/* ==========================================================
   Стили лендинга: Архитектура ИИ-агентов на базе RAG
   Дизайн-система: Мудрец + Творец + Правитель
   Кастомизация Bootstrap 5 — тёмная технологичная тема
   ========================================================== */

:root {
  --color-bg: #0b0e17;
  --color-bg-secondary: #111827;
  --color-surface: #1f2937;
  --color-border: rgba(56, 189, 248, 0.15);
  --color-border-hover: rgba(56, 189, 248, 0.35);
  --color-primary: #38bdf8;
  --color-primary-dark: #0ea5e9;
  --color-secondary: #818cf8;
  --color-accent: #2dd4bf;
  --color-text: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-success: #34d399;
  --color-warning: #fbbf24;
  --color-danger: #f87171;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

body {
  background-color: var(--color-bg) !important;
  color: var(--color-text) !important;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Navbar */
.navbar {
  background: rgba(11, 14, 23, 0.92) !important;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

.navbar-brand span {
  color: var(--color-primary);
}

.navbar .nav-link {
  color: var(--color-text-secondary) !important;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 0.375rem;
  padding: 0.5rem 0.75rem !important;
  transition: color 0.2s ease, background 0.2s ease;
}

.navbar .nav-link:hover,
.navbar .nav-link:focus,
.navbar .nav-link.active {
  color: var(--color-text) !important;
  background: rgba(56, 189, 248, 0.08);
}

.navbar-toggler {
  border: none !important;
  padding: 0.5rem !important;
}

.navbar-toggler:focus {
  box-shadow: none !important;
}

@media (max-width: 991.98px) {
  .navbar-collapse {
    background: rgba(11, 14, 23, 0.98);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem;
    border-radius: 0 0 0.75rem 0.75rem;
  }
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 10% 50%, rgba(56, 189, 248, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 90% 30%, rgba(129, 140, 248, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(45, 212, 191, 0.03) 0%, transparent 50%);
  pointer-events: none;
}

.hero-grid-decoration {
  position: absolute;
  right: -10%;
  top: 20%;
  width: 600px;
  height: 600px;
  opacity: 0.08;
  background-image:
    linear-gradient(var(--color-primary) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-primary) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary)) !important;
  border-color: var(--color-primary) !important;
  color: #0b0e17 !important;
  font-weight: 600 !important;
}

.btn-primary:hover,
.btn-primary:focus {
  box-shadow: 0 0 30px rgba(56, 189, 248, 0.3) !important;
  transform: translateY(-2px);
}

.btn-outline-primary {
  color: var(--color-primary) !important;
  border-color: var(--color-border) !important;
  font-weight: 600 !important;
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
  background: rgba(56, 189, 248, 0.08) !important;
  border-color: var(--color-primary) !important;
  color: var(--color-primary) !important;
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* Accordion */
.accordion-item {
  background: rgba(17, 24, 39, 0.85) !important;
  border: 1px solid var(--color-border) !important;
  border-radius: 0.75rem !important;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.accordion-button {
  background: rgba(17, 24, 39, 0.5) !important;
  color: var(--color-text) !important;
  font-weight: 500 !important;
  font-size: 1rem !important;
  box-shadow: none !important;
}

.accordion-button:not(.collapsed) {
  background: rgba(17, 24, 39, 0.7) !important;
  color: var(--color-primary) !important;
}

.accordion-button::after {
  filter: invert(0.7) brightness(1.5);
}

.accordion-button:not(.collapsed)::after {
  filter: invert(0.5) sepia(1) hue-rotate(180deg) saturate(3);
}

.accordion-button:focus {
  box-shadow: none !important;
  border-color: var(--color-border) !important;
}

.accordion-body {
  background: rgba(11, 14, 23, 0.4);
  color: var(--color-text) !important;
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* Forms */
.form-control,
.form-select {
  background-color: var(--color-bg) !important;
  border-color: var(--color-border) !important;
  color: var(--color-text) !important;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--color-primary) !important;
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12) !important;
}

