/* ============================================================
   OctoBuilder — Professional Telegram Bot Platform
   Modern dark SaaS design · 2026
   ============================================================ */

:root {
  --bg-deep: #07080c;
  --bg-primary: #0c0e14;
  --bg-card: #12151e;
  --bg-card-hover: #171b27;
  --bg-elevated: #1a1f2e;
  --border: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.12);
  --text-primary: #f1f3f7;
  --text-secondary: #9aa3b5;
  --text-muted: #6b7385;
  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.25);
  --accent-2: #22d3ee;
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --gradient-main: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #22d3ee 100%);
  --gradient-text: linear-gradient(135deg, #a5b4fc 0%, #c4b5fd 40%, #67e8f9 100%);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.5);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-display: 'Outfit', var(--font);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Background mesh */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(99, 102, 241, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(34, 211, 238, 0.08), transparent),
    radial-gradient(ellipse 50% 30% at 50% 100%, rgba(139, 92, 246, 0.06), transparent);
  pointer-events: none;
  z-index: 0;
}

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

img {
  max-width: 100%;
  display: block;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* Layout */
.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ========== HEADER ========== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px) saturate(180%);
  background: rgba(7, 8, 12, 0.75);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-main);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.logo span {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.nav a:hover,
.nav a.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-cta {
  margin-left: 8px;
  padding: 10px 20px !important;
  background: var(--gradient-main) !important;
  color: #fff !important;
  border-radius: 10px !important;
  font-weight: 600 !important;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--accent-glow);
}

.mobile-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.mobile-toggle svg {
  width: 24px;
  height: 24px;
}

/* ========== HERO ========== */
.hero {
  padding: 100px 0 80px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 8px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent-light);
  margin-bottom: 28px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.hero h1 .gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-lead {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-bottom: 56px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
  max-width: 700px;
  margin: 0 auto;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ========== SECTIONS ========== */
.section {
  padding: 80px 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-light);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ========== FEATURES GRID ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(99, 102, 241, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 18px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ========== HOW IT WORKS ========== */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  counter-reset: step;
}

.step {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  text-align: center;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin: 0 auto 20px;
  background: var(--gradient-main);
  border-radius: 50%;
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.step h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.step p {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* ========== TEMPLATES / BOTS ========== */
.bots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.bot-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.bot-card:hover {
  border-color: rgba(99, 102, 241, 0.35);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.bot-card-header {
  padding: 24px 24px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.bot-emoji {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.bot-card-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.bot-card-header span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.bot-card-body {
  padding: 0 24px 20px;
  flex: 1;
}

.bot-card-body p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.bot-card-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.bot-tag {
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-light);
  font-weight: 500;
}

.bot-card-footer a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-light);
}

.bot-card-footer a:hover {
  color: #fff;
}

/* ========== PRICING ========== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  position: relative;
  transition: all var(--transition);
}

.price-card.featured {
  border-color: rgba(99, 102, 241, 0.45);
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.08) 0%, var(--bg-card) 40%);
  box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.2), var(--shadow-md);
}

.price-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-main);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 100px;
  white-space: nowrap;
}

.price-card h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.price-amount {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 16px 0 4px;
}

.price-amount span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
}

.price-period {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.price-features {
  margin-bottom: 32px;
}

.price-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.price-features li::before {
  content: '✓';
  color: var(--success);
  font-weight: 700;
  flex-shrink: 0;
}

.price-card .btn {
  width: 100%;
}

/* ========== CTA BANNER ========== */
.cta-banner {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(34, 211, 238, 0.08) 100%);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 14px;
}

.cta-banner p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== CONTENT PAGES ========== */
.page-hero {
  padding: 72px 0 48px;
  text-align: center;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

.content-block {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 0 80px;
}

.content-block h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  margin: 40px 0 16px;
  letter-spacing: -0.01em;
}

.content-block h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 28px 0 12px;
}

.content-block p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 1.05rem;
  line-height: 1.75;
}

.content-block ul,
.content-block ol {
  margin: 16px 0 24px 0;
  padding-left: 0;
}

.content-block li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.65;
}

.content-block ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.content-block ol {
  counter-reset: item;
}

.content-block ol li {
  counter-increment: item;
}

.content-block ol li::before {
  content: counter(item) '.';
  position: absolute;
  left: 0;
  color: var(--accent-light);
  font-weight: 600;
}

.content-block a {
  color: var(--accent-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.content-block a:hover {
  color: #fff;
}

.highlight-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin: 28px 0;
}

.highlight-box p {
  margin: 0;
  color: var(--text-primary);
}

/* ========== CONTACT / SOCIAL ========== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: all var(--transition);
}

.contact-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
  transform: translateY(-2px);
}

.contact-card .icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
}

.contact-card h4 {
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.contact-card a {
  font-size: 0.9rem;
  color: var(--accent-light);
  font-weight: 500;
}

.contact-card a:hover {
  color: #fff;
}

/* ========== FOOTER ========== */
.footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
  position: relative;
  z-index: 1;
  background: rgba(0, 0, 0, 0.3);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 14px;
  max-width: 280px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 0.92rem;
  color: var(--text-secondary);
  padding: 5px 0;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--transition);
}

.footer-social a:hover {
  background: rgba(99, 102, 241, 0.2);
  color: var(--accent-light);
}

/* ========== 404 ========== */
.error-page {
  text-align: center;
  padding: 120px 0;
}

.error-page h1 {
  font-family: var(--font-display);
  font-size: 6rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 16px;
}

.error-page h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.error-page p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: 16px;
    gap: 4px;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    width: 100%;
    text-align: left;
    padding: 12px 16px;
  }

  .nav-cta {
    margin-left: 0 !important;
    text-align: center !important;
    margin-top: 8px;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero {
    padding: 64px 0 56px;
  }

  .hero-stats {
    gap: 28px;
  }

  .section {
    padding: 56px 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .cta-banner {
    padding: 40px 24px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }
}

/* Utilities */
.text-center { text-align: center; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }