/* ============================================
   TUSK AI - Global Design System
   ============================================ */

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

/* ---- CSS Design Tokens ---- */
:root {
  --bg-primary: #0B0F15;
  --bg-secondary: #10141B;
  --bg-card: #131820;
  --bg-card-hover: #161D27;
  --bg-glass: rgba(16, 20, 27, 0.7);

  --accent: #10B981;
  --accent-light: #34D399;
  --accent-dark: #059669;
  --accent-glow: rgba(16, 185, 129, 0.15);
  --accent-glow-strong: rgba(16, 185, 129, 0.35);

  --text-primary: #FFFFFF;
  --text-secondary: #CBD5E1;
  --text-muted: #64748B;
  --text-faint: #334155;

  --border: rgba(255,255,255,0.06);
  --border-accent: rgba(16,185,129,0.3);

  --red: #EF4444;
  --amber: #F59E0B;
  --purple: #8B5CF6;
  --blue: #3B82F6;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-card: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-accent: 0 0 30px rgba(16,185,129,0.2);

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; outline: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; outline: none; }

/* ---- Typography ---- */
h1 { font-size: clamp(2.2rem, 5vw, 4rem); font-weight: 800; line-height: 1.1; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.8rem); font-weight: 700; line-height: 1.2; }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 600; }
p { color: var(--text-secondary); }

.text-accent { color: var(--accent); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }

/* ---- Layout ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 5rem 0; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-1 { gap: 0.5rem; } .gap-2 { gap: 1rem; } .gap-3 { gap: 1.5rem; } .gap-4 { gap: 2rem; }

/* ---- Navbar ---- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 0 1.5rem;
  height: 70px;
  display: flex; align-items: center;
  background: rgba(11, 15, 21, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(11, 15, 21, 0.97);
  box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.nav-inner { max-width: 1200px; width: 100%; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 0.6rem; font-size: 1.3rem; font-weight: 800; }
.nav-logo .logo-icon {
  width: 36px; height: 36px; background: var(--accent); border-radius: 8px;
  display: flex; align-items: center; justify-content: center; font-size: 1rem;
}
.nav-links { display: flex; align-items: center; gap: 0.25rem; }
.nav-links a {
  padding: 0.4rem 0.8rem; font-size: 0.875rem; font-weight: 500; color: var(--text-secondary);
  border-radius: 6px; transition: var(--transition);
}
.nav-links a:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.nav-links a.active { color: var(--accent); }
.nav-actions { display: flex; align-items: center; gap: 0.75rem; }
.nav-hamburger { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.nav-hamburger span { display: block; width: 22px; height: 2px; background: var(--text-secondary); border-radius: 2px; transition: var(--transition); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.6rem 1.4rem; border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 600; transition: var(--transition);
}
.btn-primary {
  background: var(--accent); color: #000;
}
.btn-primary:hover { background: var(--accent-light); transform: translateY(-1px); box-shadow: 0 4px 20px rgba(16,185,129,0.4); }
.btn-outline {
  border: 1.5px solid var(--border-accent); color: var(--accent); background: transparent;
}
.btn-outline:hover { background: var(--accent-glow); }
.btn-ghost { color: var(--text-secondary); background: rgba(255,255,255,0.05); }
.btn-ghost:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); }
.btn-lg { padding: 0.85rem 2rem; font-size: 1rem; border-radius: var(--radius-md); }
.btn-sm { padding: 0.4rem 1rem; font-size: 0.8rem; }

/* ---- Cards ---- */
.card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 1.5rem; transition: var(--transition);
}
.card:hover { border-color: var(--border-accent); box-shadow: var(--shadow-accent); transform: translateY(-3px); }
.card-glass {
  background: var(--bg-glass); backdrop-filter: blur(20px); border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

