/* ============================================================
   AI TOOLS HUB — Master Stylesheet
   Dark/Light Mode | Glassmorphism | Animations
   ============================================================ */

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #161627;
  --bg-card: #1e1e35;
  --bg-card-hover: #252542;
  --border: rgba(255,255,255,0.08);
  --border-active: rgba(99,102,241,0.5);
  --text-primary: #f0f0ff;
  --text-secondary: #9a9ac0;
  --text-muted: #5a5a7a;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99,102,241,0.3);
  --green: #22c55e;
  --blue: #3b82f6;
  --purple: #8b5cf6;
  --amber: #f59e0b;
  --pink: #ec4899;
  --teal: #14b8a6;
  --glass: rgba(30,30,53,0.7);
  --glass-border: rgba(255,255,255,0.1);
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(99,102,241,0.2);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --sidebar-w: 260px;
  --header-h: 64px;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

[data-theme="light"] {
  --bg-primary: #f8f9ff;
  --bg-secondary: #eef0ff;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f2ff;
  --border: rgba(0,0,0,0.08);
  --border-active: rgba(99,102,241,0.4);
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #8a8aaa;
  --glass: rgba(255,255,255,0.8);
  --glass-border: rgba(255,255,255,0.9);
  --shadow: 0 8px 32px rgba(0,0,0,0.1);
  --shadow-glow: 0 0 40px rgba(99,102,241,0.15);
}

/* ── Reset & Base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; }
button { cursor: pointer; border: none; outline: none; font-family: inherit; }
input, select, textarea { font-family: inherit; }
ul { list-style: none; }
h1,h2,h3,h4,h5,h6 { font-weight: 700; line-height: 1.3; }

/* ── App Layout ────────────────────────────────────────────── */
.app { display: flex; min-height: 100vh; }

/* ── Sidebar ───────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  position: fixed; left: 0; top: 0; bottom: 0;
  display: flex; flex-direction: column;
  z-index: 100;
  transition: transform var(--transition), background var(--transition);
  overflow-y: auto;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.sidebar-logo {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.logo-text {
  font-size: 1.2rem; font-weight: 800;
  background: linear-gradient(135deg, #6366f1, #8b5cf6, #ec4899);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.logo-sub { font-size: 0.7rem; color: var(--text-muted); margin-top: 2px; }

.sidebar-nav { flex: 1; padding: 12px 0; }
.nav-section-title {
  font-size: 0.65rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--text-muted);
  padding: 12px 20px 6px;
}
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 20px; color: var(--text-secondary);
  font-size: 0.875rem; font-weight: 500;
  cursor: pointer; border-radius: 0;
  transition: all var(--transition);
  border-left: 3px solid transparent;
  position: relative;
}
.nav-item:hover { background: var(--bg-card); color: var(--text-primary); border-left-color: var(--accent); }
.nav-item.active { background: var(--accent-glow); color: var(--accent-hover); border-left-color: var(--accent); font-weight: 600; }
.nav-item .nav-icon { font-size: 1.1rem; width: 20px; text-align: center; }
.nav-badge {
  margin-left: auto; font-size: 0.6rem; font-weight: 700;
  background: var(--accent); color: white;
  padding: 2px 6px; border-radius: 20px;
}

.sidebar-footer { padding: 16px 20px; border-top: 1px solid var(--border); flex-shrink: 0; }
.theme-toggle {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 14px;
  cursor: pointer; width: 100%;
  color: var(--text-secondary); font-size: 0.8rem; font-weight: 500;
  transition: all var(--transition);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--text-primary); }

/* ── Main Content ──────────────────────────────────────────── */
.main {
  flex: 1;
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  transition: margin var(--transition);
}

