/* Сайт учителя химии и биологии — Современный дизайн */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
  /* Современная палитра с градиентами */
  --color-primary: #667eea;
  --color-primary-light: #764ba2;
  --color-primary-dark: #4c51bf;
  --color-accent: #f093fb;
  --color-accent-hover: #4facfe;
  --color-accent-light: #00f2fe;
  --color-bg: #0f0f23;
  --color-bg-light: #1a1a2e;
  --color-bg-card: #16213e;
  --color-text: #e2e8f0;
  --color-text-muted: #a0aec0;
  --color-border: #2d3748;
  
  /* Градиенты */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-blue: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-purple: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
  
  /* Тени и эффекты */
  --shadow-sm: 0 2px 8px rgba(102, 126, 234, 0.1);
  --shadow-md: 0 4px 20px rgba(102, 126, 234, 0.15);
  --shadow-lg: 0 10px 40px rgba(102, 126, 234, 0.2);
  --shadow-hover: 0 8px 30px rgba(240, 147, 251, 0.3);
  --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.5);
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  position: relative;
  overflow-x: hidden;
}

/* ========== Particles Background ========== */
#particles-js {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 0;
  background: radial-gradient(ellipse at bottom, #1b2735 0%, #090a0f 100%);
}

/* ========== Анимированные декоративные элементы по бокам ========== */
.side-decorations {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: visible;
  display: none; /* Отключаем старые декорации, используем particles.js */
}

/* Левая сторона - анимированные пузырьки */
.bubble-container-left {
  position: absolute;
  left: 2%;
  top: 0;
  width: 100px;
  height: 100%;
}

.bubble {
  position: absolute;
  bottom: -100px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(74, 156, 109, 0.35), rgba(26, 71, 42, 0.2));
  border: 2px solid rgba(74, 156, 109, 0.4);
  box-shadow: 
    inset 0 0 30px rgba(255, 255, 255, 0.4), 
    0 8px 25px rgba(26, 71, 42, 0.25),
    0 0 40px rgba(74, 156, 109, 0.15);
  animation: float-up infinite ease-in-out;
}

.bubble:nth-child(1) {
  width: 50px;
  height: 50px;
  left: 10px;
  animation-delay: 0s;
  animation-duration: 8s;
}

.bubble:nth-child(2) {
  width: 35px;
  height: 35px;
  left: 45px;
  animation-delay: 1s;
  animation-duration: 10s;
}

.bubble:nth-child(3) {
  width: 60px;
  height: 60px;
  left: 20px;
  animation-delay: 3s;
  animation-duration: 12s;
}

.bubble:nth-child(4) {
  width: 40px;
  height: 40px;
  left: 55px;
  animation-delay: 5s;
  animation-duration: 9s;
}

.bubble:nth-child(5) {
  width: 45px;
  height: 45px;
  left: 5px;
  animation-delay: 2s;
  animation-duration: 11s;
}

.bubble:nth-child(6) {
  width: 30px;
  height: 30px;
  left: 35px;
  animation-delay: 4s;
  animation-duration: 7s;
}

.bubble:nth-child(7) {
  width: 55px;
  height: 55px;
  left: 15px;
  animation-delay: 6s;
  animation-duration: 13s;
}

.bubble:nth-child(8) {
  width: 38px;
  height: 38px;
  left: 50px;
  animation-delay: 7s;
  animation-duration: 10s;
}

@keyframes float-up {
  0% {
    transform: translateY(0) translateX(0) scale(0.8);
    opacity: 0;
  }
  10% {
    opacity: 0.8;
  }
  50% {
    transform: translateY(-50vh) translateX(15px) scale(1);
    opacity: 0.9;
  }
  90% {
    opacity: 0.7;
  }
  100% {
    transform: translateY(-100vh) translateX(-15px) scale(1.1);
    opacity: 0;
  }
}

/* Правая сторона - вращающаяся молекула ДНК */
.dna-container-right {
  position: absolute;
  right: 2%;
  top: 50%;
  transform: translateY(-50%);
  width: 120px;
  height: 400px;
  perspective: 800px;
  perspective-origin: center center;
}