/* ---- Badges / Pills ---- */
.badge {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.25rem 0.75rem; border-radius: 999px;
  font-size: 0.75rem; font-weight: 600;
}
.badge-green { background: rgba(16,185,129,0.15); color: var(--accent); border: 1px solid rgba(16,185,129,0.3); }
.badge-purple { background: rgba(139,92,246,0.15); color: #A78BFA; border: 1px solid rgba(139,92,246,0.3); }
.badge-amber { background: rgba(245,158,11,0.15); color: #FCD34D; border: 1px solid rgba(245,158,11,0.3); }
.badge-red { background: rgba(239,68,68,0.15); color: #FCA5A5; border: 1px solid rgba(239,68,68,0.3); }
.badge-blue { background: rgba(59,130,246,0.15); color: #93C5FD; border: 1px solid rgba(59,130,246,0.3); }

/* ---- Section Headers ---- */
.section-header { text-align: center; margin-bottom: 3rem; }
.section-label {
  display: inline-block; padding: 0.3rem 1rem; background: var(--accent-glow);
  color: var(--accent); border: 1px solid var(--border-accent); border-radius: 999px;
  font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 1rem;
}
.section-title { margin-bottom: 1rem; }
.section-desc { color: var(--text-muted); max-width: 600px; margin: 0 auto; font-size: 1.05rem; }

/* ---- Pulse Animation ---- */
@keyframes pulse-ring {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(2.5); opacity: 0; }
}
.pulse-dot {
  position: relative; width: 10px; height: 10px;
  background: var(--accent); border-radius: 50%; display: inline-block;
}
.pulse-dot::after {
  content: ''; position: absolute; inset: 0;
  background: var(--accent); border-radius: 50%;
  animation: pulse-ring 1.5s ease-out infinite;
}

/* ---- Counter Animation ---- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { opacity: 0; animation: fadeInUp 0.7s ease forwards; }
.fade-in-1 { animation-delay: 0.1s; }
.fade-in-2 { animation-delay: 0.2s; }
.fade-in-3 { animation-delay: 0.3s; }
.fade-in-4 { animation-delay: 0.4s; }

/* ---- Gradient Text ---- */
.gradient-text {
  background: linear-gradient(135deg, #10B981, #34D399, #6EE7B7);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

/* ---- Divider ---- */
.divider { height: 1px; background: var(--border); margin: 2rem 0; }

/* ---- Forms ---- */
.form-group { margin-bottom: 1.25rem; }
.form-label { display: block; font-size: 0.85rem; font-weight: 500; color: var(--text-secondary); margin-bottom: 0.5rem; }
.form-input {
  width: 100%; padding: 0.75rem 1rem; background: var(--bg-secondary);
  border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text-primary);
  font-size: 0.9rem; transition: var(--transition);
}
.form-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.form-input::placeholder { color: var(--text-muted); }
select.form-input option { background: var(--bg-secondary); }
textarea.form-input { resize: vertical; min-height: 120px; }

/* ---- Footer ---- */
.footer { background: #070A0F; border-top: 1px solid var(--border); padding: 4rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 2rem; margin-bottom: 3rem; }
.footer-brand p { color: var(--text-muted); margin: 1rem 0; font-size: 0.9rem; max-width: 260px; }
.footer-social { display: flex; gap: 0.75rem; margin-top: 1rem; }
.footer-social a {
  width: 36px; height: 36px; border-radius: 8px; background: var(--bg-card);
  border: 1px solid var(--border); display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; color: var(--text-muted); transition: var(--transition);
}
.footer-social a:hover { border-color: var(--border-accent); color: var(--accent); }
.footer-col h5 { font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 1.25rem; }
.footer-col ul li { margin-bottom: 0.6rem; }
.footer-col ul li a { color: var(--text-secondary); font-size: 0.9rem; transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; padding-top: 2rem; border-top: 1px solid var(--border); }
.footer-bottom p { color: var(--text-muted); font-size: 0.85rem; }

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: #1E2A38; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-dark); }