/* ── Header ─────────────────────────────────────────────────── */
.header {
  height: var(--header-h);
  background: var(--glass);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: sticky; top: 0; z-index: 90;
  display: flex; align-items: center;
  padding: 0 24px; gap: 16px;
}
.hamburger {
  display: none; background: none; border: none;
  color: var(--text-primary); font-size: 1.4rem;
  padding: 4px; cursor: pointer;
}
.header-search {
  flex: 1; max-width: 500px;
  display: flex; align-items: center; gap: 10px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 8px 14px;
  transition: border-color var(--transition);
}
.header-search:focus-within { border-color: var(--accent); }
.header-search input {
  background: none; border: none; outline: none;
  color: var(--text-primary); font-size: 0.875rem; flex: 1;
}
.header-search input::placeholder { color: var(--text-muted); }
.search-icon { color: var(--text-muted); font-size: 0.9rem; }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.header-stat {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.8rem; color: var(--text-secondary);
  background: var(--bg-card); border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 20px;
}
.stat-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.6;transform:scale(1.3)} }

/* ── Page Container ────────────────────────────────────────── */
.page { display: none; padding: 28px 24px; }
.page.active { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from{opacity:0;transform:translateY(12px)} to{opacity:1;transform:translateY(0)} }
.page-header { margin-bottom: 28px; }
.page-title { font-size: 1.9rem; font-weight: 800; margin-bottom: 6px; }
.page-subtitle { color: var(--text-secondary); font-size: 1rem; }
.gradient-text {
  background: linear-gradient(135deg, #6366f1, #8b5cf6, #ec4899);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

/* ── Hero Section ──────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 52px 44px;
  margin-bottom: 32px;
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(99,102,241,0.15), transparent 60%),
              radial-gradient(ellipse at 20% 80%, rgba(236,72,153,0.1), transparent 50%);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 1; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent-glow); border: 1px solid var(--accent);
  padding: 5px 14px; border-radius: 20px;
  font-size: 0.75rem; font-weight: 700;
  color: var(--accent-hover); text-transform: uppercase; letter-spacing: 0.08em;
  margin-bottom: 20px;
}
.hero h1 { font-size: 2.8rem; font-weight: 900; line-height: 1.15; margin-bottom: 16px; }
.hero p { font-size: 1.05rem; color: var(--text-secondary); max-width: 600px; margin-bottom: 28px; line-height: 1.7; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 600;
  transition: all var(--transition); cursor: pointer;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--purple));
  color: white; border: none;
  box-shadow: 0 4px 20px rgba(99,102,241,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(99,102,241,0.5); color: white; }
.btn-secondary {
  background: var(--bg-card); color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent); background: var(--bg-card-hover); color: var(--text-primary); }

/* ── Stats Grid ────────────────────────────────────────────── */
.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px; margin-bottom: 32px;
}
.stat-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  text-align: center; transition: all var(--transition);
}
.stat-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow-glow); }
.stat-number { font-size: 2rem; font-weight: 900; margin-bottom: 4px; }
.stat-label { font-size: 0.78rem; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: 0.06em; }

/* ── Category Filter ───────────────────────────────────────── */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-bottom: 24px; align-items: center;
}
.filter-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 18px; border-radius: 25px;
  font-size: 0.82rem; font-weight: 600;
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-secondary); cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--accent); color: var(--text-primary); }
.filter-btn.active {
  background: linear-gradient(135deg, var(--accent), var(--purple));
  border-color: transparent; color: white;
  box-shadow: 0 4px 15px rgba(99,102,241,0.4);
}
.filter-count {
  font-size: 0.7rem; background: rgba(255,255,255,0.2);
  padding: 1px 6px; border-radius: 10px;
}
.filter-btn.active .filter-count { background: rgba(255,255,255,0.3); }

/* ── Tools Grid ─────────────────────────────────────────────── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  cursor: pointer;
  transition: all var(--transition);
  position: relative; overflow: hidden;
  display: flex; flex-direction: column; gap: 14px;
}
.tool-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--purple));
  opacity: 0; transition: opacity var(--transition);
}
.tool-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow-glow); background: var(--bg-card-hover); }
.tool-card:hover::before { opacity: 1; }

.tool-card-header { display: flex; align-items: flex-start; gap: 12px; }
.tool-icon-wrap {
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--accent-glow); border: 1px solid var(--border-active);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; flex-shrink: 0;
}
.tool-meta { flex: 1; min-width: 0; }
.tool-name { font-size: 1rem; font-weight: 700; margin-bottom: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tool-category-tag {
  font-size: 0.68rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--accent-hover);
}
.tool-badge {
  font-size: 0.65rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  color: white; padding: 3px 9px; border-radius: 12px;
  white-space: nowrap; flex-shrink: 0;
}

