/* CSS Variables - Тетрадная цветовая схема с эко-минимализмом */
:root {
  /* Основные цвета (Тетрада) */
  --primary-color: #2E7D32; /* Зеленый - основной */
  --primary-dark: #1B5E20;
  --primary-light: #4CAF50;
  --secondary-color: #FF6F00; /* Оранжевый */
  --secondary-dark: #E65100;
  --secondary-light: #FF9800;
  --tertiary-color: #3F51B5; /* Синий */
  --tertiary-dark: #303F9F;
  --tertiary-light: #5C6BC0;
  --quaternary-color: #E91E63; /* Розовый */
  --quaternary-dark: #C2185B;
  --quaternary-light: #F06292;
  
  /* Нейтральные цвета */
  --white: #FFFFFF;
  --light-gray: #F8F9FA;
  --gray: #6C757D;
  --dark-gray: #495057;
  --dark: #212529;
  --black: #000000;
  
  /* Градиенты */
  --primary-gradient: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  --secondary-gradient: linear-gradient(135deg, var(--secondary-color), var(--secondary-light));
  --hero-gradient: linear-gradient(135deg, rgba(46, 125, 50, 0.8), rgba(76, 175, 80, 0.8));
  --overlay-gradient: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5));
  
  /* Шрифты */
  --font-heading: 'Raleway', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  
  /* Размеры */
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;
  --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  --box-shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s ease;
  --transition-fast: all 0.2s ease;
  
  /* Spacing */
  --section-padding: 5rem 0;
  --container-padding: 1.5rem;
}

/* Reset и базовые стили */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  line-height: 1.7;
  color: var(--dark);
  background-color: var(--white);
  overflow-x: hidden;
}

/* Типография */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 1rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h5 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
h6 { font-size: clamp(1rem, 1.5vw, 1.25rem); }

p {
  margin-bottom: 1.25rem;
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
}

.lead {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  font-weight: 400;
  color: var(--gray);
  margin-bottom: 2rem;
}

/* Глобальные стили кнопок */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 500;
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius);
  padding: 0.875rem 2rem;
  font-size: 1rem;
  line-height: 1.5;
  transition: var(--transition);
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--primary-gradient);
  color: var(--white);
  box-shadow: 0 4px 15px rgba(46, 125, 50, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(46, 125, 50, 0.4);
  color: var(--white);
}

.btn-secondary {
  background: var(--secondary-gradient);
  color: var(--white);
  box-shadow: 0 4px 15px rgba(255, 111, 0, 0.3);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 111, 0, 0.4);
  color: var(--white);
}

.btn-outline-primary {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-outline-primary:hover {
  background: var(--primary-color);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-outline-light {
  background: transparent;
  color: var(--white);
  border: 2px solid var(--white);
}

.btn-outline-light:hover {
  background: var(--white);
  color: var(--primary-color);
  transform: translateY(-2px);
}

.btn-outline-success {
  background: transparent;
  color: var(--primary-light);
  border: 2px solid var(--primary-light);
}

.btn-outline-success:hover {
  background: var(--primary-light);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 1.125rem 2.5rem;
  font-size: 1.1rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Навигация */
.navbar {
  backdrop-filter: blur(10px);
  background: rgba(33, 37, 41, 0.95) !important;
  transition: var(--transition);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar-brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--white) !important;
  text-decoration: none;
}

.navbar-nav .nav-link {
  font-family: var(--font-heading);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9) !important;
  margin: 0 0.5rem;
  padding: 0.5rem 1rem !important;
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
  position: relative;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  color: var(--primary-light) !important;
  background: rgba(76, 175, 80, 0.1);
}

.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-light);
  transition: var(--transition);
  transform: translateX(-50%);
}

.navbar-nav .nav-link:hover::after {
  width: 80%;
}

/* Hero секция */
.hero-section {
  position: relative;
  background-size: cover !important;
  background-repeat: no-repeat !important;
  background-position: center !important;
  background-attachment: fixed;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--hero-gradient);
  z-index: 1;
}

.hero-section .container {
  position: relative;
  z-index: 2;
}

.hero-section h1 {
  color: var(--white) !important;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  margin-bottom: 1.5rem;
  animation: fadeInUp 1s ease-out;
}

.hero-section p {
  color: var(--white) !important;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
  margin-bottom: 2.5rem;
  animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-section .btn {
  animation: fadeInUp 1s ease-out 0.4s both;
  margin: 0.5rem;
}

