/* ============================================================
   BETON-GIBRID.BY — Main Stylesheet
   Palette: deep navy primary, concrete gray surfaces, orange accent
   ============================================================ */

/* --- DESIGN TOKENS --- */
:root,
[data-theme="light"] {
  /* Type scale */
  --text-xs:   clamp(0.75rem,  0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.75vw,   1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem + 2.5vw,  3.5rem);
  --text-hero: clamp(2.5rem,   1.5rem + 4vw,    5rem);

  /* Spacing */
  --space-1: 0.25rem; --space-2: 0.5rem;  --space-3: 0.75rem;
  --space-4: 1rem;    --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem;    --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem;   --space-20: 5rem;   --space-24: 6rem;

  /* Colors — Industrial Concrete + Safety Orange */
  --color-bg: #f5f4f0;
  --color-surface: #faf9f6;
  --color-surface-2: #ffffff;
  --color-surface-offset: #edecea;
  --color-divider: #dcdad5;
  --color-border: #cbc9c3;

  --color-text: #1a1917;
  --color-text-muted: #6b6a66;
  --color-text-faint: #b0aea9;
  --color-text-inverse: #f9f8f4;

  /* Primary — Deep Steel Blue (доверие, профессионализм) */
  --color-primary: #1a3a5c;
  --color-primary-hover: #0f2a47;
  --color-primary-active: #081d32;
  --color-primary-highlight: #d4dde8;

  /* Accent — Safety Orange (строительство, энергия) */
  --color-accent: #e85d04;
  --color-accent-hover: #c94e00;
  --color-accent-active: #a83f00;
  --color-accent-highlight: #fde8d8;

  --color-success: #2d7a3a;
  --color-success-highlight: #d1ead4;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 3px rgba(26,57,92,0.08);
  --shadow-md: 0 4px 16px rgba(26,57,92,0.10);
  --shadow-lg: 0 12px 40px rgba(26,57,92,0.14);

  --content-default: 1200px;
  --content-narrow: 800px;

  --font-display: 'Oswald', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
}

[data-theme="dark"] {
  --color-bg: #111214;
  --color-surface: #16181a;
  --color-surface-2: #1c1f22;
  --color-surface-offset: #1a1d20;
  --color-divider: #252829;
  --color-border: #32363a;
  --color-text: #d0ceca;
  --color-text-muted: #7a7875;
  --color-text-faint: #565350;
  --color-text-inverse: #1a1917;
  --color-primary: #4a7fb5;
  --color-primary-hover: #6595c7;
  --color-primary-active: #80abd8;
  --color-primary-highlight: #1e2d3d;
  --color-accent: #ff7a2e;
  --color-accent-hover: #ff9555;
  --color-accent-active: #ffb07d;
  --color-accent-highlight: #3d1f0a;
  --color-success: #4aaa5a;
  --color-success-highlight: #1a3520;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #111214;
    --color-surface: #16181a;
    --color-surface-2: #1c1f22;
    --color-surface-offset: #1a1d20;
    --color-divider: #252829;
    --color-border: #32363a;
    --color-text: #d0ceca;
    --color-text-muted: #7a7875;
    --color-text-faint: #565350;
    --color-primary: #4a7fb5;
    --color-primary-hover: #6595c7;
    --color-primary-highlight: #1e2d3d;
    --color-accent: #ff7a2e;
    --color-accent-hover: #ff9555;
    --color-accent-highlight: #3d1f0a;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  }
}

/* --- BASE RESET --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}
body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}
img, video { display: block; max-width: 100%; height: auto; }
ul[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li { text-wrap: pretty; max-width: 72ch; }
button { cursor: pointer; background: none; border: none; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
::selection { background: rgba(26,58,92,0.2); color: var(--color-text); }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; border-radius: var(--radius-sm); }

/* --- LAYOUT --- */
.container {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2.5rem);
}

.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}
.section--offset { background: var(--color-surface-offset); }
.section--dark {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
[data-theme="dark"] .section--dark { background: #0d1f33; color: var(--color-text); }

.section__header { text-align: center; margin-bottom: clamp(var(--space-8), 5vw, var(--space-16)); }
.section__header--light .section__title { color: var(--color-text-inverse); }
[data-theme="dark"] .section__header--light .section__title { color: var(--color-text); }
.section__header--light .section__sub { color: rgba(255,255,255,0.75); }
[data-theme="dark"] .section__header--light .section__sub { color: var(--color-text-muted); }

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
[data-theme="dark"] .section__title { color: var(--color-primary); }