.dna-helix {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  animation: rotate-dna 15s linear infinite;
}

.dna-pair {
  position: absolute;
  left: 50%;
  width: 70px;
  height: 4px;
  transform-style: preserve-3d;
  margin-left: -35px;
}

.dna-base {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  box-shadow: 
    0 0 12px rgba(74, 156, 109, 0.7),
    inset 0 0 6px rgba(255, 255, 255, 0.4);
  top: -5px;
}

.dna-base.left {
  left: 0;
  background: radial-gradient(circle at 30% 30%, rgba(74, 156, 109, 0.95), rgba(45, 90, 61, 0.8));
  border: 2px solid rgba(74, 156, 109, 0.9);
}

.dna-base.right {
  right: 0;
  background: radial-gradient(circle at 30% 30%, rgba(45, 90, 61, 0.95), rgba(26, 71, 42, 0.8));
  border: 2px solid rgba(45, 90, 61, 0.9);
}

.dna-connector {
  position: absolute;
  left: 14px;
  right: 14px;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, 
    rgba(74, 156, 109, 0.6), 
    rgba(45, 90, 61, 0.7), 
    rgba(26, 71, 42, 0.6)
  );
  border-radius: 1px;
  box-shadow: 0 0 6px rgba(74, 156, 109, 0.5);
}

/* Создаем пары оснований на разных высотах и углах для спирали */
.dna-pair:nth-child(1) { top: 0%; transform: rotateY(0deg); }
.dna-pair:nth-child(2) { top: 5%; transform: rotateY(36deg); }
.dna-pair:nth-child(3) { top: 10%; transform: rotateY(72deg); }
.dna-pair:nth-child(4) { top: 15%; transform: rotateY(108deg); }
.dna-pair:nth-child(5) { top: 20%; transform: rotateY(144deg); }
.dna-pair:nth-child(6) { top: 25%; transform: rotateY(180deg); }
.dna-pair:nth-child(7) { top: 30%; transform: rotateY(216deg); }
.dna-pair:nth-child(8) { top: 35%; transform: rotateY(252deg); }
.dna-pair:nth-child(9) { top: 40%; transform: rotateY(288deg); }
.dna-pair:nth-child(10) { top: 45%; transform: rotateY(324deg); }
.dna-pair:nth-child(11) { top: 50%; transform: rotateY(360deg); }
.dna-pair:nth-child(12) { top: 55%; transform: rotateY(396deg); }
.dna-pair:nth-child(13) { top: 60%; transform: rotateY(432deg); }
.dna-pair:nth-child(14) { top: 65%; transform: rotateY(468deg); }
.dna-pair:nth-child(15) { top: 70%; transform: rotateY(504deg); }
.dna-pair:nth-child(16) { top: 75%; transform: rotateY(540deg); }
.dna-pair:nth-child(17) { top: 80%; transform: rotateY(576deg); }
.dna-pair:nth-child(18) { top: 85%; transform: rotateY(612deg); }
.dna-pair:nth-child(19) { top: 90%; transform: rotateY(648deg); }
.dna-pair:nth-child(20) { top: 95%; transform: rotateY(684deg); }

@keyframes rotate-dna {
  0% {
    transform: rotateY(0deg) rotateX(10deg);
  }
  100% {
    transform: rotateY(360deg) rotateX(10deg);
  }
}

/* Анимированные частицы по центру */
.particles-container {
  position: absolute;
  left: 10%;
  right: 10%;
  top: 0;
  height: 100%;
}

.particle {
  position: absolute;
  bottom: 0;
  width: 8px;
  height: 8px;
  background: radial-gradient(circle, rgba(74, 156, 109, 0.7), rgba(74, 156, 109, 0.3));
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(74, 156, 109, 0.5);
  animation: particle-float 25s infinite ease-in-out;
}

