/* Judge — промо-сайт. Современный стиль, анимации */

:root {
  --bg-dark: #0d1117;
  --bg-card: #161b22;
  --accent: #58a6ff;
  --accent-hover: #79b8ff;
  --accent-soft: rgba(88, 166, 255, 0.15);
  --text: #e6edf3;
  --text-muted: #8b949e;
  --border: #30363d;
  --success: #3fb950;
  --warning: #d29922;
  --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-dark) url('../images/judge-bg.jpg') no-repeat center center fixed;
  background-size: cover;
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Затемнение и градиент поверх фона */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: linear-gradient(180deg, rgba(13, 17, 23, 0.75) 0%, rgba(13, 17, 23, 0.85) 100%),
              radial-gradient(ellipse 80% 50% at 50% -20%, rgba(88, 166, 255, 0.1), transparent),
              radial-gradient(ellipse 60% 40% at 100% 50%, rgba(88, 166, 255, 0.05), transparent);
  pointer-events: none;
  z-index: 0;
}

/* Шапка и логотип */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: transform var(--transition), opacity var(--transition);
}

.site-header.hidden {
  transform: translateY(-100%);
  opacity: 0;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Логотип — стилизованная буква J */
.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  transition: color var(--transition);
}

.logo:hover {
  color: var(--accent);
}

.logo-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent), #1f6feb);
  border-radius: var(--radius);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 800;
  box-shadow: 0 4px 20px rgba(31, 111, 235, 0.4);
  transition: transform var(--transition), box-shadow var(--transition);
}

.logo:hover .logo-icon {
  transform: scale(1.05);
  box-shadow: 0 6px 28px rgba(31, 111, 235, 0.5);
}

/* J как крюк/трасса */
.logo-icon svg {
  width: 28px;
  height: 28px;
}

/* Навигация */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-menu a {
  padding: 0.6rem 1rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--accent);
  background: var(--accent-soft);
}

/* Контент и анимации страниц */
main {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  padding-top: 80px;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem;
  animation: pageIn 0.5s ease-out forwards;
}

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

/* Заголовки */
h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #fff, var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 2rem 0 1rem;
  color: var(--text);
}

.subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

/* Страницы ошибок (Apache ErrorDocument) — в HTML используются пути от корня: /css/… */
.error-hero {
  text-align: center;
  padding: 2rem 0 1rem;
}

.error-hero .error-code {
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 10vw, 4.5rem);
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.05em;
  line-height: 1;
  margin-bottom: 1rem;
}

.error-hero h1 {
  margin-bottom: 0.75rem;
}

.error-hero .subtitle {
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

/* Карточки */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.card:hover {
  border-color: rgba(88, 166, 255, 0.3);
  box-shadow: var(--shadow);
}

/* Кнопки */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #1f6feb);
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(31, 111, 235, 0.4);
}

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

.btn-secondary {
  background: var(--bg-card);
  color: var(--accent);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  box-shadow: none;
}

/* Сетки */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

/* Дисциплины на главной */
.discipline {
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition);
}

.discipline:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.discipline-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  background: var(--accent-soft);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
}

.discipline h3 {
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
}

.discipline p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Блок «О приложении» */
.about-app {
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

.about-app-inner {
  background: linear-gradient(145deg, rgba(22, 27, 34, 0.95) 0%, rgba(13, 17, 23, 0.98) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.about-app-inner::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--accent), #1f6feb);
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.about-app-inner:hover {
  border-color: rgba(88, 166, 255, 0.25);
  box-shadow: 0 20px 56px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(88, 166, 255, 0.08);
}

.about-app-header {
  margin-bottom: 2rem;
  padding-right: 0.5rem;
}

.about-app-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.about-app-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
  color: var(--text);
}

.about-app-lead {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text-muted);
  margin: 0;
  max-width: 640px;
}

.about-app-disciplines {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.about-app-disciplines-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
}

/* Таблицы */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--bg-card);
  color: var(--text-muted);
  font-weight: 600;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: rgba(88, 166, 255, 0.05);
}