.section__sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-inline: auto;
}

/* --- HEADER --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245,244,240,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition);
}
[data-theme="dark"] .header { background: rgba(17,18,20,0.95); }
.header--scrolled { box-shadow: var(--shadow-sm); }

.header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  text-decoration: none;
}
.logo__text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text);
}
.logo__text strong { color: var(--color-accent); font-weight: 700; }

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin-left: auto;
}
.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
  white-space: nowrap;
}
.nav__link:hover { color: var(--color-accent); }

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}
.header__phone {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
}
[data-theme="dark"] .header__phone { color: var(--color-primary); }

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform 80ms;
  white-space: nowrap;
}
.btn:active { transform: scale(0.98); }
.btn--primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn--primary:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); }
.btn--outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}
.btn--outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; }
.btn--lg { padding: var(--space-4) var(--space-8); font-size: var(--text-base); border-radius: var(--radius-lg); }
.btn--full { width: 100%; }

/* BADGE */
.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge--accent { background: var(--color-accent-highlight); color: var(--color-accent); }

/* --- BURGER --- */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
}
.burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* --- HERO --- */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(10,25,50,0.82) 0%,
    rgba(10,25,50,0.55) 55%,
    rgba(10,25,50,0.25) 100%
  );
}
.hero__content {
  position: relative;
  z-index: 1;
  padding-block: clamp(var(--space-16), 10vw, var(--space-24));
  max-width: 680px;
}
.hero__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}
.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: #fff;
  line-height: 1.05;
  margin-bottom: var(--space-5);
}
.hero__title .accent { color: var(--color-accent); }
.hero__sub {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.85);
  margin-bottom: var(--space-8);
  max-width: 50ch;
  line-height: 1.7;
}
.hero__cta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-12);
}
.hero__stats {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
}
.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.stat__num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: #fff;
  line-height: 1;
}
.stat__label {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- SERVICES --- */
.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: var(--space-6);
}
.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: box-shadow var(--transition), transform var(--transition);
}
.service-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.service-card--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  padding: 0;
  overflow: hidden;
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}
[data-theme="dark"] .service-card--featured { background: #0d1f33; color: var(--color-text); }
.service-card--featured .service-card__body { padding: var(--space-8); }
.service-card__img { overflow: hidden; }
.service-card__img img { width: 100%; height: 100%; object-fit: cover; min-height: 260px; }
.service-card--featured .service-card__text { color: rgba(255,255,255,0.8); }
[data-theme="dark"] .service-card--featured .service-card__text { color: var(--color-text-muted); }
.service-card__icon {
  margin-bottom: var(--space-5);
}
.service-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-3);
  color: var(--color-primary);
}
.service-card--featured .service-card__title { color: #fff; }
[data-theme="dark"] .service-card--featured .service-card__title { color: var(--color-text); }
[data-theme="dark"] .service-card__title { color: var(--color-primary); }
.service-card__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
  line-height: 1.7;
}
.service-card__features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.service-card__features li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
  max-width: none;
}
.service-card--featured .service-card__features li { color: rgba(255,255,255,0.7); }
[data-theme="dark"] .service-card--featured .service-card__features li { color: var(--color-text-muted); }
.service-card__features li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* --- GRADES --- */
.grades-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}
.grade-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow var(--transition), border-color var(--transition);
  position: relative;
}
.grade-card:hover { box-shadow: var(--shadow-md); border-color: var(--color-primary); }
.grade-card--popular {
  border-color: var(--color-accent);
  background: var(--color-surface-2);
}
.grade-card .badge { margin-bottom: var(--space-3); }
.grade-card__mark {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.03em;
  margin-bottom: var(--space-2);
}
.grade-card__name {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.grade-card__use {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.5;
  max-width: none;
}
.grades-note {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.grades-note a { color: var(--color-accent); font-weight: 600; }
.grades-note a:hover { text-decoration: underline; }

/* --- CALCULATOR --- */
.calculator {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.calc-form {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.form-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}
.form-input, .form-select {
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  color: var(--color-text);
  font-size: var(--text-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
  -webkit-appearance: none;
}
.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(232,93,4,0.12);
}
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b6a66' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: var(--space-8);
}
.form-textarea { resize: vertical; min-height: 80px; }

.calc-result {
  background: var(--color-surface-offset);
  border-left: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
}
.calc-result__inner { width: 100%; }
.calc-result__icon { margin-bottom: var(--space-4); }
.calc-result__hint {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  text-align: center;
  max-width: 30ch;
  margin-inline: auto;
}
.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
  font-size: var(--text-sm);
}
.result-row--total {
  border-bottom: none;
  padding-top: var(--space-4);
  font-size: var(--text-base);
  font-weight: 700;
}
.result-row--total strong { font-size: var(--text-lg); color: var(--color-accent); }
.calc-result__note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-block: var(--space-4);
  max-width: none;
}