.particle:nth-child(1) { left: 15%; animation-delay: 0s; }
.particle:nth-child(2) { left: 35%; animation-delay: 5s; }
.particle:nth-child(3) { left: 55%; animation-delay: 10s; }
.particle:nth-child(4) { left: 75%; animation-delay: 15s; }
.particle:nth-child(5) { left: 25%; animation-delay: 20s; }
.particle:nth-child(6) { left: 85%; animation-delay: 3s; }

@keyframes particle-float {
  0% {
    transform: translateY(100vh);
    opacity: 0;
  }
  5%, 95% {
    opacity: 0.8;
  }
  50% {
    transform: translateY(0);
    opacity: 0.6;
  }
  100% {
    transform: translateY(-100px);
    opacity: 0;
  }
}

/* Волновой эффект на фоне */
.wave-decoration {
  position: absolute;
  left: 0;
  right: 0;
  height: 200px;
  opacity: 0.08;
}

.wave-decoration.top {
  top: 20%;
}

.wave-decoration.bottom {
  bottom: 20%;
  transform: rotate(180deg);
}

.wave-decoration svg {
  width: 100%;
  height: 100%;
}

/* Скрыть на маленьких экранах */
@media (max-width: 1200px) {
  .side-decorations {
    display: none;
  }
}

/* ========== Анимации при скролле ========== */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in {
  opacity: 0;
  transition: opacity 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
}

.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* Отключение анимаций для пользователей с prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  .fade-in-up,
  .fade-in,
  .scale-in {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ========== Шапка ========== */
.header {
  background: rgba(15, 15, 35, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(102, 126, 234, 0.1);
  color: white;
  padding: 1rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}

.logo {
  color: white;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
}

.logo:hover {
  color: rgba(255, 255, 255, 0.95);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-list a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition);
}

.nav-list a:hover {
  color: white;
}

/* ========== Hero ========== */
.hero {
  position: relative;
  overflow: hidden;
  padding: 6rem 1.5rem 8rem;
  background: 
    linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 50%, var(--color-accent) 100%);
  color: white;
  text-align: center;
  z-index: 2;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 2;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.95;
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
  line-height: 1.7;
}

/* Плавающие элементы */
.hero-decor {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.decor-atom,
.decor-dna,
.decor-flask,
.decor-leaf,
.decor-molecule {
  position: absolute;
  opacity: 0.18;
  animation: float-science 14s infinite ease-in-out;
  will-change: transform;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.decor-atom     { top: 12%; left: 8%; width: 90px; height: 90px; animation-delay: 0s;    }
.decor-dna      { bottom: 18%; right: 10%; font-size: 5.5rem; animation-delay: 2.5s;     }
.decor-flask    { top: 48%; left: 14%; font-size: 4.8rem; animation-delay: 5s;          }
.decor-leaf     { bottom: 22%; left: 18%; font-size: 5rem; animation-delay: 7.5s;       }
.decor-molecule { top: 35%; right: 15%; font-size: 4.2rem; animation-delay: 10s;        }

@keyframes float-science {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  25%      { transform: translate(-8px, -12px) rotate(2deg); }
  50%      { transform: translate(-12px, -18px) rotate(4deg); }
  75%      { transform: translate(-8px, -12px) rotate(2deg); }
}

/* ========== Заголовок внутренних страниц ========== */
.page-hero {
  padding: 2.5rem 1.5rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
}

.page-hero h1 {
  font-size: 1.75rem;
  font-weight: 700;
  max-width: 1100px;
  margin: 0 auto;
  letter-spacing: -0.02em;
}

.breadcrumb {
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  opacity: 0.9;
}

.breadcrumb a {
  color: white;
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* ========== Компактная секция достижений ========== */
.achievements-compact {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  padding: 3rem 1.5rem;
  margin-top: 2rem;
  position: relative;
  z-index: 2;
}

.achievements-compact-container {
  max-width: 1100px;
  margin: 0 auto;
}

.achievements-compact-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: white;
  text-align: center;
  margin-bottom: 2rem;
}

.achievements-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.achievement-stat {
  text-align: center;
  color: white;
}

.achievement-stat-number {
  display: block;
  font-size: 3rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, white, rgba(255, 255, 255, 0.8));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.achievement-stat-label {
  display: block;
  font-size: 0.95rem;
  opacity: 0.9;
}