.form-control::placeholder {
  color: var(--color-text-muted) !important;
}

.form-check-input {
  background-color: var(--color-bg) !important;
  border-color: var(--color-border) !important;
}

.form-check-input:checked {
  background-color: var(--color-primary) !important;
  border-color: var(--color-primary) !important;
}

.form-check-label {
  color: var(--color-text) !important;
  font-size: 0.875rem;
}

.form-label {
  color: var(--color-text) !important;
  font-size: 0.875rem;
  font-weight: 500;
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-dark {
  background-color: var(--color-bg-secondary) !important;
}

/* Utilities */
.font-mono {
  font-family: var(--font-mono) !important;
}

.tracking-wider {
  letter-spacing: 0.05em;
}

.hover-border:hover {
  border-color: var(--color-border-hover) !important;
}

.hover-lift:hover {
  transform: translateY(-3px);
}

/* Hero price */
.hero-price {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  background: rgba(17, 24, 39, 0.85);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
}

/* Footer - fix contrast */
.footer {
  color: var(--color-text) !important;
}

.footer-info {
  color: var(--color-text-secondary) !important;
}

.footer-info strong {
  color: var(--color-text) !important;
}

.footer a {
  color: var(--color-text-secondary) !important;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer a:hover {
  color: var(--color-primary) !important;
}

.footer-contacts {
  color: var(--color-text-secondary) !important;
}

.footer-contacts a {
  color: var(--color-text-secondary) !important;
}

.footer-bottom {
  color: var(--color-text-secondary) !important;
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 1rem 1.5rem;
  transform: translateY(100%);
  transition: transform 0.4s ease;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
}

.cookie-banner.visible {
  transform: translateY(0);
}

/* Problem block - fix contrast */
.problem-card .problem-text {
  color: var(--color-text) !important;
}

/* Format block - fix contrast */
.format-item .format-text {
  color: var(--color-text) !important;
}

/* Package legal checkboxes */
.pkg-legal-checks .form-check-label {
  color: var(--color-text-secondary) !important;
  font-size: 0.75rem !important;
}
.pkg-legal-checks .form-check-label a {
  color: var(--color-primary) !important;
}
.pkg-legal-checks .form-check-input {
  margin-top: 0.15em;
}

/* Payment note - fix contrast */
.form-payment-note {
  color: var(--color-text) !important;
}

/* Package result block - use primary color instead of green */
.package-result-text,
.package-card .text-success {
  color: var(--color-primary) !important;
}

/* Success icon in form - use primary color */
.form-success .text-success,
.form-success .success-icon {
  color: var(--color-primary) !important;
}

/* Program accordion - use primary instead of green */
.program-result .text-success,
.accordion-body .text-success {
  color: var(--color-primary) !important;
}

/* Strong contrast for footer paragraphs with text-muted class */
.footer .text-muted,
.footer .text-secondary,
.footer-bottom {
  color: var(--color-text-secondary) !important;
}
.footer a.text-muted {
  color: var(--color-text-secondary) !important;
}
.footer strong.text-secondary {
  color: var(--color-text) !important;
}

/* Legal page date contrast */
.legal-date,
.navbar .text-muted {
  color: var(--color-text-secondary) !important;
}

/* FAQ answer - fix contrast */
.accordion-body p {
  color: var(--color-text) !important;
}

/* Form validation states */
.form-control.is-valid,
.form-select.is-valid {
  border-color: var(--color-success) !important;
  box-shadow: 0 0 0 2px rgba(52, 211, 153, 0.15) !important;
}

.form-control.is-invalid,
.form-select.is-invalid {
  border-color: var(--color-danger) !important;
  box-shadow: 0 0 0 2px rgba(248, 113, 113, 0.15) !important;
}

.form-error {
  font-size: 0.8125rem;
  line-height: 1.4;
  min-height: 1.2em;
}

/* Media */
@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: 5rem 0 3rem;
  }

  .section {
    padding: 3rem 0;
  }

  .hero-grid-decoration {
    display: none;
  }
}

@media (max-width: 576px) {
  .hero-price {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    width: 100%;
  }
}