/* ========================================
   sunbank.io — Dark Premium Theme
   ======================================== */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-card: #16161f;
  --bg-card-hover: #1c1c28;
  --text-primary: #f0ece4;
  --text-secondary: #9d9a93;
  --text-muted: #6b6860;
  --gold: #c9a84c;
  --gold-light: #e4c76b;
  --gold-dark: #a8892e;
  --gold-glow: rgba(201, 168, 76, 0.15);
  --border: #2a2a35;
  --border-focus: #c9a84c;
  --radius: 8px;
  --radius-lg: 16px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Language Nav ---- */
.lang-nav {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  display: flex;
  gap: 4px;
  background: rgba(16, 16, 24, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 4px;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-sans);
  letter-spacing: 0.02em;
}

.lang-btn:hover {
  color: var(--text-primary);
}

.lang-btn.active {
  background: var(--gold);
  color: var(--bg-primary);
  font-weight: 600;
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 80px 0;
}

.hero-glow {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--gold-glow) 0%, transparent 70%);
  pointer-events: none;
  animation: pulse 6s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.15); }
}

.hero-label {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 24px;
}

.domain-name {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 7rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.domain-sun { color: var(--gold-light); }
.domain-bank { color: var(--text-primary); }
.domain-dot { color: var(--text-muted); }
.domain-io { color: var(--gold); }

.hero-tagline {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.cta-button {
  display: inline-block;
  padding: 16px 48px;
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  color: var(--bg-primary);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border-radius: 50px;
  transition: all var(--transition);
  letter-spacing: 0.03em;
  border: none;
  cursor: pointer;
}

.cta-button:hover {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(201, 168, 76, 0.25);
}

/* ---- Features ---- */
.features {
  padding: 100px 0;
}

.section-title {
  text-align: center;
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-subtitle {
  text-align: center;
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--gold-dark);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 24px;
  color: var(--gold);
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---- Inquiry Form ---- */
.inquiry {
  padding: 80px 0 120px;
}

.inquiry-form {
  max-width: 640px;
  margin: 48px auto 0;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--gold-glow);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b6860' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
  cursor: pointer;
}

.form-group select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.submit-button {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  color: var(--bg-primary);
  font-weight: 600;
  font-size: 15px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.03em;
  font-family: var(--font-sans);
}

.submit-button:hover {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  box-shadow: 0 4px 20px rgba(201, 168, 76, 0.2);
}

.submit-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-status {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  text-align: center;
}

.form-status.success {
  background: rgba(76, 175, 80, 0.1);
  border: 1px solid rgba(76, 175, 80, 0.3);
  color: #81c784;
}

.form-status.error {
  background: rgba(244, 67, 54, 0.1);
  border: 1px solid rgba(244, 67, 54, 0.3);
  color: #e57373;
}

/* ---- Footer ---- */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.footer-text {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .hero-tagline {
    font-size: 16px;
    padding: 0 16px;
  }

  .lang-nav {
    top: 12px;
    right: 12px;
  }

  .lang-btn {
    padding: 5px 10px;
    font-size: 11px;
  }
}

@media (max-width: 480px) {
  .domain-name {
    font-size: 2.5rem;
  }

  .feature-card {
    padding: 24px;
  }
}