/* ========== Common design tokens and base components (site, landing, admin) ========== */

* { box-sizing: border-box; }

:root {
  --bg: #0d0d0d;
  --card: #1a1a1a;
  --card-elevated: #1f1f1f;
  --border: #2a2a2a;
  --border-hover: #3a3a3a;
  --orange: #ff6b00;
  --orange-hover: #ff8533;
  --orange-soft: rgba(255, 107, 0, 0.15);
  --orange-glow: rgba(255, 107, 0, 0.25);
  --card-shadow-glow: 0 8px 32px rgba(255, 107, 0, 0.08);
  --text: #f5f5f5;
  --text-muted: #a3a3a3;
  --tap: 44px;
  --section-gap: 1.75rem;
  --section-gap-lg: 2.25rem;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 0.75rem;
  --space-lg: 1rem;
  --space-xl: 1.5rem;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --card-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
  --card-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.4);
  --card-shadow-premium: 0 4px 20px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(255, 107, 0, 0.06);
  --orange-glow-soft: 0 0 24px rgba(255, 107, 0, 0.12);
  --font-heading: 'Manrope', system-ui, -apple-system, sans-serif;
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
}

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

body {
  font-family: 'Manrope', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.55;
  -webkit-tap-highlight-color: transparent;
  overflow-x: hidden;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--orange); }

a {
  color: var(--orange);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--orange-hover); }
a:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

/* ========== Site header (shared) ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 13, 13, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 rgba(0,0,0,0.1);
  transition: background var(--transition-base), backdrop-filter var(--transition-base);
}
.site-header.scrolled {
  background: rgba(13, 13, 13, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.site-header .header-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.site-header .header-logo {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
  transition: color 0.2s;
  font-family: var(--font-heading);
}
.site-header .header-logo .accent { color: var(--orange); }
.site-header .header-logo:hover { color: var(--text); }
.site-header .header-nav { display: flex; align-items: center; }
.site-header .header-nav-current { font-size: 0.9375rem; font-weight: 500; color: var(--text-muted); }
.site-header .header-actions { display: flex; align-items: center; gap: 1rem; }
.site-header .header-actions .btn-header {
  padding: 0.4rem 0.85rem;
  font-size: 0.875rem;
  min-height: 36px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
  line-height: 1.3;
  transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast);
}
.site-header .header-actions .btn-header:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}
.site-header .header-actions .btn-header:active { transform: scale(0.97); }
.site-header .header-actions .btn-header.secondary {
  background: transparent;
  color: var(--orange);
  border-color: var(--orange);
}
.site-header .header-actions .btn-header.secondary:hover { background: var(--orange-soft); }
.site-header .header-actions .btn-header.primary { background: var(--orange); color: var(--bg); }
.site-header .header-actions .btn-header.primary:hover {
  background: var(--orange-hover);
  color: var(--bg);
  box-shadow: 0 4px 16px rgba(255, 107, 0, 0.3);
}
.site-header .header-actions .header-actions-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 0.4rem 0;
  transition: color 0.2s;
}
.site-header .header-actions .header-actions-link:hover { color: var(--orange); }
.site-header .header-burger {
  display: none;
  width: var(--tap);
  height: var(--tap);
  padding: 0;
  border: none;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  border-radius: var(--radius-sm);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.site-header .header-burger:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}
.site-header .header-burger:hover { background: var(--orange-soft); color: var(--orange); }
.site-header .header-burger span {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}
.site-header .header-burger.nav-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header .header-burger.nav-open span:nth-child(2) { opacity: 0; }
.site-header .header-burger.nav-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ========== Wrap container ========== */
.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
  padding-left: max(1.25rem, env(safe-area-inset-left));
  padding-right: max(1.25rem, env(safe-area-inset-right));
  padding-bottom: max(2rem, env(safe-area-inset-bottom));
}

/* ========== Base buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.1rem;
  min-height: var(--tap);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.9375rem;
  border: none;
  background: var(--orange);
  color: var(--bg);
  font-weight: 600;
  font-family: inherit;
  line-height: 1.3;
  transition: background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}
.btn:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}
.btn:hover {
  background: var(--orange-hover);
  color: var(--bg);
  box-shadow: var(--orange-glow-soft);
}
.btn:active { transform: scale(0.98); }
.btn.secondary {
  background: transparent;
  color: var(--orange);
  border: 1px solid var(--orange);
}
.btn.secondary:hover {
  background: var(--orange-soft);
  box-shadow: 0 2px 8px rgba(255, 107, 0, 0.1);
}

/* Button size variants */
.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
  min-height: 32px;
  border-radius: 6px;
}
.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1.0625rem;
  min-height: 48px;
  border-radius: var(--radius-md);
}
.btn-block { width: 100%; }
.btn:disabled, .btn[disabled] { opacity: 0.5; cursor: not-allowed; pointer-events: none; }

/* ========== Base form focus ========== */
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
  border-color: var(--orange);
  box-shadow: 0 0 0 3px var(--orange-soft), 0 0 16px rgba(255, 107, 0, 0.08);
}

/* ========== Mobile header (shared) ========== */
@media (max-width: 768px) {
  .site-header .header-nav { display: none; }
  .site-header .header-actions {
    display: none;
    width: 100%;
    order: 3;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
    margin-top: 0.25rem;
  }
  .site-header .header-burger { display: flex; order: 2; }
  .site-header .header-logo { order: 1; }
  .site-header .header-inner { flex-wrap: wrap; max-width: 100%; }
  .site-header.nav-open .header-nav { display: flex; position: static; }
  .site-header.nav-open .header-actions { display: flex; flex-direction: column; gap: 0.5rem; position: static; }
  .site-header .header-actions .btn-header {
    width: 100%;
    min-height: var(--tap);
    padding: 0.65rem 1rem;
    font-size: 1rem;
    justify-content: center;
  }
  .site-header .header-actions .header-actions-link {
    display: block;
    padding: 0.65rem 1rem;
    min-height: var(--tap);
    text-align: center;
  }
}

/* ========== Scroll-to-top button ========== */
.scroll-top-btn {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 150;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--card);
  color: var(--orange);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s, background var(--transition-fast), border-color var(--transition-fast);
}
.scroll-top-btn.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.scroll-top-btn:hover { background: var(--orange); color: var(--bg); border-color: var(--orange); }

/* ========== Site footer ========== */
.site-footer {
  margin-top: var(--section-gap-lg);
  padding: 1.5rem 1rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
}
.site-footer-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}
.site-footer-logo {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.site-footer-logo .accent { color: var(--orange); }
.site-footer-logo:hover { color: var(--text); }
.site-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  justify-content: center;
}
.site-footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.8125rem;
  transition: color var(--transition-fast);
}
.site-footer-links a:hover { color: var(--orange); }
.site-footer-copy { font-size: 0.75rem; color: var(--text-muted); opacity: 0.7; }

/* ========== Reduced motion ========== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}