/* ==========================================================================
   УмКид — Global Styles & CSS Variables
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;500;600;700;800;900&family=Nunito+Sans:wght@400;500;600;700&display=swap');

/* --- CSS Variables -------------------------------------------------------- */
:root {
  /* Brand Colors */
  --color-primary:     #378ADD;
  --color-primary-dark: #2566B8;
  --color-primary-light: #6AAEE8;
  --color-secondary:   #1D9E75;
  --color-secondary-light: #3DBFA0;
  --color-accent:      #FFC947;
  --color-accent-light: #FFD970;
  --color-purple:      #7F77DD;
  --color-purple-light: #A09AE8;
  --color-coral:       #F06B6B;

  /* Backgrounds */
  --color-bg:          #F8FAFF;
  --color-bg-subtle:   #EEF3FB;
  --color-surface:     #FFFFFF;
  --color-surface-raised: #FDFEFF;

  /* Text */
  --color-text:        #1A1F36;
  --color-text-muted:  #6B7280;
  --color-text-light:  #9CA3AF;

  /* Border */
  --color-border:      rgba(55, 138, 221, 0.12);
  --color-border-subtle: rgba(55, 138, 221, 0.06);

  /* Border radius */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-2xl: 48px;
  --radius-full: 9999px;

  /* Shadows (layered for depth) */
  --shadow-xs:
    0 1px 2px rgba(26, 31, 54, 0.04);
  --shadow-sm:
    0 1px 2px rgba(26, 31, 54, 0.04),
    0 2px 4px rgba(26, 31, 54, 0.04);
  --shadow-md:
    0 2px 4px rgba(26, 31, 54, 0.04),
    0 4px 8px rgba(26, 31, 54, 0.05),
    0 8px 16px rgba(26, 31, 54, 0.04);
  --shadow-lg:
    0 2px 4px rgba(26, 31, 54, 0.04),
    0 8px 16px rgba(26, 31, 54, 0.06),
    0 24px 48px rgba(26, 31, 54, 0.06);
  --shadow-xl:
    0 4px 8px rgba(26, 31, 54, 0.04),
    0 16px 32px rgba(26, 31, 54, 0.08),
    0 32px 64px rgba(26, 31, 54, 0.08);
  --shadow-primary:
    0 4px 12px rgba(55, 138, 221, 0.25),
    0 8px 24px rgba(55, 138, 221, 0.15);
  --shadow-accent:
    0 4px 12px rgba(239, 159, 39, 0.3),
    0 8px 24px rgba(239, 159, 39, 0.15);

  /* Typography */
  --font-display: 'Nunito', sans-serif;
  --font-body: 'Nunito Sans', sans-serif;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-32: 128px;

  /* Transitions */
  --ease-out-soft: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-sine: cubic-bezier(0.45, 0.05, 0.55, 0.95);
  --ease-back: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --container-max: 1280px;
  --container-wide: 1440px;
  --nav-height: 72px;

  /* Цвет фона страницы под капотом (для плавного перехода темы) */
  --bg-glow-1: rgba(55, 138, 221, 0.07);
  --bg-glow-2: rgba(127, 119, 221, 0.05);
}

/* --- Тёмная тема ---------------------------------------------------------- */
[data-theme="dark"] {
  /* Бренд — слегка осветлён для контраста на тёмном (по брендбуку) */
  --color-primary:       #4CAAF0;
  --color-primary-dark:  #378ADD;
  --color-primary-light: #7AC2F5;
  --color-secondary:     #22C48C;
  --color-secondary-light: #3DD7A2;

  /* Фоны */
  --color-bg:            #0D1320;
  --color-bg-subtle:     #161D2E;
  --color-surface:       #161D2E;
  --color-surface-raised: #1E2638;

  /* Текст */
  --color-text:          #E8ECF4;
  --color-text-muted:    #9AA4B8;
  --color-text-light:    #6B7589;

  /* Границы */
  --color-border:        rgba(120, 165, 225, 0.16);
  --color-border-subtle: rgba(120, 165, 225, 0.08);

  /* Тени — глубже и темнее */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.4), 0 4px 8px rgba(0, 0, 0, 0.35), 0 8px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, 0.4), 0 8px 16px rgba(0, 0, 0, 0.4), 0 24px 48px rgba(0, 0, 0, 0.45);
  --shadow-xl: 0 4px 8px rgba(0, 0, 0, 0.4), 0 16px 32px rgba(0, 0, 0, 0.5), 0 32px 64px rgba(0, 0, 0, 0.5);