/* Анимации */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

.animate-fade-in {
  animation: fadeInUp 1s ease-out;
}

.animate-slide-left {
  animation: slideInLeft 1s ease-out;
}

.animate-slide-right {
  animation: slideInRight 1s ease-out;
}

/* Секции */
section {
  padding: var(--section-padding);
}

.bg-light {
  background-color: var(--light-gray) !important;
}

/* Карточки */
.card {
  border: none;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  overflow: hidden;
  background: var(--white);
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--box-shadow-hover);
}

.card-image {
  width: 100%;
  height: 250px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.card:hover .card-image img {
  transform: scale(1.1);
}

.card-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  text-align: center;
  padding: 1.5rem;
}

.card-title {
  color: var(--dark);
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.card-text {
  color: var(--gray);
  margin-bottom: 1rem;
  flex: 1;
}

/* Innovation карточки */
.innovation-card .card-image {
  height: 250px;
}

.innovation-card .card-content {
  padding: 2rem 1.5rem;
}

/* Instructor карточки */
.instructor-card .card-image {
  height: 300px;
}

.instructor-card .card-content {
  text-align: center;
}

/* Award карточки */
.award-card {
  text-align: center;
  padding: 2rem 1rem;
}

.award-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.award-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Resource карточки */
.resource-card .card-content {
  text-align: left;
}

.resource-card .btn {
  text-align: left;
  justify-content: flex-start;
  margin-bottom: 0.5rem;
}

/* Аккордеон */
.accordion-item {
  border: none;
  border-radius: var(--border-radius) !important;
  margin-bottom: 1rem;
  overflow: hidden;
}

.accordion-button {
  background: var(--white);
  color: var(--dark);
  border: none;
  padding: 1.5rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
}

.accordion-button:not(.collapsed) {
  background: var(--primary-color);
  color: var(--white);
  box-shadow: none;
}

.accordion-button:focus {
  box-shadow: 0 0 0 0.25rem rgba(46, 125, 50, 0.25);
  border: none;
}

.accordion-body {
  padding: 2rem 1.5rem;
  background: var(--white);
}

.accordion-body img {
  border-radius: var(--border-radius-sm);
  object-fit: cover;
}

/* Галерея */
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.gallery-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow-hover);
}

.gallery-item img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  transition: var(--transition);
}

.gallery-item:hover img {
  transform: scale(1.1);
}

/* Бейджи */
.badge {
  font-family: var(--font-heading);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-lg);
  font-size: 0.85rem;
}

.badge.bg-primary {
  background: var(--primary-gradient) !important;
}

.badge.bg-success {
  background: var(--secondary-gradient) !important;
}

/* Формы */
.form-floating {
  margin-bottom: 1.5rem;
}

.form-control,
.form-select {
  border: 2px solid #e9ecef;
  border-radius: var(--border-radius-sm);
  padding: 1rem 0.75rem;
  font-size: 1rem;
  transition: var(--transition);
  background: var(--white);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.25rem rgba(46, 125, 50, 0.25);
}

.form-floating label {
  padding: 1rem 0.75rem;
  color: var(--gray);
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label,
.form-floating > .form-select ~ label {
  color: var(--primary-color);
}

/* Контакт форма */
.contact-form {
  background: var(--white);
}

.contact-form .card {
  border: none;
  box-shadow: var(--box-shadow);
}

.contact-form .card-body {
  padding: 3rem;
}

/* Футер */
footer {
  background: var(--dark) !important;
  color: var(--white);
  margin-top: auto;
}

footer h5,
footer h6 {
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 600;
}

footer .text-muted {
  color: rgba(255, 255, 255, 0.7) !important;
}

footer a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: var(--transition);
}

footer a:hover {
  color: var(--primary-light);
  text-decoration: none;
}

footer .text-light {
  color: var(--white) !important;
}

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

.border-secondary {
  border-color: rgba(255, 255, 255, 0.2) !important;
}

/* Социальные ссылки */
footer .d-flex.gap-3 a {
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius-sm);
  background: rgba(255, 255, 255, 0.1);
  transition: var(--transition);
  font-weight: 500;
}

footer .d-flex.gap-3 a:hover {
  background: var(--primary-color);
  color: var(--white) !important;
  transform: translateY(-2px);
}

/* Дополнительные страницы */
.page-content {
  padding-top: 100px;
  min-height: calc(100vh - 100px);
}

/* Success страница */
.success-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--light-gray);
}

.success-content {
  text-align: center;
  padding: 3rem;
  background: var(--white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--box-shadow);
  max-width: 600px;
  margin: 2rem;
}