/* ========== Секция объявлений ========== */
.announcements-section {
  background: transparent;
  padding: 3rem 1.5rem;
  position: relative;
  z-index: 2;
}

.announcements-container {
  max-width: 1100px;
  margin: 0 auto;
}

.announcements-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 2rem;
}

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

.announcement-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 2px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.announcement-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--color-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

.announcement-card:hover::before {
  transform: scaleY(1);
}

.announcement-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.announcement-date {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 0.5rem;
  padding: 0.25rem 0.75rem;
  background: rgba(74, 156, 109, 0.1);
  border-radius: 20px;
}

.announcement-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0.5rem 0;
}

.announcement-text {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}

/* ========== Секции - улучшенные отступы ========== */
.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
  position: relative;
  z-index: 2;
}

.section + .section {
  padding-top: 2rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

/* ========== Об учителе ========== */
.about-content {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.about-photo {
  flex-shrink: 0;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 3rem;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.about-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-text {
  flex: 1;
  min-width: 250px;
}

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  line-height: 1.7;
}

/* Интересные факты */
.fun-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.fun-fact {
  background: linear-gradient(135deg, rgba(74, 156, 109, 0.05), rgba(74, 156, 109, 0.02));
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  align-items: start;
  transition: all var(--transition);
}

.fun-fact:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-sm);
  background: linear-gradient(135deg, rgba(74, 156, 109, 0.08), rgba(74, 156, 109, 0.04));
}

.fun-fact-icon {
  font-size: 2rem;
  flex-shrink: 0;
  line-height: 1;
}

.fun-fact-text {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}

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

.subject-card {
  position: relative;
  overflow: hidden;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 2px solid var(--color-border);
  text-decoration: none;
  color: inherit;
  display: block;
  transition: all var(--transition-slow);
}

.subject-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 70%, rgba(74, 156, 109, 0.08) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.subject-card::after {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transform: rotate(45deg);
  transition: all 0.6s ease;
}

.subject-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-accent);
}

.subject-card:hover::before {
  opacity: 1;
}

.subject-card:hover::after {
  top: 100%;
  right: 100%;
}

.subject-card:hover .subject-card-arrow {
  gap: 0.8rem;
  color: var(--color-accent);
}

/* Лёгкое улучшение контент-карточек */
.content-card {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
}

.content-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.content-card:hover::before {
  transform: scaleX(1);
}

.content-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

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

.subject-card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 1.25rem;
}

.subject-card.chemistry .subject-card-icon {
  background: rgba(74, 156, 109, 0.15);
  color: var(--color-accent);
}

.subject-card.biology .subject-card-icon {
  background: rgba(26, 71, 42, 0.15);
  color: var(--color-primary);
}

.subject-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

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

.subject-card-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: 1rem;
  transition: gap var(--transition);
}

.subject-card:hover .subject-card-arrow {
  gap: 0.5rem;
}

/* ========== Быстрые ссылки ========== */
.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

.quick-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  background: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.quick-link::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(74, 156, 109, 0.1), transparent);
  transition: left 0.5s ease;
}

.quick-link:hover::before {
  left: 100%;
}

.quick-link:hover {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ========== Галерея / Файлы (заглушка для будущего) ========== */
.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.content-card {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.content-card:hover {
  box-shadow: var(--shadow-md);
}

.content-card-image {
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #e8ebe9 0%, #f0f2f1 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 2rem;
}

.content-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content-card-body {
  padding: 1rem;
}

.content-card-body h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.content-card-body p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ========== Футер ========== */
.footer {
  background: var(--color-primary);
  color: white;
  text-align: center;
  padding: 2rem 1.5rem;
  margin-top: 0;
  position: relative;
  z-index: 2;
}

.footer p {
  opacity: 0.9;
  font-size: 0.95rem;
}

/* ========== Календарь событий ========== */
.calendar-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.calendar-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
}