/* --- BENEFITS --- */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}
.benefit { display: flex; flex-direction: column; gap: var(--space-3); }
.benefit__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
}
[data-theme="dark"] .benefit__icon { background: rgba(255,255,255,0.05); }
.benefit__icon svg path, .benefit__icon svg circle {
  stroke: rgba(255,255,255,0.85);
}
[data-theme="dark"] .benefit__icon svg path,
[data-theme="dark"] .benefit__icon svg circle {
  stroke: var(--color-primary);
}
.benefit__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #fff;
}
[data-theme="dark"] .benefit__title { color: var(--color-text); }
.benefit__text {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.7);
  line-height: 1.65;
}
[data-theme="dark"] .benefit__text { color: var(--color-text-muted); }

/* --- STEPS --- */
.steps {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  counter-reset: step;
}
.step {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: box-shadow var(--transition);
}
.step:hover { box-shadow: var(--shadow-md); }
.step__num {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}
.step__arrow {
  font-size: 1.5rem;
  color: var(--color-text-faint);
  margin-top: var(--space-4);
  align-self: flex-start;
  padding-top: var(--space-5);
}
.step__title {
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-text);
}
.step__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* --- ORDER BLOCK --- */
.order-block {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-12);
  align-items: start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-8), 5vw, var(--space-12));
  box-shadow: var(--shadow-lg);
}
.order-block .section__title { text-align: left; }
.order-block p { color: var(--color-text-muted); margin-block: var(--space-4); font-size: var(--text-sm); }

.contact-info { display: flex; flex-direction: column; gap: var(--space-3); margin-block: var(--space-6); }
.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.contact-item:hover { color: var(--color-accent); }
.contact-item svg { color: var(--color-accent); flex-shrink: 0; }

.social-links { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.social-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  text-decoration: none;
  transition: opacity var(--transition);
}
.social-btn:hover { opacity: 0.85; }
.social-btn--viber { background: #7360f2; color: #fff; }

.order-form { display: flex; flex-direction: column; gap: var(--space-5); }
.form-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-align: center;
  max-width: none;
}
.form-success {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-success-highlight);
  border-radius: var(--radius-md);
  color: var(--color-success);
  font-size: var(--text-sm);
  font-weight: 600;
}

/* --- FOOTER --- */
.footer {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding-top: clamp(var(--space-12), 6vw, var(--space-20));
}
[data-theme="dark"] .footer { background: #0a1523; }
.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: var(--space-8);
  padding-bottom: var(--space-12);
}
.footer__brand .logo { margin-bottom: var(--space-4); }
.footer__brand .logo__text { color: #fff; }
.footer__tagline { font-size: var(--text-sm); color: rgba(255,255,255,0.6); line-height: 1.5; }
.footer__heading {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.5);
  margin-bottom: var(--space-4);
}
.footer__list { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); }
.footer__list a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  transition: color var(--transition);
}
.footer__list a:hover { color: var(--color-accent); }
.footer__contacts li { font-size: var(--text-sm); color: rgba(255,255,255,0.75); line-height: 1.5; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-block: var(--space-6);
}
.footer__bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.footer__bottom p { font-size: var(--text-xs); color: rgba(255,255,255,0.4); max-width: none; }

/* ============================================================
   MESSENGER BUTTONS
   ============================================================ */
.hero__messengers {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-6);
}
.messenger-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: #fff;
  text-decoration: none;
  transition: opacity var(--transition), transform 80ms;
  border: none;
  cursor: pointer;
}
.messenger-btn:hover { opacity: 0.88; transform: scale(0.98); }
.messenger-btn--viber { background: #7360f2; }
.messenger-btn--telegram { background: #2AABEE; }

/* Contact section social buttons */
.social-btn--viber { background: #7360f2; color: #fff; }
.social-btn--telegram { background: #2AABEE; color: #fff; }
.social-btn--viber:hover,
.social-btn--telegram:hover { opacity: 0.88; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .benefits-grid { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { grid-template-columns: 1fr 1fr; }
  .steps { flex-wrap: wrap; }
  .step__arrow { display: none; }
  .step { flex: 1 1 calc(50% - var(--space-4)); }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .nav.nav--open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-surface);
    padding: var(--space-6);
    gap: var(--space-5);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    z-index: 99;
  }
  .burger { display: flex; }
  .header__phone { display: none; }

