/* ============================================================
   ДИЗАЙН-СИСТЕМА «НАВИГАТОР ОБРАЗОВАНИЯ» ВИФИП
   ============================================================ */

:root {
  /* Палитра */
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-subtle: #f1f5f9;
  --color-surface: #ffffff;
  --color-surface-hover: #f8fafc;
  
  --color-text-main: #0f172a;       /* Насыщенный графитовый */
  --color-text-muted: #475569;      /* Читаемый вспомогательный текст */
  --color-text-subtle: #64748b;     /* Мягкий подстрочный текст */
  --color-border: #e2e8f0;          /* Аккуратная рамка */
  --color-border-light: #f1f5f9;

  /* Акцентный цвет: насыщенный циановый / бирюзово-голубой */
  --color-accent: #0891b2;          /* Cyan 600 */
  --color-accent-hover: #0e7490;    /* Cyan 700 */
  --color-accent-active: #155e75;   /* Cyan 800 */
  --color-accent-light: #ecfeff;    /* Cyan 50 */
  --color-accent-border: #a5f3fc;   /* Cyan 200 */
  --color-accent-ring: rgba(8, 145, 178, 0.35);

  /* Статусные цвета */
  --color-success: #059669;
  --color-success-bg: #ecfdf5;
  --color-error: #dc2626;
  --color-error-bg: #fef2f2;
  --color-warning: #d97706;
  --color-warning-bg: #fffbeb;

  /* Типографика */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --line-height-base: 1.6;
  --line-height-tight: 1.25;

  /* Сетки и размеры */
  --container-max-width: 1200px;
  --header-height: 72px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 9999px;

  /* Тени */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);

  /* Переходы */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* Сброс базовых стилей */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: var(--line-height-base);
  color: var(--color-text-main);
  background-color: var(--color-bg);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1 0 auto;
}

/* Доступность: видимый фокус */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Контейнер */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Типографика */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-main);
  line-height: var(--line-height-tight);
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 4vw + 1rem, 3.25rem);
  font-weight: 800;
  margin-bottom: 20px;
}

h2 {
  font-size: clamp(1.75rem, 2.5vw + 0.5rem, 2.35rem);
  margin-bottom: 16px;
}

h3 {
  font-size: clamp(1.25rem, 1.5vw + 0.5rem, 1.5rem);
  margin-bottom: 12px;
}

p {
  margin-bottom: 16px;
  color: var(--color-text-muted);
}

p.lead {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--color-text-main);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
}

/* Кнопки */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.975rem;
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff !important;
  box-shadow: 0 2px 4px rgba(8, 145, 178, 0.25);
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(8, 145, 178, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: var(--color-bg-subtle);
  color: var(--color-text-main) !important;
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: #e2e8f0;
  color: var(--color-text-main) !important;
}

.btn-outline {
  background-color: transparent;
  color: var(--color-accent) !important;
  border-color: var(--color-accent);
}

.btn-outline:hover {
  background-color: var(--color-accent-light);
}

.btn-white {
  background-color: #ffffff;
  color: var(--color-accent) !important;
}

.btn-white:hover {
  background-color: #f8fafc;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}

.btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  transform: none !important;
}

/* Бейджи и метки */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  background-color: var(--color-accent-light);
  color: var(--color-accent-hover);
  border: 1px solid var(--color-accent-border);
  line-height: 1.3;
}

.badge-outline {
  background: transparent;
  color: var(--color-text-subtle);
  border-color: var(--color-border);
}

.badge-warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
  border-color: #fde68a;
}

/* Заполнитель: понятная индикация редактируемого блока */
.placeholder-callout {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  background-color: #f8fafc;
  border: 1px dashed #cbd5e1;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  font-size: 0.875rem;
  color: var(--color-text-subtle);
}

.placeholder-callout svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  color: #64748b;
}

/* ============================================================
   ШАПКА САЙТА (HEADER)
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-fast);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0891b2, #0284c7);
  color: #ffffff;
  border-radius: var(--radius-md);
  font-weight: 800;
  font-size: 1.1rem;
}

.logo-text-group {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-text-main);
  line-height: 1.2;
}

.logo-subtitle {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: nowrap;
}

.nav-link {
  padding: 8px 10px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--color-accent);
  background-color: var(--color-bg-alt);
}

.nav-link.active {
  color: var(--color-accent);
  font-weight: 600;
  background-color: var(--color-accent-light);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Мобильный гамбургер */
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--color-text-main);
  border-radius: var(--radius-sm);
}

.mobile-menu-btn:hover {
  background-color: var(--color-bg-subtle);
}

/* Мобильное выпадающее меню */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ffffff;
  z-index: 99;
  padding: 24px;
  overflow-y: auto;
  border-top: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  flex-direction: column;
  gap: 8px;
}

.mobile-nav-drawer.open {
  display: flex;
}

.mobile-nav-drawer .nav-link {
  font-size: 1.1rem;
  padding: 12px 16px;
  width: 100%;
}

.mobile-drawer-cta {
  margin-top: 16px;
  width: 100%;
}

/* ============================================================
   ПОДВАЛ САЙТА (FOOTER)
   ============================================================ */
.site-footer {
  background-color: #0b1323;
  color: #cbd5e1;
  padding-top: 60px;
  padding-bottom: 30px;
  margin-top: 80px;
  border-top: 1px solid #1e293b;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 1.05rem;
  margin-bottom: 20px;
  font-weight: 600;
}

