/* ЦЭС ФЕДАТ — корпоративный лендинг. Институциональный стиль. */

:root {
  --color-primary: #1A56DB;
  --color-text: #0F172A;
  --color-accent: #F97316;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8FAFC;
  --color-success: #10B981;
  --color-border: #E2E8F0;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 8px;
  --radius-card: 12px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --transition: 200ms ease-out;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  margin: 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Шапка */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1020;
}

.site-header .navbar {
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.fedat-logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-accent);
}

.fedat-logo:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.site-header .nav-link {
  color: var(--color-text);
  font-weight: 500;
  padding: 0.5rem 0.75rem;
}

.site-header .nav-link:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.btn-download {
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  font-weight: 500;
  transition: box-shadow var(--transition), transform var(--transition);
}

.btn-download:hover {
  box-shadow: var(--shadow-md);
}

.btn-athlete {
  color: var(--color-text);
  font-weight: 500;
}

.btn-athlete:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* Кнопки */
.btn-accent {
  background-color: var(--color-accent);
  border: none;
  color: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  font-weight: 500;
  transition: box-shadow var(--transition), filter var(--transition);
}

.btn-accent:hover {
  filter: brightness(1.05);
  box-shadow: var(--shadow-md);
  color: #fff;
}

.btn-outline-primary {
  border-radius: var(--radius);
}

/* Hero */
.hero {
  position: relative;
  padding: 4rem 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, #0F172A 100%);
  color: #fff;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.08;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z' fill='%23fff'/%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
  position: relative;
  max-width: 42rem;
}

.hero-title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.1rem;
  opacity: 0.95;
  margin-bottom: 1.5rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-cta .btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border-color: #fff;
}

/* Секции */
.section {
  padding: 3.5rem 0;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--color-text);
}

.section-why {
  background: var(--color-bg);
}

.section-how {
  background: var(--color-bg-alt);
}

.section-metrics {
  background: var(--color-bg);
}

.section-coop {
  background: var(--color-bg-alt);
}

.section-coop .btn-accent:hover {
  background-color: var(--color-primary);
  filter: none;
  box-shadow: var(--shadow-md);
  color: #fff;
}

.section-compliance {
  background: var(--color-bg-alt);
}

/* Карточки */
.card-feature,
.card-kpi,
.card-chart,
.card-coop {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

.card-feature:hover,
.card-coop:hover {
  box-shadow: var(--shadow-md);
}

.card-feature .card-title,
.card-coop .card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.card-kpi {
  border-left: 4px solid var(--color-primary);
}

.kpi-big {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.card-chart .chart-wrapper {
  position: relative;
  min-height: 200px;
}

/* Пилотный регион KPI */
.pilot-kpi {
  padding: 1.5rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius-card);
}

.kpi-block {
  text-align: center;
  padding: 1rem;
  background: var(--color-bg);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.kpi-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.kpi-label {
  font-size: 0.875rem;
  color: var(--color-text);
  opacity: 0.85;
}

/* Как это работает */
.steps-horizontal {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  align-items: start;
}

.step-item {
  text-align: center;
  padding: 1.25rem;
  background: var(--color-bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
}

.step-num {
  width: 2.5rem;
  height: 2.5rem;
  margin: 0 auto 0.75rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.ecosystem-diagram {
  padding: 1.5rem;
  background: var(--color-bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
}

.ecosystem-chain {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.ecosystem-node {
  padding: 0.5rem 0.75rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
}

.ecosystem-arrow {
  color: var(--color-primary);
  font-size: 1.25rem;
}

@media (max-width: 768px) {
  .ecosystem-arrow { display: none; }
  .ecosystem-chain { flex-direction: column; }
}

/* Дорожная карта */
.roadmap-block {
  padding: 1.5rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
}

.roadmap-timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.roadmap-item {
  padding: 1rem;
  background: var(--color-bg);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-primary);
}

.roadmap-status-plan { border-left-color: var(--color-primary); }
.roadmap-status-done { border-left-color: var(--color-success); }

.roadmap-period {
  display: block;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

.roadmap-desc {
  font-size: 0.875rem;
  color: var(--color-text);
  opacity: 0.9;
}

/* Соответствие требованиям */
.compliance-list {
  list-style: none;
  padding: 0;
  margin: 0;
  max-width: 36rem;
}

.compliance-list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.75rem;
}

.compliance-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-success);
  font-weight: 700;
  font-size: 1rem;
}

/* Футер */
.site-footer {
  background: var(--color-text);
  color: #fff;
  padding: 2.5rem 0;
}

.site-footer .text-muted,
.site-footer .footer-text {
  color: rgba(255, 255, 255, 0.85) !important;
}

.footer-brand {
  font-weight: 700;
  font-size: 1.1rem;
}

.footer-link {
  color: rgba(255, 255, 255, 0.9);
}

.footer-link:hover {
  color: #fff;
  text-decoration: underline;
}

.footer-hr {
  border-color: rgba(255, 255, 255, 0.2);
  margin: 1.5rem 0 1rem;
}

.site-footer .btn-outline-light {
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}

.site-footer .btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
  color: #fff;
}

/* Модальные окна */
.modal-content {
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.25);
}

.modal-header {
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 1.25rem;
}

.modal-body {
  padding: 1.25rem;
}

.modal-form .form-control {
  border-radius: var(--radius);
}

.modal-form .form-label {
  font-weight: 500;
}

/* Анимация появления секций (лёгкий fade-in при скролле) */
.section {
  opacity: 1;
}

@media (prefers-reduced-motion: no-preference) {
  .section.animate-in {
    animation: sectionFadeIn 0.3s ease-out;
  }
}

@keyframes sectionFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Фокус для доступности */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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