  .hero { min-height: 85vh; }
  .hero__cta { flex-direction: column; }
  .hero__cta .btn { width: 100%; text-align: center; justify-content: center; }
  .hero__stats { gap: var(--space-5); }
  .hero__messengers { gap: var(--space-2); }
  .messenger-btn { padding: var(--space-2) var(--space-4); font-size: var(--text-xs); }

  .services-grid { grid-template-columns: 1fr; }
  .service-card--featured { display: block; }
  .service-card--featured .service-card__img img { min-height: 200px; }

  .calculator { grid-template-columns: 1fr; }
  .calc-result { border-left: none; border-top: 1px solid var(--color-border); }
  .form-row { grid-template-columns: 1fr; }

  .benefits-grid { grid-template-columns: 1fr; gap: var(--space-6); }

  .order-block { grid-template-columns: 1fr; gap: var(--space-8); }

  .footer__inner { grid-template-columns: 1fr 1fr; }
  .footer__bottom .container { flex-direction: column; text-align: center; }

  .step { flex: 1 1 100%; }
  .grades-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .footer__inner { grid-template-columns: 1fr; }
  .grades-grid { grid-template-columns: 1fr; }
  .hero__stats { flex-direction: column; gap: var(--space-4); }
}

/* ============================================================
   SEO TEXT BLOCK
   ============================================================ */
.seo-text {
  background: var(--color-bg-alt);
  padding: var(--space-12) 0;
  border-top: 1px solid var(--color-border);
}
.seo-text h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.seo-text p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.8;
  margin-bottom: var(--space-3);
  max-width: 860px;
}
.seo-text p:last-child { margin-bottom: 0; }
.seo-text a { color: var(--color-accent); text-decoration: none; }
.seo-text a:hover { text-decoration: underline; }

/* ============================================================
   FAQ
   ============================================================ */
.faq { padding: var(--space-16) 0; background: var(--color-surface); }
.faq__list { margin-top: var(--space-8); display: flex; flex-direction: column; gap: var(--space-3); max-width: 860px; }
.faq__item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg);
}
.faq__question {
  padding: var(--space-4) var(--space-6);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}
.faq__question::-webkit-details-marker { display: none; }
.faq__question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition);
}
details[open] .faq__question::after { content: '−'; }
.faq__answer {
  padding: 0 var(--space-6) var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}
.faq__answer a { color: var(--color-accent); }

/* ============================================================
   PRICING
   ============================================================ */
.pricing { padding: var(--space-16) 0; background: var(--color-bg-alt); }
.pricing__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); margin-top: var(--space-10); }
.pricing__card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-8); display: flex; flex-direction: column; gap: var(--space-4); position: relative; }
.pricing__card--featured { border-color: var(--color-accent); box-shadow: var(--shadow-lg); }
.pricing__badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--color-accent); color: #fff; font-size: var(--text-xs); font-weight: 700; padding: 4px 14px; border-radius: var(--radius-full); white-space: nowrap; }
.pricing__icon { color: var(--color-accent); }
.pricing__card h3 { font-family: var(--font-display); font-size: var(--text-xl); color: var(--color-text); }
.pricing__price { font-size: var(--text-lg); color: var(--color-text-muted); }
.pricing__price span { font-size: var(--text-2xl); font-weight: 700; color: var(--color-accent); }
.pricing__card ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-2); flex: 1; }
.pricing__card ul li { font-size: var(--text-sm); color: var(--color-text-muted); padding-left: var(--space-5); position: relative; }
.pricing__card ul li::before { content: '✓'; position: absolute; left: 0; color: var(--color-accent); font-weight: 700; }
.pricing__note { margin-top: var(--space-6); font-size: var(--text-xs); color: var(--color-text-muted); text-align: center; }
.pricing__note a { color: var(--color-accent); }
@media (max-width: 768px) { .pricing__grid { grid-template-columns: 1fr; } }

/* ============================================================
   OBJECTS GALLERY
   ============================================================ */
.objects { padding: var(--space-16) 0; background: var(--color-bg); }
.objects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: var(--space-10);
}
.objects__item {
  overflow: hidden;
  border-radius: var(--radius-lg);
  aspect-ratio: 4/3;
  background: var(--color-bg-alt);
}
.objects__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
  display: block;
}
.objects__item:hover img { transform: scale(1.05); }
@media (max-width: 768px) {
  .objects__grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
}
@media (max-width: 480px) {
  .objects__grid { grid-template-columns: 1fr; }
}