/* Формы */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 500;
  color: var(--text-muted);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.65rem 1rem;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Список соревнований */
.competition-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  transition: all var(--transition);
}

.competition-item:hover {
  border-color: var(--accent);
}

.competition-info h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.competition-info .meta {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.competition-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

/* Статус */
.badge {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 6px;
  text-transform: uppercase;
}

.badge-upcoming {
  background: rgba(210, 153, 34, 0.2);
  color: var(--warning);
}

.badge-live {
  background: rgba(63, 185, 80, 0.2);
  color: var(--success);
}

.badge-past {
  background: var(--accent-soft);
  color: var(--accent);
}

/* Hero на главной */
.hero {
  text-align: center;
  padding: 3rem 0 4rem;
}

.hero .logo-icon {
  margin: 0 auto 1.5rem;
  width: 72px;
  height: 72px;
  font-size: 2.5rem;
}

.hero h1 {
  margin-bottom: 0.75rem;
}

.hero .subtitle {
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 2.5rem;
}

/* Ссылка на веб-интерфейс (крупный CTA) */
.cta-block {
  text-align: center;
  padding: 3rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin: 2rem 0;
}

.cta-block .btn {
  font-size: 1.1rem;
  padding: 1rem 2rem;
}

/* Загрузка / скелетон */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--border) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: skeleton 1.2s ease-in-out infinite;
  border-radius: 6px;
  height: 1em;
}

@keyframes skeleton {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.loading-msg {
  color: var(--text-muted);
  text-align: center;
  padding: 2rem;
}

/* Карусель «Возможности» */
.carousel-section {
  padding-left: 60px;
  padding-right: 60px;
}

.carousel-section h2 {
  margin-bottom: 1.25rem;
}

.carousel {
  position: relative;
  max-width: 100%;
  margin: 0 auto;
}

.carousel-gallery {
  position: relative;
}

.carousel-viewport {
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.carousel-track {
  display: flex;
  gap: 1.5rem;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.carousel-item {
  flex: 0 0 100%;
  min-width: 0;
  margin-bottom: 0;
}

@media (min-width: 640px) {
  .carousel-item {
    flex: 0 0 calc(50% - 0.75rem);
  }
}

@media (min-width: 900px) {
  .carousel-item {
    flex: 0 0 calc(33.333% - 1rem);
  }
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: var(--bg-card);
  color: var(--accent);
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: background var(--transition), color var(--transition), transform var(--transition);
  z-index: 2;
}

.carousel-btn:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-50%) scale(1.08);
}

.carousel-btn-prev {
  left: calc(-44px - 16px);
}

.carousel-btn-next {
  right: calc(-44px - 16px);
}

.carousel-btn:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--accent);
}

.carousel-btn-prev::before {
  content: '';
  display: block;
  width: 0;
  height: 0;
  margin: 0 auto;
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  border-right: 10px solid currentColor;
}

.carousel-btn-next::before {
  content: '';
  display: block;
  width: 0;
  height: 0;
  margin: 0 auto;
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  border-left: 10px solid currentColor;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.carousel-dots button {
  width: 8px;
  height: 8px;
  border: none;
  border-radius: 50%;
  background: var(--border);
  cursor: pointer;
  padding: 0;
  transition: background var(--transition), transform var(--transition);
}

.carousel-dots button:hover {
  background: var(--text-muted);
}

.carousel-dots button.active {
  background: var(--accent);
  transform: scale(1.25);
}

/* Футер */
.site-footer {
  margin-top: 4rem;
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--border);
}

/* Адаптив */
@media (max-width: 768px) {
  .site-header {
    padding: 0.75rem 1rem;
  }

  .nav-menu {
    gap: 0;
  }

  .nav-menu a {
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
  }

  .page {
    padding: 1.5rem 1rem;
  }

  h1 {
    font-size: 1.9rem;
  }

  .competition-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .carousel-section {
    padding-left: 52px;
    padding-right: 52px;
  }

  .about-app-inner {
    padding: 1.75rem 1.25rem;
  }

  .about-app-title {
    font-size: 1.45rem;
  }
}