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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background: #0a0a0a;
  color: #f5f5f5;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* === Hero === */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 24px 80px;
}

.hero-text {
  font-size: clamp(1.8rem, 5vw, 3.2rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

/* === Video === */
.video-container {
  width: 100%;
  max-width: 900px;
}

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  border-radius: 4px;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* === Scroll Hint === */
.scroll-hint {
  margin-top: 40px;
  color: #555;
  text-decoration: none;
  animation: bounce 2s ease infinite;
  transition: color 0.3s ease;
}

.scroll-hint:hover {
  color: #f5f5f5;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(10px); }
}

/* === CTA === */
.cta {
  padding: 100px 24px;
  display: flex;
  justify-content: center;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.cta.visible {
  opacity: 1;
  transform: translateY(0);
}

.cta-content {
  max-width: 480px;
  width: 100%;
  text-align: center;
}

.cta-heading {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 600;
  margin-bottom: 12px;
}

.cta-sub {
  font-size: 1rem;
  color: #aaa;
  margin-bottom: 40px;
}

/* === Form === */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form-field {
  text-align: left;
}

.form-field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: #888;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-field .optional {
  text-transform: none;
  letter-spacing: normal;
  color: #555;
}

.form-field input {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid #333;
  color: #f5f5f5;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  padding: 10px 0;
  transition: border-color 0.3s ease;
  outline: none;
}

.form-field input:focus {
  border-bottom-color: #f5f5f5;
}

.submit-btn {
  margin-top: 16px;
  padding: 14px 48px;
  background: #f5f5f5;
  color: #0a0a0a;
  border: none;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: background 0.3s ease;
  align-self: center;
}

.submit-btn:hover {
  background: #ddd;
}

.submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* === Success Message === */
.success-message {
  font-size: 1.2rem;
  font-weight: 500;
  padding: 40px 0;
}

/* === Series Link === */
.series-link {
  padding: 60px 24px;
  text-align: center;
  font-size: 0.95rem;
  color: #666;
}

.series-link a {
  color: #aaa;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.3s ease;
}

.series-link a:hover {
  color: #f5f5f5;
}

/* === Footer === */
.site-footer {
  padding: 40px 24px;
  text-align: center;
  font-size: 0.8rem;
  color: #444;
  border-top: 1px solid #1a1a1a;
}

/* === Mobile === */
@media (max-width: 640px) {
  .hero {
    padding: 40px 16px 60px;
  }

  .cta {
    padding: 60px 16px;
  }

  .submit-btn {
    width: 100%;
  }
}