.calendar-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.calendar-nav button {
  background: var(--color-bg-card);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--color-primary);
  transition: all var(--transition);
  font-size: 0.95rem;
}

.calendar-nav button:hover {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.calendar-current-month {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  min-width: 150px;
  text-align: center;
}

.calendar-grid {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.calendar-weekday {
  text-align: center;
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding: 0.5rem;
}

.calendar-days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.5rem;
}

.calendar-day {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  padding: 0.5rem;
  min-height: 70px;
}

.calendar-day:hover {
  background: var(--color-accent-light);
  color: white;
  transform: scale(1.05);
  box-shadow: var(--shadow-sm);
}

.calendar-day.other-month {
  opacity: 0.3;
  pointer-events: none;
}

.calendar-day.today {
  background: var(--color-accent);
  color: white;
  font-weight: 700;
  border-color: var(--color-accent);
}

.calendar-day.has-event {
  border: 2px solid var(--color-accent);
  font-weight: 600;
}

.calendar-day-number {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.calendar-day-events {
  display: flex;
  gap: 2px;
  flex-wrap: wrap;
  justify-content: center;
}

.calendar-event-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  display: inline-block;
}

.calendar-event-dot.test {
  background: var(--color-event-test);
}

.calendar-event-dot.olympiad {
  background: var(--color-event-olympiad);
}

.calendar-event-dot.excursion {
  background: var(--color-event-excursion);
}

.calendar-event-dot.deadline {
  background: var(--color-event-deadline);
}

/* Легенда календаря */
.calendar-legend {
  display: flex;
  gap: 1.5rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.calendar-legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.calendar-legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

/* Список событий */
.events-list {
  margin-top: 2rem;
}

.events-list-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.event-card {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  border-left: 4px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.event-card:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-md);
}

.event-card.test {
  border-left-color: var(--color-event-test);
}

.event-card.olympiad {
  border-left-color: var(--color-event-olympiad);
}

.event-card.excursion {
  border-left-color: var(--color-event-excursion);
}

.event-card.deadline {
  border-left-color: var(--color-event-deadline);
}

.event-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 0.5rem;
  gap: 1rem;
}

.event-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}

.event-date {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.event-description {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.event-type-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-top: 0.5rem;
}

.event-type-badge.test {
  background: rgba(231, 76, 60, 0.1);
  color: var(--color-event-test);
}

.event-type-badge.olympiad {
  background: rgba(243, 156, 18, 0.1);
  color: var(--color-event-olympiad);
}

.event-type-badge.excursion {
  background: rgba(52, 152, 219, 0.1);
  color: var(--color-event-excursion);
}

.event-type-badge.deadline {
  background: rgba(155, 89, 182, 0.1);
  color: var(--color-event-deadline);
}

@media (max-width: 768px) {
  .calendar-day {
    min-height: 60px;
    padding: 0.25rem;
  }
  
  .calendar-day-number {
    font-size: 0.9rem;
  }
  
  .calendar-weekday {
    font-size: 0.8rem;
  }
  
  .event-header {
    flex-direction: column;
    align-items: start;
  }
}

.statistics-container {
  max-width: 1100px;
  margin: 0 auto;
}

.statistics-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.statistics-subtitle {
  text-align: center;
  opacity: 0.9;
  margin-bottom: 3rem;
  font-size: 1rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.stat-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: transform 0.3s ease, background 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.15);
}

.stat-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  display: block;
  margin-bottom: 0.5rem;
  line-height: 1;
}

.stat-label {
  font-size: 1rem;
  opacity: 0.9;
  display: block;
}

.achievements-section {
  margin-top: 3rem;
}

.achievements-title {
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 2rem;
}

.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.achievement-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: transform 0.3s ease;
}

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

.achievement-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.achievement-icon {
  font-size: 2rem;
}

.achievement-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
}

.achievement-level {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.achievement-students {
  font-size: 0.9rem;
  opacity: 0.9;
  line-height: 1.6;
}

/* ========== Cusdis (отзывы) ========== */
.section--reviews {
  max-width: 900px;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  min-height: 60vh;
}