/* ---- Page Hero ---- */
.page-hero {
  padding: 8rem 0 4rem; text-align: center;
  background: radial-gradient(ellipse at 50% 0%, rgba(16,185,129,0.08) 0%, transparent 70%);
}
.page-hero h1 { margin-bottom: 1rem; }
.page-hero p { font-size: 1.1rem; color: var(--text-muted); max-width: 600px; margin: 0 auto 2rem; }

/* ---- Mobile menu ---- */
.mobile-menu {
  display: none; position: fixed; top: 70px; left: 0; right: 0;
  background: rgba(10,14,20,0.98); backdrop-filter: blur(20px);
  padding: 1.5rem; z-index: 999; border-bottom: 1px solid var(--border);
  flex-direction: column; gap: 0.5rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a { padding: 0.75rem 1rem; border-radius: 8px; color: var(--text-secondary); font-weight: 500; transition: var(--transition); }
.mobile-menu a:hover { background: rgba(255,255,255,0.05); color: var(--text-primary); }

/* ---- Stat Cards ---- */
.stat-card { text-align: center; }
.stat-card .stat-num { font-size: 2.5rem; font-weight: 800; color: var(--accent); line-height: 1; }
.stat-card .stat-label { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.25rem; }

/* ---- Code Blocks ---- */
pre, code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  font-size: 0.875rem;
}
.code-block {
  background: #0D1117; border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 1.5rem; overflow-x: auto;
}
.code-block code { color: #E6EDF3; line-height: 1.7; }
.code-keyword { color: #FF7B72; }
.code-string { color: #A5D6FF; }
.code-comment { color: #8B949E; }
.code-func { color: #D2A8FF; }
.code-num { color: #79C0FF; }
.code-key { color: #7EE787; }

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-links, .nav-actions .btn-outline { display: none; }
  .nav-hamburger { display: flex; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
  .section { padding: 3rem 0; }
}

/* ── User Session Avatar & Dropdown ── */
.user-menu-wrap { position: relative; }

.user-avatar-btn {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.35rem 0.75rem 0.35rem 0.35rem;
  background: var(--accent-glow); border: 1.5px solid var(--border-accent);
  border-radius: 999px; cursor: pointer; transition: var(--transition);
  color: var(--text-primary); font-size: 0.85rem; font-weight: 600;
}
.user-avatar-btn:hover { background: rgba(16,185,129,0.25); }

.user-avatar-icon {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent); color: #000;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.72rem; font-weight: 800; flex-shrink: 0;
}
.user-avatar-icon.lg { width: 40px; height: 40px; font-size: 1rem; }
.user-name-label { max-width: 100px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.user-dropdown {
  display: none; position: absolute; right: 0; top: calc(100% + 8px);
  min-width: 220px; background: var(--bg-card);
  border: 1px solid var(--border-accent); border-radius: var(--radius-md);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5); z-index: 2000;
  overflow: hidden; animation: dropdownFade 0.15s ease;
}
.user-dropdown.open { display: block; }
@keyframes dropdownFade { from { opacity:0; transform:translateY(-6px); } to { opacity:1; transform:translateY(0); } }

.user-dropdown-header {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 1rem 1rem 0.75rem;
}
.user-dropdown-name { font-weight: 700; font-size: 0.9rem; color: var(--text-primary); }
.user-dropdown-role { font-size: 0.72rem; color: var(--accent); margin-top: 0.1rem; }

.user-dropdown-divider { height: 1px; background: var(--border); margin: 0.25rem 0; }

.user-dropdown-item {
  display: flex; align-items: center; gap: 0.6rem;
  width: 100%; padding: 0.65rem 1rem;
  font-size: 0.85rem; color: var(--text-secondary);
  background: none; border: none; text-align: left; cursor: pointer;
  transition: var(--transition-fast); font-family: inherit;
}
.user-dropdown-item:hover { background: rgba(255,255,255,0.05); color: var(--text-primary); }
.logout-btn { color: #FCA5A5; }
.logout-btn:hover { background: rgba(239,68,68,0.08); color: #EF4444; }