  /* Свечение фоновых пятен */
  --bg-glow-1: rgba(55, 138, 221, 0.12);
  --bg-glow-2: rgba(127, 119, 221, 0.10);
}

/* --- Reset & Base --------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--bg-glow-1), transparent),
    radial-gradient(ellipse 40% 40% at 95% 5%, var(--bg-glow-2), transparent);
  overflow-x: hidden;
  transition: background-color 0.4s var(--ease-out-soft), color 0.4s var(--ease-out-soft);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  font-family: var(--font-display);
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: var(--font-body);
}

/* --- Typography ----------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 { font-size: clamp(36px, 5vw, 56px); }
h2 { font-size: clamp(28px, 3.5vw, 40px); }
h3 { font-size: clamp(20px, 2.5vw, 26px); }
h4 { font-size: 20px; }
h5 { font-size: 18px; }
h6 { font-size: 16px; }

p {
  line-height: 1.7;
  color: var(--color-text-muted);
}

/* --- Layout Utilities ----------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-24) 0;
}

.section-sm {
  padding: var(--space-16) 0;
}

/* --- Section Headers ------------------------------------------------------ */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-16);
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(55, 138, 221, 0.08);
  border: 1px solid rgba(55, 138, 221, 0.15);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.section-title {
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.section-sub {
  font-size: 18px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --- Buttons -------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
  transition:
    transform 0.2s var(--ease-out-soft),
    box-shadow 0.2s var(--ease-out-soft),
    background 0.2s ease,
    opacity 0.2s ease;
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 6px 20px rgba(55, 138, 221, 0.4), 0 12px 32px rgba(55, 138, 221, 0.2);
}

.btn-secondary {
  background: var(--color-secondary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(29, 158, 117, 0.3);
}
.btn-secondary:hover {
  background: #189066;
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-accent);
}
.btn-accent:hover {
  background: #d4891a;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}
.btn-outline:hover {
  background: rgba(55, 138, 221, 0.06);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border);
}
.btn-ghost:hover {
  background: rgba(26, 31, 54, 0.04);
  border-color: rgba(26, 31, 54, 0.15);
}

.btn-lg {
  padding: 18px 36px;
  font-size: 17px;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}

/* --- Cards ---------------------------------------------------------------- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  transition:
    transform 0.3s var(--ease-out-soft),
    box-shadow 0.3s var(--ease-out-soft);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* --- Badge / Tag ---------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
}

.badge-primary { background: rgba(55, 138, 221, 0.12); color: var(--color-primary); }
.badge-secondary { background: rgba(29, 158, 117, 0.12); color: var(--color-secondary); }
.badge-accent { background: rgba(239, 159, 39, 0.12); color: #c07d00; }
.badge-purple { background: rgba(127, 119, 221, 0.12); color: var(--color-purple); }
.badge-coral { background: rgba(240, 107, 107, 0.12); color: var(--color-coral); }

/* --- Gradient Text -------------------------------------------------------- */
.text-gradient-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-accent {
  background: linear-gradient(135deg, var(--color-accent), var(--color-coral));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-green {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Divider -------------------------------------------------------------- */
.divider {
  width: 100%;
  height: 1px;
  background: var(--color-border);
}

/* --- Highlight Box -------------------------------------------------------- */
.highlight-box {
  display: inline;
  background: linear-gradient(120deg, rgba(239, 159, 39, 0.15) 0%, rgba(239, 159, 39, 0.15) 100%);
  border-radius: 4px;
  padding: 0 4px;
}

/* --- Visually Hidden ------------------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --- Responsive Helpers --------------------------------------------------- */
@media (max-width: 1024px) {
  :root { --container-max: 960px; }
  .section { padding: var(--space-20) 0; }
}

@media (max-width: 768px) {
  .section { padding: var(--space-16) 0; }
  .section-header { margin-bottom: var(--space-12); }
  .btn-lg { padding: 16px 28px; font-size: 16px; }
  h1 { font-size: 34px; }
  h2 { font-size: 28px; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-4); }
  .section { padding: var(--space-12) 0; }
  h1 { font-size: 30px; }
}

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