th { color: var(--muted); font-weight: 600; }

/* Admin tabs */
.tabs { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.tab {
  padding: 8px 16px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  cursor: pointer;
}
.tab.active {
  background: var(--accent);
  color: #0b1220;
  border-color: var(--accent);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* Plan cards */
.plan-card {
  text-align: center;
  position: relative;
}
.plan-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 24px rgba(99, 224, 192, 0.15);
}
.plan-price {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent);
  margin: 12px 0 4px;
}
.plan-price span { font-size: 0.9rem; color: var(--muted); font-weight: 400; }
.plan-features {
  list-style: none;
  padding: 0;
  margin: 16px 0;
  text-align: left;
  color: var(--muted);
}
.plan-features li { padding: 4px 0; }
.plan-features li::before { content: "✓ "; color: var(--accent); }

/* Utilities */
.muted { color: var(--muted); }
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-2 { margin-bottom: 16px; }
.flex { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
  background: var(--accent-dim);
  color: var(--accent);
}

/* Predict result */
.result-box {
  background: #08101b;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px;
  margin-top: 16px;
  font-family: ui-monospace, monospace;
  font-size: 0.9rem;
  white-space: pre-wrap;
  max-height: 400px;
  overflow: auto;
}