/* ============================================
   ЭКСПРЕСС ТРАНС — Design Tokens
   Визуальная система лендинга ex-trans.ru
   ============================================ */

:root {
  /* --- Primary (Deep Navy) --- */
  --color-primary-900: #0F1B2D;
  --color-primary-800: #1A2B45;
  --color-primary-700: #243B5E;
  --color-primary-600: #2E4A75;
  --color-primary-500: #3A5F99;
  --color-primary-100: #E8EDF5;
  --color-primary-50:  #F4F6FB;

  /* --- Accent (Amber) --- */
  --color-accent-600: #D97706;
  --color-accent-500: #F59E0B;
  --color-accent-400: #FBBF24;
  --color-accent-100: #FEF3C7;
  --color-accent-50:  #FFFBEB;

  /* --- Neutral (Slate) --- */
  --color-neutral-900: #0F172A;
  --color-neutral-700: #334155;
  --color-neutral-500: #64748B;
  --color-neutral-400: #94A3B8;
  --color-neutral-300: #CBD5E1;
  --color-neutral-200: #E2E8F0;
  --color-neutral-100: #F1F5F9;
  --color-neutral-50:  #F8FAFC;
  --color-white:       #FFFFFF;

  /* --- Semantic --- */
  --color-success-500: #16A34A;
  --color-success-50:  #F0FDF4;
  --color-error-500:   #DC2626;
  --color-error-50:    #FEF2F2;
  --color-info-500:    #2563EB;

  /* --- Typography --- */
  --font-family:       'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --font-size-hero:    1.75rem;   /* 28px mobile */
  --font-size-h2:      1.5rem;    /* 24px mobile */
  --font-size-h3:      1.25rem;   /* 20px mobile */
  --font-size-h4:      1.125rem;  /* 18px mobile */
  --font-size-body-lg: 1.0625rem; /* 17px mobile */
  --font-size-body:    0.9375rem; /* 15px mobile */
  --font-size-body-sm: 0.8125rem; /* 13px mobile */
  --font-size-caption: 0.75rem;   /* 12px */
  --font-size-button:  1rem;      /* 16px */
  --font-size-badge:   0.8125rem; /* 13px */

  --font-weight-regular:  400;
  --font-weight-medium:   500;
  --font-weight-semibold: 600;
  --font-weight-bold:     700;
  --font-weight-extrabold: 800;

  --line-height-tight:   1.15;
  --line-height-snug:    1.25;
  --line-height-normal:  1.5;
  --line-height-relaxed: 1.6;

  /* --- Spacing (4px grid) --- */
  --space-1:  0.25rem;  /* 4px */
  --space-2:  0.5rem;   /* 8px */
  --space-3:  0.75rem;  /* 12px */
  --space-4:  1rem;     /* 16px */
  --space-5:  1.25rem;  /* 20px */
  --space-6:  1.5rem;   /* 24px */
  --space-8:  2rem;     /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */

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

  /* --- Shadows --- */
  --shadow-xs:  0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm:  0 1px 3px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.02);
  --shadow-md:  0 4px 12px rgba(15, 23, 42, 0.06), 0 2px 4px rgba(15, 23, 42, 0.03);
  --shadow-lg:  0 8px 25px rgba(15, 23, 42, 0.08), 0 4px 10px rgba(15, 23, 42, 0.04);
  --shadow-xl:  0 16px 40px rgba(15, 23, 42, 0.1), 0 8px 16px rgba(15, 23, 42, 0.05);
  --shadow-cta: 0 1px 3px rgba(217, 119, 6, 0.3), 0 1px 2px rgba(217, 119, 6, 0.2);
  --shadow-cta-hover: 0 4px 12px rgba(217, 119, 6, 0.35), 0 2px 6px rgba(217, 119, 6, 0.15);
  --shadow-sticky-bar: 0 -4px 12px rgba(15, 23, 42, 0.08);

  /* --- Transitions --- */
  --transition-fast:   0.15s ease;
  --transition-normal: 0.2s ease;
  --transition-slow:   0.3s ease;

  /* --- Container --- */
  --container-padding-mobile:  16px;
  --container-padding-tablet:  32px;
  --container-max-width:       1200px;

  /* --- Z-index --- */
  --z-sticky-cta: 50;
  --z-header:     100;
  --z-modal:      200;
  --z-toast:      300;
}

