:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --border: #dbe3ea;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

a {
  color: inherit;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  box-sizing: border-box;
}

.hero {
  position: relative;
  z-index: 2;
  background-image: url("https://images.unsplash.com/photo-1504307651254-35680f356dfd?auto=format&fit=crop&w=1800&q=80");
  background-size: cover;
  background-position: center;
  color: #fff;
  padding: 24px 0 52px;
}

.overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(8, 47, 73, 0.82), rgba(15, 118, 110, 0.7));
}

.hero-content {
  position: relative;
  z-index: 1;
}

.page-sides {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(520px 720px at 0% 35%, rgba(20, 184, 166, 0.16), rgba(20, 184, 166, 0) 62%),
    radial-gradient(520px 720px at 100% 40%, rgba(59, 130, 246, 0.12), rgba(59, 130, 246, 0) 62%);
  opacity: 0.9;
}

.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  gap: 16px;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  opacity: 0.9;
}

.nav-links a:hover {
  opacity: 1;
}

.label {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  opacity: 0.8;
  margin: 0 0 8px;
}

h1 {
  margin: 0 0 10px;
  max-width: 760px;
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
}

.subtitle {
  margin: 0;
  max-width: 760px;
  line-height: 1.4;
}

.cta-link {
  margin-top: 18px;
  display: inline-block;
  background: #ffffff;
  color: #0f766e;
  font-weight: 700;
  border-radius: 10px;
  padding: 11px 16px;
  text-decoration: none;
}

.app-grid {
  margin-top: 22px;
  margin-bottom: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  position: relative;
  z-index: 1;
  min-width: 0;
}

/* Позволяет колонкам сетки сужаться под ширину экрана (иначе таблица/инпуты раздувают блок). */
.app-grid > .card {
  min-width: 0;
  max-width: 100%;
}

.calc-stack {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.calc-stack .price-card {
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

.features-section,
.features,
.footer {
  position: relative;
  z-index: 1;
}

.card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.97), rgba(255, 255, 255, 0.93));
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.06);
}

h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

form {
  display: grid;
  gap: 12px;
}

form label {
  margin: 0;
}

label {
  display: grid;
  gap: 6px;
  font-size: 0.95rem;
}

.field-tip {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.25;
}

input,
select,
button {
  border-radius: 8px;
  border: 1px solid var(--border);
  padding: 10px;
  font-size: 0.95rem;
}

input,
select {
  min-height: 42px;
  line-height: 1.2;
  width: 100%;
  min-width: 0;
  max-width: 100%;
}

select {
  background-color: #ffffff;
}

button {
  background: var(--accent);
  color: #fff;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease;
}

button:hover {
  background: var(--accent-dark);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.secondary-action {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}

.secondary-action:hover:not(:disabled) {
  background: color-mix(in srgb, var(--accent) 12%, #ffffff 88%);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  align-items: start;
}

.form-error {
  min-height: 1.2em;
  font-size: 0.9rem;
}

.error-text {
  color: #b91c1c;
}

.summary {
  background: color-mix(in srgb, var(--card) 80%, #ffffff 20%);
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 12px;
  line-height: 1.4;
}

.muted {
  color: var(--muted);
}

.table-wrap {
  overflow-x: auto;
  overflow-y: visible;
  -webkit-overflow-scrolling: touch;
  min-width: 0;
  max-width: 100%;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th,
td {
  border-bottom: 1px solid var(--border);
  text-align: left;
  padding: 10px 6px;
  vertical-align: top;
  overflow-wrap: anywhere;
}

th {
  font-size: 0.82rem;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: 0.03em;
}

.result-actions {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.action-note {
  margin-bottom: 0;
}

.price-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.97), rgba(255, 255, 255, 0.92));
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 20px;
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.06);
}

.footer {
  margin-top: 24px;
  background: #0f172a;
  color: #cbd5e1;
  font-size: 0.9rem;
  padding: 28px 0;
}

.footer h3 {
  color: #ffffff;
  margin-top: 0;
  margin-bottom: 10px;
}

.footer p {
  margin: 6px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.features-section {
  padding: 10px 0 4px;
  min-width: 0;
}

.features-head {
  text-align: center;
  max-width: 560px;
  margin: 0 auto 26px;
  width: 100%;
  min-width: 0;
  padding-inline: 2px;
  box-sizing: border-box;
}

.features-kicker {
  color: var(--accent);
  opacity: 1;
  margin-bottom: 10px;
}

.features-title {
  margin: 0 0 12px;
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #0f172a;
  line-height: 1.2;
}

.features-title::after {
  content: "";
  display: block;
  width: 56px;
  height: 3px;
  margin: 14px auto 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), rgba(59, 130, 246, 0.55));
}

.features-sub {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.45;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 12px;
  min-width: 0;
  width: 100%;
  align-items: stretch;
  justify-items: stretch;
}

.features > .feature-card {
  min-width: 0;
  max-width: 100%;
  width: 100%;
}

.feature-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  box-sizing: border-box;
}

.feature-card h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.feature-card p {
  margin: 0;
  line-height: 1.5;
  overflow-wrap: break-word;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

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

@media (max-width: 940px) {
  .app-grid,
  .grid-2,
  .result-actions,
  .features,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .top-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .card {
    padding: 14px;
  }

  .app-grid table {
    font-size: 0.82rem;
  }

  .app-grid th,
  .app-grid td {
    padding: 8px 5px;
  }

  .features-section {
    padding: 8px 0 6px;
  }

  .features-head {
    margin-bottom: 16px;
  }

  .features {
    gap: 12px;
  }

  .feature-card {
    padding: 14px 16px;
  }
}

@media (max-width: 420px) {
  .container {
    padding-left: max(12px, env(safe-area-inset-left, 0px));
    padding-right: max(12px, env(safe-area-inset-right, 0px));
  }

  .app-grid th,
  .app-grid td {
    padding: 7px 4px;
    font-size: 0.78rem;
  }
}