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

:root {
  --bg: #f7f6f3;
  --bg2: #eeecea;
  --surface: #ffffff;
  --surface2: #f0ede8;
  --dark: #1e1e1e;
  --dark2: #2c2c2c;
  --muted: #7a7670;
  --border: rgba(0, 0, 0, 0.08);
  --accent: #d97a3a;
  --accent2: #e8a86a;
  --accentbg: #fef3e8;
  --blue: #3a6dd9;
  --bluebg: #ebf0fd;
  --green: #2da464;
  --greenbg: #e8f7ef;
  --red: #912525;
  --radius: 18px;
  --radiusSm: 10px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ─── NAV ─── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  height: 68px;
  background: rgba(247, 246, 243, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--dark);
  text-decoration: none;
}
.nav-logo span {
  color: var(--accent);
}
.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}
.nav-links a {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
  font-weight: 500;
}
.nav-links a:hover {
  color: var(--dark);
}
.nav-actions {
  display: flex;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 20px;
  border-radius: 9px;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s;
  border: none;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: #c46828;
}
.btn-secondary {
  background: var(--surface);
  color: var(--dark);
  border: 1.5px solid var(--border);
}
.btn-secondary:hover {
  border-color: rgba(0, 0, 0, 0.22);
}
.btn-dark {
  background: var(--dark);
  color: #fff;
}
.btn-dark:hover {
  background: #111;
}

/* ─── HERO ─── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 110px 48px 70px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--greenbg);
  border: 1px solid rgba(45, 164, 100, 0.2);
  border-radius: 100px;
  padding: 5px 14px;
  margin-bottom: 24px;
  font-size: 12px;
  font-weight: 600;
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.hero-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}
.hero h1 {
  font-size: clamp(38px, 4.5vw, 60px);
  font-weight: 800;
  line-height: 1.07;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
  color: var(--dark);
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
}
.hero-desc {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 460px;
}
.hero-ctas {
  display: flex;
  gap: 10px;
}
.hero-ctas .btn {
  padding: 14px 26px;
  font-size: 15px;
  border-radius: 10px;
}

/* Hero right — фото + карточки */
.hero-right {
  position: relative;
}
.hero-photo {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: var(--radius);
  object-fit: cover;
  display: block;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}
.hero-cards-float {
  position: absolute;
  bottom: -20px;
  left: -20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.hero-chip {
  background: var(--surface);
  border-radius: 12px;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  white-space: nowrap;
}
.hero-chip-icon {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.hero-chip-icon svg {
  width: 18px;
  height: 18px;
  stroke-width: 1.8;
  fill: none;
}
.hero-chip-val {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--dark);
}
.hero-chip-sub {
  font-size: 11px;
  color: var(--muted);
  margin-top: 1px;
}

/* ─── STATS STRIP ─── */
.stats {
  background: var(--dark2);
  padding: 52px 48px;
}
.stats-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}
.stat-item {
  padding: 0 36px;
  border-right: 1px solid rgba(255, 255, 255, 0.1);
}
.stat-item:first-child {
  padding-left: 0;
}
.stat-item:last-child {
  border-right: none;
}
.stat-num {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: #fff;
  line-height: 1;
}
.stat-num span {
  font-size: 26px;
  font-weight: 600;
  color: var(--accent2);
}
.stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 6px;
  line-height: 1.4;
}

/* ─── SECTION COMMONS ─── */
.section {
  padding: 96px 48px;
}
.section-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(28px, 3.2vw, 42px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 14px;
  color: var(--dark);
}
.section-sub {
  font-size: 16px;
  color: var(--muted);
  max-width: 500px;
  line-height: 1.65;
}

/* ─── ADVANTAGES ─── */
.advantages {
  background: var(--bg);
}
.adv-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 48px;
}
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.adv-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  transition:
    box-shadow 0.2s,
    transform 0.2s;
}
.adv-card:hover {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}
.adv-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.adv-icon svg {
  width: 22px;
  height: 22px;
  stroke-width: 1.6;
  fill: none;
}
.adv-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--dark);
  letter-spacing: -0.01em;
}
.adv-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.65;
}
.contact-icon svg {
  width: 18px;
  height: 18px;
  stroke-width: 1.6;
  fill: none;
}

/* ─── MATERIALS TABLE ─── */
.materials {
  background: var(--surface);
}
.mat-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 30px;
  background: var(--bg2);
  padding: 4px;
  border-radius: 10px;
  width: fit-content;
}
.mat-tab {
  padding: 9px 22px;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--muted);
  transition: all 0.18s;
  font-family: 'Inter', sans-serif;
}
.mat-tab.active {
  background: var(--surface);
  color: var(--dark);
  font-weight: 600;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.1);
}
.mat-table {
  width: 100%;
  border-collapse: collapse;
}
.mat-table thead tr {
  border-bottom: 2px solid var(--bg2);
}
.mat-table th {
  text-align: left;
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0 0 14px;
}
.mat-table th:not(:first-child) {
  text-align: right;
}
.mat-table td {
  padding: 16px 0;
  font-size: 15px;
  color: var(--dark);
  border-bottom: 1px solid var(--bg2);
  vertical-align: top;
}
.mat-table td:not(:first-child) {
  text-align: right;
}
.mat-table tr:last-child td {
  border-bottom: none;
}
.mat-grade {
  font-weight: 700;
  font-size: 16px;
}
.mat-class {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}
.mat-use {
  font-size: 13px;
  color: var(--muted);
  max-width: 280px;
}
.mat-price {
  font-weight: 800;
  font-size: 17px;
  color: var(--dark);
}
.mat-price-unit {
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
}
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
}
.badge-pop {
  background: var(--greenbg);
  color: var(--green);
}
.badge-new {
  background: var(--bluebg);
  color: var(--blue);
}
.mat-cta-row {
  display: flex;
  justify-content: flex-end;
  margin-top: 28px;
}