/* --- Desktop overrides (1280+) --- */
@media (min-width: 1280px) {
  :root {
    --font-size-hero:    3rem;     /* 48px */
    --font-size-h2:      2.25rem;  /* 36px */
    --font-size-h3:      1.75rem;  /* 28px */
    --font-size-h4:      1.375rem; /* 22px */
    --font-size-body-lg: 1.125rem; /* 18px */
    --font-size-body:    1rem;     /* 16px */
    --font-size-body-sm: 0.875rem; /* 14px */
  }
}

/* --- Tablet overrides (768+) --- */
@media (min-width: 768px) {
  :root {
    --font-size-hero:    2.25rem;  /* 36px */
    --font-size-h2:      1.875rem; /* 30px */
    --font-size-h3:      1.5rem;   /* 24px */
  }
}


/* ============================================
   BASE STYLES
   ============================================ */

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

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-relaxed);
  color: var(--color-neutral-900);
  background-color: var(--color-neutral-50);
}


/* ============================================
   TYPOGRAPHY
   ============================================ */

.text-hero {
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-extrabold);
  line-height: var(--line-height-tight);
  letter-spacing: -0.02em;
  color: var(--color-primary-900);
}

.text-h2 {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--color-primary-800);
}

.text-h3 {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-snug);
  letter-spacing: -0.01em;
  color: var(--color-primary-800);
}

.text-h4 {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  line-height: 1.3;
  color: var(--color-primary-800);
}

.text-body-lg {
  font-size: var(--font-size-body-lg);
  line-height: var(--line-height-relaxed);
}

.text-body {
  font-size: var(--font-size-body);
  line-height: var(--line-height-relaxed);
}

.text-body-sm {
  font-size: var(--font-size-body-sm);
  line-height: var(--line-height-normal);
}

.text-caption {
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-medium);
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--color-neutral-500);
}


/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-family);
  font-size: var(--font-size-button);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  letter-spacing: 0.01em;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-normal);
  -webkit-tap-highlight-color: transparent;
}

.btn:focus-visible {
  outline-offset: 2px;
}

/* Primary CTA */
.btn-primary {
  background-color: var(--color-accent-600);
  color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 16px 32px;
  min-height: 52px;
  box-shadow: var(--shadow-cta);
}

.btn-primary:hover {
  background-color: #B45309;
  box-shadow: var(--shadow-cta-hover);
}

.btn-primary:active {
  background-color: #92400E;
  box-shadow: none;
  transform: translateY(1px);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--color-accent-500);
}

.btn-primary:disabled {
  background-color: #FDE68A;
  color: #92400E;
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

/* Secondary */
.btn-secondary {
  background-color: transparent;
  color: var(--color-primary-800);
  border: 1.5px solid var(--color-neutral-300);
  border-radius: var(--radius-md);
  padding: 14px 28px;
  min-height: 48px;
}

.btn-secondary:hover {
  background-color: var(--color-primary-50);
  border-color: var(--color-primary-500);
}

.btn-secondary:active {
  background-color: var(--color-primary-100);
}

.btn-secondary:focus-visible {
  outline: 2px solid var(--color-primary-500);
}

/* Ghost */
.btn-ghost {
  background-color: transparent;
  color: var(--color-primary-500);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
}

.btn-ghost:hover {
  background-color: var(--color-primary-50);
  text-decoration: underline;
}

/* Mobile: full width buttons */
@media (max-width: 767px) {
  .btn-primary,
  .btn-secondary {
    width: 100%;
    padding-left: 24px;
    padding-right: 24px;
  }
}


/* ============================================
   CARDS
   ============================================ */

.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

@media (max-width: 767px) {
  .card {
    padding: var(--space-5);
  }
}

@media (hover: hover) {
  .card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
  }
}

/* Accent card (guarantees, highlights) */
.card-accent {
  background: linear-gradient(135deg, var(--color-accent-50) 0%, var(--color-accent-100) 100%);
  border: 1px solid #FDE68A;
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: none;
}

/* Review card */
.card-review {
  background-color: var(--color-white);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border-left: 4px solid var(--color-accent-500);
}