.success-content h1 {
  color: var(--primary-color);
  margin-bottom: 1.5rem;
}

.success-content p {
  color: var(--gray);
  margin-bottom: 2rem;
}

/* About страница */
.about-hero {
  background: var(--primary-gradient);
  color: var(--white);
  text-align: center;
  padding: 6rem 0 4rem;
}

.about-hero h1 {
  color: var(--white);
  margin-bottom: 1.5rem;
}

.about-hero p {
  color: var(--white);
  font-size: 1.2rem;
  opacity: 0.9;
}

/* Утилиты */
.text-primary {
  color: var(--primary-color) !important;
}

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

.bg-primary {
  background: var(--primary-gradient) !important;
}

.bg-secondary {
  background: var(--secondary-gradient) !important;
}

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

.shadow-sm {
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08) !important;
}

.shadow {
  box-shadow: var(--box-shadow) !important;
}

.shadow-lg {
  box-shadow: var(--box-shadow-hover) !important;
}

/* Читать далее ссылки */
.read-more {
  color: var(--primary-color);
  font-weight: 600;
  text-decoration: none;
  position: relative;
  transition: var(--transition);
}

.read-more:hover {
  color: var(--primary-dark);
  text-decoration: none;
}

.read-more::after {
  content: ' →';
  transition: var(--transition);
}

.read-more:hover::after {
  transform: translateX(3px);
}

/* Адаптивность */
@media (max-width: 1199.98px) {
  .container {
    max-width: 100%;
    padding: 0 var(--container-padding);
  }
}

@media (max-width: 991.98px) {
  :root {
    --section-padding: 3rem 0;
  }
  
  .hero-section {
    background-attachment: scroll;
  }
  
  .card-image {
    height: 200px;
  }
  
  .instructor-card .card-image {
    height: 250px;
  }
  
  .gallery-item img {
    height: 250px;
  }
}

@media (max-width: 767.98px) {
  :root {
    --section-padding: 2rem 0;
    --container-padding: 1rem;
  }
  
  .btn {
    width: 100%;
    margin: 0.25rem 0;
  }
  
  .hero-section .d-flex {
    flex-direction: column;
  }
  
  .hero-section .btn {
    width: auto;
    min-width: 200px;
  }
  
  .card-image {
    height: 180px;
  }
  
  .instructor-card .card-image {
    height: 200px;
  }
  
  .gallery-item img {
    height: 200px;
  }
  
  .contact-form .card-body {
    padding: 2rem 1.5rem;
  }
  
  .success-content {
    padding: 2rem;
    margin: 1rem;
  }
  
  .navbar-brand {
    font-size: 1.25rem;
  }
  
  footer .container > .row {
    text-align: center;
  }
  
  footer .d-flex.gap-3 {
    justify-content: center;
    flex-wrap: wrap;
  }
}

@media (max-width: 575.98px) {
  .hero-section {
    padding: 2rem 0;
    min-height: 70vh;
  }
  
  .about-hero {
    padding: 4rem 0 2rem;
  }
  
  .accordion-button,
  .accordion-body {
    padding: 1rem;
  }
  
  .award-card {
    padding: 1.5rem 1rem;
  }
  
  .page-content {
    padding-top: 80px;
  }
}

/* Микроанимации при скролле */
@keyframes slideInFromBottom {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInFromLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInFromRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transition: var(--transition);
}

.animate-on-scroll.animated {
  opacity: 1;
}

/* Гласморфизм эффекты */
.glass-effect {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.glass-dark {
  background: rgba(33, 37, 41, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Hover эффекты для интерактивных элементов */
.interactive:hover {
  transform: translateY(-3px);
  transition: var(--transition);
}

.glow:hover {
  box-shadow: 0 0 20px rgba(46, 125, 50, 0.5);
}

/* Кастомные скроллбары */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--light-gray);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* Фокус состояния для доступности */
*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.btn:focus,
.form-control:focus,
.form-select:focus {
  outline: none;
}

/* Дополнительные утилитарные классы */
.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.bg-gradient-primary {
  background: var(--primary-gradient) !important;
}

.bg-gradient-secondary {
  background: var(--secondary-gradient) !important;
}

.rounded-custom {
  border-radius: var(--border-radius) !important;
}

.rounded-custom-lg {
  border-radius: var(--border-radius-lg) !important;
}

.transition-all {
  transition: var(--transition);
}

.hover-lift:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow-hover);
}

.hover-scale:hover {
  transform: scale(1.05);
}