/* plotix — статический лендинг. Чистый CSS, без фреймворков (задача
   landing-page, 2026-07-30). Цвета/шрифты — те же токены, что в
   frontend/index.html (единственный источник стиля React-приложения,
   отдельного App.css в проекте нет). */

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

:root {
  --color-background-primary: #ffffff;
  --color-background-secondary: #f4f4f2;
  --color-background-tertiary: #ebebea;
  --color-background-info: #e6f1fb;
  --color-background-success: #eaf3de;
  --color-background-warning: #faeeda;
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #5f5e5a;
  --color-text-info: #185fa5;
  --color-text-success: #3b6d11;
  --color-border-tertiary: rgba(0, 0, 0, 0.1);
  --color-border-secondary: rgba(0, 0, 0, 0.2);
  --font-sans: system-ui, -apple-system, sans-serif;
  --font-mono: "Courier New", monospace;
  --radius-md: 8px;
  --radius-lg: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-background-primary: #1e1e1c;
    --color-background-secondary: #2a2a27;
    --color-background-tertiary: #333330;
    --color-background-info: #0c3055;
    --color-background-success: #1a3508;
    --color-background-warning: #3d2505;
    --color-text-primary: #f0ede8;
    --color-text-secondary: #b4b2a9;
    --color-text-info: #85b7eb;
    --color-text-success: #97c459;
    --color-border-tertiary: rgba(255, 255, 255, 0.1);
    --color-border-secondary: rgba(255, 255, 255, 0.2);
  }
}

html { scroll-behavior: smooth; }

body {
  background: var(--color-background-tertiary);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
}

.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

a { color: var(--color-text-info); }

/* ── Шапка ─────────────────────────────────────────────────────────── */

.site-header {
  background: var(--color-background-primary);
  border-bottom: 0.5px solid var(--color-border-tertiary);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 18px;
  color: var(--color-text-primary);
  text-decoration: none;
}

.brand img { width: 26px; height: 26px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 0.5px solid var(--color-border-secondary);
  border-radius: var(--radius-md);
  padding: 10px 18px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  background: var(--color-background-primary);
  color: var(--color-text-primary);
  transition: background 0.12s, transform 0.06s;
}

.btn:hover { background: var(--color-background-secondary); }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--color-text-info);
  border-color: var(--color-text-info);
  color: #fff;
}

.btn-primary:hover { opacity: 0.92; background: var(--color-text-info); }

.btn-lg { padding: 13px 26px; font-size: 15px; }

/* ── Hero ──────────────────────────────────────────────────────────── */

.hero { padding: 3.5rem 0 3rem; text-align: center; }

.hero h1 {
  font-size: clamp(26px, 4.2vw, 40px);
  line-height: 1.25;
  font-weight: 700;
  max-width: 760px;
  margin: 0 auto 1rem;
}

.hero .subtitle {
  font-size: 17px;
  color: var(--color-text-secondary);
  max-width: 620px;
  margin: 0 auto 1.75rem;
}

.hero .cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-bottom: 0.75rem;
}

.hero .cta-note {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ── Секции ────────────────────────────────────────────────────────── */

section { padding: 2.75rem 0; }

section + section { border-top: 0.5px solid var(--color-border-tertiary); }

.section-title {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.5rem;
}

.section-lead {
  text-align: center;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto 2.25rem;
  font-size: 15px;
}

/* ── Три опорных сообщения ─────────────────────────────────────────── */

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.pillar {
  background: var(--color-background-primary);
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.4rem;
}

.pillar .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--color-background-info);
  color: var(--color-text-info);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 0.9rem;
}

.pillar h3 {
  font-size: 17px;
  margin-bottom: 0.5rem;
  line-height: 1.35;
}

.pillar p {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.pillar .proof {
  margin-top: 0.75rem;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-success);
}

/* ── Скриншот ──────────────────────────────────────────────────────── */

.screenshot-frame {
  background: var(--color-background-primary);
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--radius-lg);
  padding: 10px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.screenshot-frame .screenshot-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: clamp(220px, 32vw, 420px);
  border-radius: 6px;
  background: var(--color-background-secondary);
  color: var(--color-text-secondary);
  font-size: 13px;
  overflow: hidden;
}

.screenshot-frame .screenshot-placeholder img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 6px;
}

/* ── Как это работает ──────────────────────────────────────────────── */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  counter-reset: step;
}

.step {
  text-align: center;
  padding: 0 0.5rem;
}

.step .num {
  counter-increment: step;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1.5px solid var(--color-text-info);
  color: var(--color-text-info);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin: 0 auto 0.75rem;
}

.step .num::before { content: counter(step); }

.step h3 { font-size: 15px; margin-bottom: 0.4rem; }
.step p { font-size: 13px; color: var(--color-text-secondary); }

/* ── Тарифы ────────────────────────────────────────────────────────── */

.pricing {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.price-card {
  background: var(--color-background-primary);
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.3rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.price-card.featured {
  border-color: var(--color-text-info);
  box-shadow: 0 0 0 1px var(--color-text-info);
}

.price-card .plan-name { font-size: 13px; font-weight: 600; color: var(--color-text-secondary); text-transform: uppercase; letter-spacing: 0.03em; }
.price-card .plan-price { font-size: 26px; font-weight: 700; }
.price-card .plan-price small { font-size: 13px; font-weight: 400; color: var(--color-text-secondary); }
.price-card .plan-desc { font-size: 13px; color: var(--color-text-secondary); flex-grow: 1; }

.badge-soon {
  display: inline-block;
  align-self: flex-start;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--color-background-warning);
  color: #854f0b;
}

/* ── Личная нота ───────────────────────────────────────────────────── */

.founder-note {
  background: var(--color-background-primary);
  border: 0.5px solid var(--color-border-tertiary);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.75rem;
  font-size: 14px;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

/* ── Footer ────────────────────────────────────────────────────────── */

.site-footer {
  background: var(--color-background-primary);
  border-top: 0.5px solid var(--color-border-tertiary);
  padding: 2rem 0;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.site-footer nav { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.site-footer nav a { color: var(--color-text-secondary); text-decoration: none; }
.site-footer nav a:hover { color: var(--color-text-info); }

/* ── Мобильная адаптация ───────────────────────────────────────────── */

@media (max-width: 760px) {
  .pillars, .steps, .pricing {
    grid-template-columns: 1fr;
  }
  .hero { padding: 2.5rem 0 2rem; }
  section { padding: 2rem 0; }
  .site-footer .wrap { flex-direction: column; align-items: flex-start; }
}

/* ── Статичные страницы (оферта/политика) ─────────────────────────── */

.legal {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

.legal h1 { font-size: 24px; margin-bottom: 0.5rem; }
.legal .updated { font-size: 13px; color: var(--color-text-secondary); margin-bottom: 1.5rem; }
.legal h2 { font-size: 17px; margin: 1.75rem 0 0.6rem; }
.legal p, .legal li { font-size: 14px; color: var(--color-text-secondary); margin-bottom: 0.5rem; }
.legal ul { padding-left: 1.25rem; margin-bottom: 0.75rem; }
.legal .draft-notice {
  background: var(--color-background-warning);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.1rem;
  font-size: 13px;
  color: #854f0b;
  margin-bottom: 1.75rem;
}
.legal a.back { display: inline-block; margin-bottom: 1.5rem; font-size: 13px; text-decoration: none; }