/* ============================================
   FORMS
   ============================================ */

.input {
  display: block;
  width: 100%;
  min-height: 48px;
  padding: 14px 16px;
  font-family: var(--font-family);
  font-size: 16px; /* Fixed 16px to prevent iOS zoom */
  font-weight: var(--font-weight-regular);
  color: var(--color-neutral-900);
  background-color: var(--color-white);
  border: 1.5px solid var(--color-neutral-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.input::placeholder {
  color: var(--color-neutral-400);
}

.input:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(58, 95, 153, 0.12);
}

.input-error {
  border-color: var(--color-error-500);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.label {
  display: block;
  font-size: 14px;
  font-weight: var(--font-weight-medium);
  color: var(--color-neutral-700);
  margin-bottom: 6px;
}

.field-error {
  font-size: var(--font-size-body-sm);
  color: var(--color-error-500);
  margin-top: var(--space-1);
}


/* ============================================
   BADGES
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-badge);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  white-space: nowrap;
}

.badge-trust {
  background-color: var(--color-success-50);
  color: var(--color-success-500);
  border: 1px solid #BBF7D0;
}

.badge-info {
  background-color: var(--color-primary-100);
  color: var(--color-primary-700);
}

.badge-accent {
  background-color: var(--color-accent-100);
  color: var(--color-accent-600);
}


/* ============================================
   LAYOUT
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding-mobile);
  padding-right: var(--container-padding-mobile);
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--container-padding-tablet);
    padding-right: var(--container-padding-tablet);
  }
}

.section {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

@media (min-width: 768px) {
  .section {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
  }
}

@media (min-width: 1280px) {
  .section {
    padding-top: var(--space-20);
    padding-bottom: var(--space-20);
  }
}

/* Section background variants */
.section-white    { background-color: var(--color-white); }
.section-light    { background-color: var(--color-neutral-100); }
.section-subtle   { background-color: var(--color-neutral-50); }
.section-warm     { background-color: var(--color-accent-50); }
.section-dark     { background: linear-gradient(160deg, #0F1B2D 0%, #1A2B45 60%, #243B5E 100%); }
.section-dark-alt { background: linear-gradient(135deg, #1A2B45 0%, #0F1B2D 100%); }

.section-dark .text-hero,
.section-dark .text-h2,
.section-dark .text-h3,
.section-dark-alt .text-hero,
.section-dark-alt .text-h2,
.section-dark-alt .text-h3 {
  color: var(--color-white);
}

.section-dark .text-body,
.section-dark .text-body-lg,
.section-dark-alt .text-body,
.section-dark-alt .text-body-lg {
  color: rgba(255, 255, 255, 0.8);
}

/* Grid */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); gap: var(--space-5); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); gap: var(--space-5); }
}

@media (min-width: 1280px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
}


/* ============================================
   STICKY CTA BAR (Mobile)
   ============================================ */

.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky-cta);
  background-color: var(--color-white);
  box-shadow: var(--shadow-sticky-bar);
  padding: 12px var(--container-padding-mobile);
  padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
}

@media (min-width: 768px) {
  .sticky-cta {
    display: none;
  }
}


/* ============================================
   REVIEW CAROUSEL (Mobile horizontal scroll)
   ============================================ */

.review-scroll {
  display: flex;
  gap: var(--space-4);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-padding: var(--space-4);
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--space-4);
}

.review-scroll::-webkit-scrollbar {
  display: none;
}

.review-scroll > .card-review {
  flex: 0 0 calc(100% - 32px);
  scroll-snap-align: start;
}

@media (min-width: 768px) {
  .review-scroll {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    overflow: visible;
    scroll-snap-type: none;
  }

  .review-scroll > .card-review {
    flex: none;
  }
}

@media (min-width: 1280px) {
  .review-scroll {
    grid-template-columns: repeat(3, 1fr);
  }
}


/* ============================================
   STAT NUMBER (300+, 4.9, 30%)
   ============================================ */

.stat-number {
  font-size: 3rem;    /* 48px mobile */
  font-weight: var(--font-weight-extrabold);
  line-height: 1;
  color: var(--color-accent-600);
}

.stat-label {
  font-size: var(--font-size-body-sm);
  font-weight: var(--font-weight-regular);
  color: var(--color-neutral-500);
  margin-top: var(--space-1);
}

@media (min-width: 1280px) {
  .stat-number {
    font-size: 4rem; /* 64px desktop */
  }
}