/* ============================================
   TennisKRD Legal Website — Design System
   tennis-krd.ru
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Brand Colors */
  --brand-green: #34D399;
  --brand-green-dark: #059669;
  --brand-green-glow: rgba(52, 211, 153, 0.25);
  --brand-accent: #10B981;

  /* Backgrounds */
  --bg-primary: #0A0F1C;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.65);
  --bg-card-hover: rgba(17, 24, 39, 0.85);

  /* Text */
  --text-primary: #F9FAFB;
  --text-secondary: #9CA3AF;
  --text-muted: #6B7280;

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-card: rgba(255, 255, 255, 0.08);

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px var(--brand-green-glow);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --max-width: 780px;
  --page-padding: 24px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

/* ---------- Background Gradient ---------- */
body::before {
  content: '';
  position: fixed;
  top: -30%;
  left: -10%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, var(--brand-green-glow), transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: floatGlow 12s ease-in-out infinite alternate;
}

body::after {
  content: '';
  position: fixed;
  bottom: -20%;
  right: -15%;
  width: 50%;
  height: 50%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.1), transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: floatGlow 15s ease-in-out infinite alternate-reverse;
}

@keyframes floatGlow {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(40px, -30px) scale(1.1); }
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(10, 15, 28, 0.75);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px var(--page-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--brand-green), var(--brand-green-dark));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: var(--shadow-glow);
}

.header-nav {
  display: flex;
  gap: 6px;
}

.header-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

/* ---------- Page Container ---------- */
.page {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px var(--page-padding) 80px;
}

/* ---------- Hero Section ---------- */
.hero {
  text-align: center;
  padding: 64px 0 48px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.2);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--brand-green);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.1;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--brand-green), var(--brand-green-dark));
  color: var(--bg-primary);
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 100px;
  text-decoration: none;
  transition: all var(--transition-smooth);
  box-shadow: 0 4px 20px var(--brand-green-glow);
}

.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--brand-green-glow);
}

/* ---------- Link Cards (Home page) ---------- */
.link-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}

.link-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-smooth);
  box-shadow: var(--shadow-card);
}

.link-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(52, 211, 153, 0.2);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.link-card-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: rgba(52, 211, 153, 0.12);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.link-card-body {
  flex: 1;
}

.link-card-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.link-card-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.link-card-arrow {
  flex-shrink: 0;
  color: var(--text-muted);
  font-size: 1.2rem;
  transition: transform var(--transition-fast);
}

.link-card:hover .link-card-arrow {
  transform: translateX(4px);
  color: var(--brand-green);
}

/* ---------- Document Page ---------- */
.doc-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.doc-header h1 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.doc-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.doc-content {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.doc-content h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 40px;
  margin-bottom: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}

.doc-content h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 28px;
  margin-bottom: 12px;
}

.doc-content p {
  margin-bottom: 16px;
}

.doc-content ul,
.doc-content ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.doc-content li {
  margin-bottom: 8px;
}

.doc-content a {
  color: var(--brand-green);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.doc-content a:hover {
  color: var(--brand-accent);
  text-decoration: underline;
}

.doc-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ---------- Info Box (requisites etc.) ---------- */
.info-box {
  background: rgba(52, 211, 153, 0.06);
  border: 1px solid rgba(52, 211, 153, 0.15);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 24px 0;
}

.info-box-title {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--brand-green);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.info-box p {
  margin-bottom: 4px;
  font-size: 0.9rem;
}

/* ---------- Warning Box ---------- */
.warning-box {
  background: rgba(239, 68, 68, 0.06);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 24px 0;
}

.warning-box-title {
  font-weight: 700;
  font-size: 0.9rem;
  color: #EF4444;
  margin-bottom: 8px;
}

/* ---------- Delete Account Form ---------- */
.delete-form {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-top: 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  transition: border-color var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--brand-green);
  box-shadow: 0 0 0 3px var(--brand-green-glow);
}

.form-group textarea {
  min-height: 100px;
  resize: vertical;
}

.btn-danger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: linear-gradient(135deg, #EF4444, #DC2626);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  border: none;
  border-radius: 100px;
  cursor: pointer;
  transition: all var(--transition-smooth);
  box-shadow: 0 4px 20px rgba(239, 68, 68, 0.25);
}

.btn-danger:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(239, 68, 68, 0.35);
}

.btn-danger:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border-subtle);
  padding: 32px var(--page-padding);
  text-align: center;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-inner p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.footer-inner a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-inner a:hover {
  color: var(--brand-green);
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.6s var(--transition-smooth) forwards;
  opacity: 0;
}

.animate-in:nth-child(2) { animation-delay: 0.1s; }
.animate-in:nth-child(3) { animation-delay: 0.2s; }
.animate-in:nth-child(4) { animation-delay: 0.3s; }
.animate-in:nth-child(5) { animation-delay: 0.4s; }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  :root {
    --page-padding: 16px;
  }

  .header-nav a {
    font-size: 0.78rem;
    padding: 6px 8px;
  }

  .hero {
    padding: 40px 0 32px;
  }

  .link-card {
    padding: 16px 18px;
  }

  .delete-form {
    padding: 24px 20px;
  }
}