.footer-col p {
  color: #94a3b8;
  font-size: 0.925rem;
  line-height: 1.6;
}

.footer-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a {
  color: #94a3b8;
  font-size: 0.925rem;
  transition: color var(--transition-fast);
}

.footer-nav a:hover {
  color: #38bdf8;
}

.footer-contacts-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.925rem;
  color: #94a3b8;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid #1e293b;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: #64748b;
}

.footer-legal-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-legal-links a {
  color: #64748b;
}

.footer-legal-links a:hover {
  color: #cbd5e1;
}

/* ============================================================
   СЕКЦИИ И БЛОКИ
   ============================================================ */
.section {
  padding-top: 72px;
  padding-bottom: 72px;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 48px;
}

.section-header .section-tag {
  margin-bottom: 12px;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--color-text-muted);
}

/* ГЛАВНЫЙ ЭКРАН (HERO) */
.hero-section {
  padding-top: 60px;
  padding-bottom: 72px;
  background: linear-gradient(180deg, #f0fdfa 0%, #ffffff 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.hero-badge-wrap {
  margin-bottom: 16px;
}

.hero-title {
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
}

.hero-card {
  background-color: #ffffff;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-xl);
  padding: 32px;
  position: relative;
  overflow: hidden;
}

.hero-card-pattern {
  position: absolute;
  top: 0;
  right: 0;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(8,145,178,0.12) 0%, transparent 70%);
}

/* КАРТОЧКИ И СЕТКИ */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent-border);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.card-icon svg {
  width: 26px;
  height: 26px;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.card-text {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  flex-grow: 1;
}

/* ФЛАГМАНСКИЙ КУРС БЛОК */
.flagship-banner {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  border-radius: var(--radius-xl);
  padding: 48px;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
  align-items: center;
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.flagship-banner h3 {
  color: #ffffff;
  font-size: 2rem;
  margin-top: 12px;
  margin-bottom: 16px;
}

.flagship-banner p {
  color: #cbd5e1;
  font-size: 1.1rem;
  line-height: 1.6;
  margin-bottom: 28px;
}

.flagship-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.flagship-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px;
  border-radius: var(--radius-lg);
}

.flagship-feat-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.flagship-feat-item svg {
  color: #38bdf8;
  flex-shrink: 0;
  margin-top: 3px;
}

.flagship-feat-item strong {
  display: block;
  color: #ffffff;
  font-size: 0.95rem;
}

.flagship-feat-item span {
  color: #94a3b8;
  font-size: 0.875rem;
}

/* СТРАНИЦА ПРОГРАММЫ: НАПРАВЛЕНИЯ */
.direction-card {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.direction-num {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent);
  opacity: 0.4;
  line-height: 1;
  margin-bottom: 12px;
}

/* ФОРМА И ПОЛЯ */
.form-container {
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 36px;
  box-shadow: var(--shadow-md);
}

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

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 6px;
}

.form-label .req {
  color: var(--color-accent);
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  font-size: 0.975rem;
  font-family: inherit;
  color: var(--color-text-main);
  background-color: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-ring);
  outline: none;
}

.form-control.is-invalid {
  border-color: var(--color-error);
  background-color: #fffaf0;
}

.form-error {
  font-size: 0.8rem;
  color: var(--color-error);
  margin-top: 4px;
}

.checkbox-wrap {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 24px;
}

.checkbox-wrap input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-accent);
  cursor: pointer;
}

.checkbox-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  cursor: pointer;
}

/* АККОРДЕОН (FAQ) */
.accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.accordion-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: #ffffff;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.accordion-item.open {
  border-color: var(--color-accent-border);
}

.accordion-btn {
  width: 100%;
  padding: 18px 24px;
  text-align: left;
  background: transparent;
  border: none;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.accordion-btn:hover {
  background-color: var(--color-bg-alt);
}

.accordion-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base);
}

.accordion-item.open .accordion-icon {
  transform: rotate(180deg);
}

.accordion-body {
  display: none;
  padding: 0 24px 20px 24px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.accordion-item.open .accordion-body {
  display: block;
}

/* МОДАЛЬНОЕ ОКНО */
.modal-backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-backdrop.open {
  display: flex;
}

.modal-dialog {
  background-color: #ffffff;
  border-radius: var(--radius-xl);
  max-width: 540px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  position: relative;
  padding: 36px;
  animation: modalIn 200ms ease-out;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-subtle);
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
}

.modal-close-btn:hover {
  background-color: var(--color-bg-subtle);
  color: var(--color-text-main);
}

/* СТАТУСНЫЙ БАННЕР / ТОСТ */
.status-toast {
  display: none;
  padding: 16px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  font-size: 0.925rem;
  line-height: 1.5;
}

.status-toast.show {
  display: block;
}

.status-toast.success {
  background-color: var(--color-success-bg);
  border: 1px solid #a7f3d0;
  color: #065f46;
}

.status-toast.error {
  background-color: var(--color-error-bg);
  border: 1px solid #fecaca;
  color: #991b1b;
}

/* АДАПТИВНОСТЬ */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  
  .flagship-banner {
    grid-template-columns: 1fr;
    padding: 32px;
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 1060px) {
  .desktop-nav,
  .header-cta-btn {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .grid-3,
  .grid-2,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .section {
    padding-top: 48px;
    padding-bottom: 48px;
  }

  .form-container {
    padding: 24px;
  }

  .modal-dialog {
    padding: 24px;
  }
}