/* ============================================
   Школа 7Я — Design Tokens
   Палитра: Яркое детство
   Шрифты: Lora + Nunito
   ============================================ */

:root {
  /* --- Основные цвета --- */
  --color-primary: #6B5CA5;
  --color-primary-light: #B8A9E0;
  --color-primary-bg: #F7F3FF;
  --color-primary-dark: #4A3D7A;

  --color-accent: #E8734A;
  --color-accent-hover: #D4622D;
  --color-accent-light: #F5B89E;

  --color-sunny: #F9D56E;
  --color-sunny-light: #FDF0C8;
  --color-sunny-dark: #C9A830;

  /* --- Нейтральные --- */
  --color-text: #2E2B3A;
  --color-text-secondary: #5A5868;
  --color-text-muted: #8A8898;
  --color-text-inverse: #FFFFFF;

  --color-bg: #FFFFFF;
  --color-bg-warm: #FDFBF8;
  --color-bg-card: #FFFFFF;

  --color-border: rgba(107, 92, 165, 0.12);
  --color-border-hover: rgba(107, 92, 165, 0.25);
  --color-border-strong: rgba(107, 92, 165, 0.4);

  /* --- Семантические --- */
  --color-success: #4A9E6B;
  --color-error: #D45050;
  --color-info: #5A8EC9;

  /* --- Типографика --- */
  --font-heading: 'Lora', Georgia, 'Times New Roman', serif;
  --font-body: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --text-hero: 3rem;       /* 48px */
  --text-h1: 2.25rem;      /* 36px */
  --text-h2: 1.75rem;      /* 28px */
  --text-h3: 1.375rem;     /* 22px */
  --text-h4: 1.125rem;     /* 18px */
  --text-body-lg: 1.125rem;/* 18px */
  --text-body: 1rem;        /* 16px */
  --text-small: 0.875rem;   /* 14px */
  --text-xs: 0.75rem;       /* 12px */

  --leading-tight: 1.2;
  --leading-snug: 1.3;
  --leading-normal: 1.65;

  --weight-regular: 400;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* --- Пространство --- */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  --space-section: 80px;

  /* --- Скругления --- */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* --- Тени --- */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(107, 92, 165, 0.08);
  --shadow-lg: 0 8px 24px rgba(107, 92, 165, 0.12);
  --shadow-card-hover: 0 4px 12px rgba(107, 92, 165, 0.1);

  /* --- Анимации --- */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
  --transition-slow: 0.3s ease;
  --transition-appear: 0.5s ease;

  /* --- Контейнер --- */
  --container-max: 1200px;
  --container-narrow: 680px;
  --container-padding: 24px;

  /* --- Z-index --- */
  --z-nav: 100;
  --z-modal: 200;
  --z-toast: 300;
}

/* --- Мобильные переопределения --- */
@media (max-width: 768px) {
  :root {
    --text-hero: 2rem;        /* 32px */
    --text-h1: 1.75rem;       /* 28px */
    --text-h2: 1.375rem;      /* 22px */
    --text-h3: 1.125rem;      /* 18px */
    --space-section: 48px;
    --container-padding: 16px;
  }
}

/* --- Базовые стили --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: var(--weight-regular);
  font-size: var(--text-body);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-bg);
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
}

h1 { font-size: var(--text-h1); line-height: var(--leading-tight); }
h2 { font-size: var(--text-h2); line-height: var(--leading-snug); }
h3 { font-size: var(--text-h3); line-height: var(--leading-snug); }
h4 { font-size: var(--text-h4); line-height: var(--leading-snug); }

p {
  max-width: var(--container-narrow);
  margin-bottom: var(--space-md);
}

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

/* --- Утилиты --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--space-section) 0;
}

.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }

/* --- Кнопки --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: var(--weight-bold);
  font-size: var(--text-body);
  padding: 14px 32px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: background var(--transition-normal),
              transform var(--transition-fast),
              box-shadow var(--transition-normal);
  text-decoration: none;
  line-height: 1;
}
.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-text-inverse);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  font-weight: var(--weight-semibold);
  font-size: var(--text-small);
  padding: 12px 28px;
}
.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-inverse {
  background: var(--color-text-inverse);
  color: var(--color-primary);
}
.btn-inverse:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

/* --- Карточки --- */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal),
              box-shadow var(--transition-normal);
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.card-bordered {
  border-left: 4px solid var(--color-primary);
}
.card-bordered.accent {
  border-left-color: var(--color-accent);
}
.card-bordered.sunny {
  border-left-color: var(--color-sunny);
}

/* --- Бэджи --- */
.badge {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: var(--weight-semibold);
  font-size: var(--text-xs);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--color-primary-bg);
  color: var(--color-primary);
}
.badge-accent {
  background: rgba(232, 115, 74, 0.12);
  color: var(--color-accent);
}
.badge-sunny {
  background: var(--color-sunny-light);
  color: var(--color-sunny-dark);
}

/* --- Навигация --- */
.nav {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: var(--z-nav);
  padding: var(--space-md) var(--container-padding);
}

/* --- Scroll-reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-appear),
              transform var(--transition-appear);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Фокус для accessibility --- */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}