/* variant-a.css — Стили лендинга (Вариант А) */
/* Версия: 1.0.4 | Зависит от: core.css */

/* ===== BACKGROUND EFFECTS ===== */
.bg-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at top, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
}

.grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(37, 99, 235, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  z-index: -1;
  pointer-events: none;
}

/* ===== HERO-СЕКЦИЯ ===== */
.hero-section {
  padding: calc(var(--header-height) + clamp(2rem, 5vw, 4rem)) var(--container-padding) clamp(2rem, 5vw, 4rem);
  text-align: center;
  position: relative;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.hero-image {
  max-width: 100%;
  border-radius: 1rem;
  margin: 2rem auto 0;
  filter: drop-shadow(0 20px 40px var(--shadow-color));
}

/* ===== КНОПКИ (компонентные стили) ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: clamp(0.75rem, 2vw, 0.875rem) clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 600;
  font-size: clamp(0.9375rem, 1.5vw, 1rem);
  border-radius: var(--border-radius);
  background: var(--gradient);
  color: white;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow);
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn:active {
  transform: translateY(0);
}
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: white;
}

/* ===== ПРЕИМУЩЕСТВА ===== */
.features-section {
  padding: clamp(3rem, 6vw, 4rem) var(--container-padding);
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}
.feature-card {
  padding: clamp(1.25rem, 3vw, 1.75rem);
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--border-radius-lg);
  transition: var(--transition);
}
.feature-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.feature-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  border-radius: 12px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}
.feature-title {
  font-weight: 600;
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}
.feature-desc {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* ===== ДЕМО-ПРЕВЬЮ ===== */
.demo-preview {
  padding: clamp(2rem, 4vw, 4rem) var(--container-padding);
  text-align: center;
}
.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  max-width: 1000px;
  margin: 2rem auto 0;
}
.preview-card {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}
.preview-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
}
.preview-card img {
  width: 100%;
  height: auto;
  display: block;
}
.preview-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.75rem;
  background: linear-gradient(to top, rgba(15,23,42,0.95), transparent);
  color: white;
  font-weight: 500;
  font-size: 0.875rem;
}

/* ===== CTA-СЕКЦИЯ ===== */
.cta-section {
  padding: clamp(3rem, 6vw, 4rem) var(--container-padding);
  text-align: center;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cta-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 1rem;
}
.cta-desc {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto 2rem;
}

/* ===== ФОРМЫ (компонентные стили) ===== */
.lead-form {
  max-width: 480px;
  margin: 0 auto;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--border-radius-lg);
  padding: clamp(1rem, 3vw, 1.5rem);
}
.form-group {
  margin-bottom: 1.25rem;
}
.form-input {
  width: 100%;
  padding: clamp(0.75rem, 2vw, 0.875rem) 1rem;
  font-size: 1rem;
  font-family: inherit;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  transition: var(--transition-fast);
}
.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}
.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin: 1rem 0;
}
.form-checkbox input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.125rem;
  accent-color: var(--primary);
}
.form-checkbox label {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.4;
}
.form-checkbox a {
  color: var(--primary);
  text-decoration: underline;
}

/* ===== АДАПТИВ ===== */
@media (max-width: 768px) {
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  .btn {
    width: 100%;
    max-width: 280px;
  }
}