:root {
  --bg: #0b1020;
  --panel: #141b2d;
  --panel-2: #1b2640;
  --text: #edf3ff;
  --muted: #b0bfdc;
  --primary: #5aa9ff;
  --primary-2: #8fd3ff;
  --success: #2dd4bf;
  --danger: #ff6b6b;
  --border: rgba(255,255,255,0.08);
  --shadow: 0 18px 40px rgba(0,0,0,0.25);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #0b1020 0%, #121a2d 100%);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }

.app-shell {
  min-height: 100vh;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 14, 26, 0.8);
  backdrop-filter: blur(10px);
}

.brand {
  font-size: 1.2rem;
  font-weight: 700;
}

.nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
}

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 40px 20px;
}

.hero {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px;
  box-shadow: var(--shadow);
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
}

.hero p {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 1.05rem;
}

.verify-form {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.verify-form input {
  flex: 1 1 420px;
  min-height: 52px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 0 16px;
  font-size: 1rem;
}

.verify-form button {
  min-height: 52px;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #081421;
  font-weight: 700;
  font-size: 1rem;
  padding: 0 22px;
  cursor: pointer;
}

.result {
  margin-top: 24px;
  min-height: 80px;
  padding: 18px;
  border-radius: 12px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  color: var(--muted);
}

.result.success {
  border-color: rgba(45, 212, 191, 0.5);
  color: #dffdf8;
  background: rgba(45, 212, 191, 0.08);
}

.result.error {
  border-color: rgba(255, 107, 107, 0.5);
  color: #ffe6e6;
  background: rgba(255, 107, 107, 0.08);
}

@media (max-width: 640px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .nav {
    gap: 10px;
    flex-wrap: wrap;
  }

  .hero {
    padding: 22px 18px;
  }

  .verify-form {
    flex-direction: column;
  }

  .verify-form button,
  .verify-form input {
    width: 100%;
  }
}