/* ─── CALCULATOR ─── */
.calculator {
  background: var(--dark2);
}
.calculator .section-tag {
  color: var(--accent2);
}
.calculator .section-title {
  color: #fff;
}
.calculator .section-sub {
  color: rgba(255, 255, 255, 0.5);
}
.calc-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.calc-form {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 36px;
}
.calc-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 26px;
  letter-spacing: -0.02em;
  color: #fff;
}
.form-row {
  margin-bottom: 18px;
}
.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 7px;
}
.form-select,
.form-input {
  width: 100%;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 9px;
  padding: 12px 16px;
  color: #fff;
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  transition: border-color 0.18s;
  outline: none;
  appearance: none;
}
.form-select:focus,
.form-input:focus {
  border-color: rgba(255, 255, 255, 0.35);
}
.form-select option {
  background: var(--dark2);
}
.select-wrap {
  position: relative;
}
.select-wrap::after {
  content: '↓';
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255, 255, 255, 0.4);
  pointer-events: none;
  font-size: 13px;
}
.form-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.calc-result {
  background: rgba(217, 122, 58, 0.15);
  border: 1px solid rgba(217, 122, 58, 0.3);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.calc-result-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}
.calc-result-price {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #fff;
}
.calc-result-sub {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.35);
  margin-top: 2px;
  text-align: right;
}
.calc-btn {
  width: 100%;
  padding: 15px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
}

.calc-info {
  padding-top: 16px;
}
.calc-info-title {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
  line-height: 1.15;
  color: #fff;
}
.calc-info-title em {
  font-style: normal;
  color: var(--accent2);
}
.calc-steps {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 28px;
}
.calc-step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}
.calc-step-num {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
  color: rgba(255, 255, 255, 0.4);
}
.calc-step-text {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.55;
  padding-top: 5px;
}
.calc-step-text strong {
  color: #fff;
}

/* ─── FAQ ─── */
.faq {
  background: var(--bg);
}
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 48px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: box-shadow 0.2s;
}
.faq-item:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 22px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--dark);
  gap: 16px;
  user-select: none;
}
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--bg2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 16px;
  color: var(--muted);
  transition:
    transform 0.22s,
    background 0.22s;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--accent);
  color: #fff;
}
.faq-a {
  padding: 0 22px;
  max-height: 0;
  overflow: hidden;
  transition:
    max-height 0.3s ease,
    padding 0.3s;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}
.faq-item.open .faq-a {
  max-height: 300px;
  padding: 0 22px 20px;
}

/* ─── CALLBACK ─── */
.callback {
  background: var(--bg2);
}
.callback-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}
.callback-left .section-title {
  margin-bottom: 14px;
}
.callback-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 34px;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.06);
}
.callback-form .form-input {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 9px;
  padding: 12px 16px;
  color: var(--dark);
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  transition: border-color 0.18s;
  outline: none;
  width: 100%;
  margin-bottom: 12px;
}
.callback-form .form-input:focus {
  border-color: var(--accent);
}
.callback-form textarea.form-input {
  resize: none;
  height: 90px;
}
.cb-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 6px;
  gap: 14px;
}
.cb-policy {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}
.cb-policy a {
  color: var(--muted);
}
.cb-btn {
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  flex-shrink: 0;
}

/* ─── FOOTER ─── */
footer {
  background: var(--dark);
  padding: 52px 48px 36px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  gap: 48px;
}
.footer-brand .f-logo {
  display: block;
  margin-bottom: 10px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #fff;
  text-decoration: none;
}
.footer-brand .f-logo span {
  color: var(--accent);
}
.footer-brand p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  max-width: 260px;
  line-height: 1.6;
}
.footer-phone {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: 18px;
}
.footer-phone a {
  color: #fff;
  text-decoration: none;
}
.footer-phone a:hover {
  color: var(--accent2);
}
.footer-cols {
  display: flex;
  gap: 48px;
}
.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
  transition: color 0.18s;
}
.footer-col a:hover {
  color: #fff;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.3);
}

/* ─── TOAST ─── */
.toast {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 999;
  background: var(--dark);
  color: #fff;
  padding: 14px 20px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
  transform: translateY(80px);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  display: flex;
  align-items: center;
  gap: 10px;
}

.toast-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
  color: #fff;
}

.toast-icon.success {
  background: var(--green);
}

.toast-icon.error {
  background: var(--red);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

@media (max-width: 960px) {
  nav {
    padding: 0 20px;
  }
  .nav-links {
    display: none;
  }
  .hero {
    padding: 96px 20px 60px;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-right {
    display: none;
  }
  .stats {
    padding: 40px 20px;
  }
  .stats-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }
  .stat-item {
    padding: 0;
    border: none;
  }
  .section {
    padding: 60px 20px;
  }
  .adv-grid {
    grid-template-columns: 1fr;
  }
  .photo-row,
  .photo-row-2 {
    grid-template-columns: 1fr 1fr;
  }
  .photo-item.tall {
    grid-row: auto;
  }
  .faq-grid {
    grid-template-columns: 1fr;
  }
  .calc-wrapper {
    grid-template-columns: 1fr;
  }
  .calc-info {
    display: none;
  }
  .callback-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .footer-top {
    flex-direction: column;
  }
  .footer-cols {
    flex-wrap: wrap;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }
  .adv-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}