/* Вступительный блок */
.reviews-intro {
  background: linear-gradient(135deg, rgba(74, 156, 109, 0.08), rgba(74, 156, 109, 0.03));
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  text-align: center;
  margin-bottom: 3rem;
  border: 2px solid rgba(74, 156, 109, 0.15);
}

.reviews-intro-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.reviews-intro-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
}

.reviews-intro-text {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 1rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.reviews-intro-text:last-child {
  margin-bottom: 0;
}

/* Информационные карточки */
.reviews-info-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.reviews-info-card {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  text-align: center;
}

.reviews-info-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.reviews-info-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.reviews-info-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.reviews-info-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}

/* Заголовок секции отзывов */
.reviews-section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 2rem;
  text-align: center;
  position: relative;
  padding-bottom: 1rem;
}

.reviews-section-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  border-radius: 2px;
}

.cusdis-wrapper {
  margin-top: 2rem;
  width: 100%;
  margin-bottom: 3rem;
}

#cusdis_thread {
  width: 100%;
}

#cusdis_thread iframe {
  width: 100% !important;
  max-width: 100% !important;
  border: none !important;
  overflow: hidden !important;
  display: block;
}

/* Адаптивность */
@media (max-width: 768px) {
  .reviews-intro {
    padding: 2rem 1.5rem;
  }
  
  .reviews-intro-title {
    font-size: 1.5rem;
  }
  
  .reviews-intro-text {
    font-size: 1rem;
  }
  
  .reviews-info-cards {
    grid-template-columns: 1fr;
  }
}

/* ========== Бургер-меню ========== */
.burger-menu {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  z-index: 101;
}

.burger-menu span {
  display: block;
  width: 25px;
  height: 3px;
  background: white;
  border-radius: 3px;
  transition: all 0.3s ease;
}

.burger-menu.active span:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

.burger-menu.active span:nth-child(2) {
  opacity: 0;
}

.burger-menu.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* Блокировка скролла при открытом меню */
body.menu-open {
  overflow: hidden;
}

/* ========== Мобильное меню ========== */
@media (max-width: 768px) {
  .burger-menu {
    display: flex;
  }
  
  .nav-list {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-primary);
    flex-direction: column;
    gap: 0;
    padding: 80px 2rem 2rem;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2);
    transition: right 0.3s ease;
    z-index: 100;
  }
  
  .nav-list.active {
    right: 0;
  }
  
  .nav-list li {
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .nav-list a {
    display: block;
    padding: 1rem 0;
    font-size: 1rem;
  }
  
  .hero h1 {
    font-size: 1.75rem;
  }
  
  .about-content {
    flex-direction: column;
    align-items: center;
  }
  
  .subjects-grid {
    grid-template-columns: 1fr;
  }
}

/* ========== Дополнительные мобильные оптимизации ========== */
@media (max-width: 480px) {
  .hero {
    padding: 6rem 1rem 4rem;
    min-height: 70vh;
  }
  
  .hero h1 {
    font-size: 1.5rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .section {
    padding: 2rem 1rem;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .quick-links {
    flex-direction: column;
    width: 100%;
  }
  
  .quick-link {
    width: 100%;
    justify-content: center;
  }
  
  .content-grid,
  .announcements-grid {
    grid-template-columns: 1fr;
  }
  
  .footer {
    padding: 1.5rem 1rem;
  }
}

/* Оптимизация производительности */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Оптимизация для touch устройств */
@media (hover: none) and (pointer: coarse) {
  .subject-card:hover,
  .content-card:hover,
  .announcement-card:hover {
    transform: none;
  }
  
  .subject-card:active,
  .content-card:active,
  .announcement-card:active {
    transform: scale(0.98);
  }
}

/* Улучшение читаемости на маленьких экранах */
@media (max-width: 768px) {
  body {
    font-size: 15px;
  }
  
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
  h4 { font-size: 1.1rem; }
  
  /* Увеличиваем кликабельные области */
  button,
  a,
  .quick-link,
  .subject-card,
  .content-card {
    min-height: 44px;
    min-width: 44px;
  }
}