/* ── Custom Properties ── */
:root {
  --bg: #0a0a0f;
  --text: #e8e8ef;
  --text-muted: #8888a0;
  --accent-teal: #00d4aa;
  --accent-blue: #4a7dff;
  --accent-purple: #7b5cff;
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: 20px;
  --radius: 14px;
}

/* ── Reset & Base ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Canvas Background ── */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

/* ── Main Layout ── */
main {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem;
  text-align: center;
}

/* ── Brand ── */
.brand {
  font-size: clamp(3.5rem, 10vw, 7rem);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 1rem;
}

.brand-travel {
  font-weight: 300;
}

.brand-360 {
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-blue));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ── Tagline ── */
.tagline {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  font-weight: 300;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin-bottom: 3rem;
}

/* ── Form Container (Glassmorphism) ── */
.form-container {
  width: 100%;
  max-width: 480px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 6px;
  margin-bottom: 3rem;
}

.input-group {
  display: flex;
  gap: 6px;
}

/* ── Email Input ── */
#email-input {
  flex: 1;
  background: transparent;
  border: 1px solid transparent;
  border-radius: calc(var(--radius) - 4px);
  padding: 0.85rem 1.2rem;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text);
  outline: none;
  transition: border-color 0.3s ease;
}

#email-input::placeholder {
  color: var(--text-muted);
}

#email-input:focus {
  border-color: rgba(0, 212, 170, 0.3);
  box-shadow: 0 0 20px rgba(0, 212, 170, 0.06);
}

/* ── Submit Button ── */
#submit-btn {
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-blue));
  color: #fff;
  border: none;
  border-radius: calc(var(--radius) - 4px);
  padding: 0.85rem 1.6rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#submit-btn:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 24px rgba(0, 212, 170, 0.25);
}

#submit-btn:active {
  transform: scale(0.98);
}

#submit-btn.submitted {
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-purple));
  pointer-events: none;
}

/* ── Social Links ── */
.socials {
  display: flex;
  gap: 1.5rem;
}

.social-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.3s ease, transform 0.2s ease;
  display: flex;
  align-items: center;
}

.social-link:hover {
  color: var(--text);
  transform: translateY(-2px);
}

/* ── Staggered Fade-In Animation ── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: var(--delay, 0s);
}

/* ── Responsive ── */
@media (max-width: 540px) {
  .input-group {
    flex-direction: column;
  }

  #submit-btn {
    width: 100%;
    padding: 0.9rem;
  }

  .form-container {
    max-width: 100%;
  }

  .tagline {
    margin-bottom: 2.5rem;
  }
}