/* Блок 1 — Hero */

#hero {
  background: var(--color-dark-bg);
  min-height: 100vh;
  min-height: 100dvh; /* iOS Safari fix */
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
}

/* Radial gradient overlay */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(74,159,216,0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-lg);
  align-items: center;
  padding: var(--section-spacing-desktop) 0;
}

/* Левая колонка — текст и форма */
.hero-content {
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp 600ms var(--ease-default) forwards;
}

.hero-content h1 {
  color: var(--color-dark-text);
  margin-bottom: var(--gap-md);
}

.hero-content h1 .accent {
  color: var(--color-dark-accent);
  font-weight: 700;
}

.hero-content .subtitle {
  color: var(--color-dark-text-secondary);
  font-size: var(--fs-lead);
  line-height: 1.5;
  max-width: 600px;
  margin-bottom: var(--gap-lg);
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp 600ms var(--ease-default) 100ms forwards;
}

/* Форма Hero */
.hero-form {
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp 600ms var(--ease-default) 200ms forwards;
}

.hero-form form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-sm);
  max-width: 600px;
}

.hero-form .form-group {
  display: flex;
  flex-direction: column;
}

.hero-form label {
  font-size: var(--fs-small);
  font-weight: 500;
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--gap-xs);
}

.hero-form input {
  border: 1px solid var(--color-dark-border);
  background: var(--color-dark-input-bg);
  color: var(--color-dark-text);
  padding: 12px 16px;
  border-radius: var(--border-radius-input);
  font-size: 16px;
  transition: border-color var(--duration-fast) var(--ease-default);
}

.hero-form input::placeholder {
  color: rgba(255,255,255,0.4);
}

.hero-form input:hover {
  border-color: rgba(255,255,255,0.3);
}

.hero-form input:focus {
  border: 2px solid var(--color-dark-accent);
  padding: 11px 15px;
  box-shadow: 0 0 0 3px rgba(74,159,216,0.2);
}

.hero-form button[type="submit"] {
  grid-column: 1 / -1;
  background: var(--color-dark-accent);
  color: var(--color-dark-text);
  padding: 16px 32px;
  border-radius: var(--border-radius-button);
  font-size: 16px;
  font-weight: 600;
  width: 100%;
  margin-top: var(--gap-xs);
  transition: all var(--duration-fast) var(--ease-default);
}

.hero-form button[type="submit"]:hover {
  background: var(--color-dark-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-button-hover);
}

.hero-form button[type="submit"]:active {
  transform: translateY(0);
  box-shadow: 0 4px 8px rgba(74,159,216,0.2);
}

.hero-form button[type="submit"]:disabled {
  opacity: 0.7;
  pointer-events: none;
}

/* Правая колонка — визуал */
.hero-visual {
  opacity: 0;
  animation: fadeIn 800ms var(--ease-default) 300ms forwards;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual img {
  max-width: 600px;
  width: 100%;
  height: auto;
}

/* Placeholder для изображения */
.hero-visual .image-placeholder {
  width: 600px;
  height: 450px;
  background: rgba(255,255,255,0.05);
  border: 1px dashed rgba(255,255,255,0.2);
  border-radius: var(--border-radius-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.4);
  font-size: var(--fs-small);
}

/* Анимации */
@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

/* Градиентный переход к следующему блоку */
.hero-gradient-transition {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to bottom,
    var(--color-dark-bg) 0%,
    #1a1a1a 30%,
    #f7f6f3 70%,
    var(--color-canvas-primary) 100%);
  pointer-events: none;
}

/* Tablet */
@media (max-width: 1439px) {
  .hero-container {
    grid-template-columns: 60% 40%;
    padding: var(--section-spacing-tablet) 0;
  }

  .hero-visual img,
  .hero-visual .image-placeholder {
    max-width: 400px;
    height: 300px;
  }
}

/* Mobile */
@media (max-width: 767px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--gap-lg);
    padding: var(--section-spacing-mobile) 0;
  }

  .hero-content .subtitle {
    font-size: 17px;
  }

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

  .hero-visual {
    order: 4;
  }

  .hero-visual img,
  .hero-visual .image-placeholder {
    max-width: 80%;
    height: auto;
    aspect-ratio: 4/3;
  }

  /* Sticky CTA на mobile появляется после скролла */
  .sticky-cta {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    background: var(--color-dark-accent);
    color: var(--color-dark-text);
    padding: 14px 28px;
    border-radius: var(--border-radius-button);
    font-size: 15px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    transition: all var(--duration-fast) var(--ease-default);
  }

  .sticky-cta.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateX(-50%) translateY(20px);
  }

  .sticky-cta:hover {
    background: var(--color-dark-accent-hover);
    transform: translateX(-50%) translateY(-2px);
  }
}

/* Success/Error states */
.form-success,
.form-error {
  grid-column: 1 / -1;
  padding: 16px;
  border-radius: var(--border-radius-input);
  font-size: var(--fs-small);
  margin-top: var(--gap-sm);
}

.form-success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.form-error {
  background: var(--color-error-bg);
  color: var(--color-error);
  border: 1px solid var(--color-error);
}