.tool-tagline { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.5; }

.tool-card-footer { display: flex; align-items: center; justify-content: space-between; margin-top: auto; }
.tool-rating { display: flex; align-items: center; gap: 4px; font-size: 0.8rem; }
.tool-rating .stars { color: var(--amber); }
.tool-rating .rating-val { font-weight: 700; }
.tool-rating .rating-users { color: var(--text-muted); font-size: 0.72rem; }
.tool-pricing {
  font-size: 0.75rem; font-weight: 600;
  background: var(--bg-secondary); border: 1px solid var(--border);
  padding: 3px 10px; border-radius: 8px; color: var(--text-secondary);
}

/* ── Tool Detail Page ──────────────────────────────────────── */
.tool-detail-header {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px;
  margin-bottom: 24px; position: relative; overflow: hidden;
}
.tool-detail-header::before {
  content: ''; position: absolute; top: 0; right: 0;
  width: 300px; height: 300px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  pointer-events: none;
}
.detail-back-btn {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--text-secondary); font-size: 0.85rem;
  background: var(--bg-secondary); border: 1px solid var(--border);
  padding: 7px 14px; border-radius: var(--radius-sm);
  cursor: pointer; margin-bottom: 20px;
  transition: all var(--transition);
}
.detail-back-btn:hover { border-color: var(--accent); color: var(--text-primary); }

.detail-hero-grid { display: grid; grid-template-columns: auto 1fr; gap: 20px; align-items: start; }
.detail-icon-big {
  width: 72px; height: 72px; border-radius: 18px;
  background: var(--accent-glow); border: 1px solid var(--border-active);
  display: flex; align-items: center; justify-content: center; font-size: 2.2rem;
}
.detail-title { font-size: 1.8rem; font-weight: 900; margin-bottom: 6px; }
.detail-tagline { color: var(--text-secondary); font-size: 1rem; margin-bottom: 16px; }
.detail-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  font-size: 0.75rem; font-weight: 600;
  padding: 5px 12px; border-radius: 20px;
  border: 1px solid var(--border);
}
.pill-rating { background: rgba(245,158,11,0.15); border-color: rgba(245,158,11,0.3); color: var(--amber); }
.pill-users { background: rgba(99,102,241,0.15); border-color: rgba(99,102,241,0.3); color: var(--accent-hover); }
.pill-price { background: rgba(34,197,94,0.15); border-color: rgba(34,197,94,0.3); color: var(--green); }
.pill-badge { background: linear-gradient(135deg,var(--accent),var(--purple)); border-color: transparent; color: white; }

.detail-content-grid {
  display: grid; grid-template-columns: 1fr 340px;
  gap: 24px; margin-bottom: 24px;
}
.detail-description {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
}
.detail-description p { color: var(--text-secondary); line-height: 1.8; font-size: 0.95rem; }
.section-title { font-size: 1rem; font-weight: 700; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }

.detail-sidebar-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; margin-bottom: 16px;
}
.feature-list { display: flex; flex-direction: column; gap: 8px; }
.feature-item {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.83rem; color: var(--text-secondary);
}
.feature-item::before { content: '✓'; color: var(--green); font-weight: 700; flex-shrink: 0; }

.pros-cons-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 24px; }
.pros-card { background: rgba(34,197,94,0.08); border: 1px solid rgba(34,197,94,0.2); border-radius: var(--radius); padding: 18px; }
.cons-card { background: rgba(239,68,68,0.08); border: 1px solid rgba(239,68,68,0.2); border-radius: var(--radius); padding: 18px; }
.pros-title { color: var(--green); font-weight: 700; margin-bottom: 10px; font-size: 0.9rem; }
.cons-title { color: #ef4444; font-weight: 700; margin-bottom: 10px; font-size: 0.9rem; }
.pc-item { font-size: 0.82rem; color: var(--text-secondary); padding: 4px 0; display: flex; align-items: center; gap: 6px; }
.pc-item::before { flex-shrink: 0; font-weight: 700; }
.pros-card .pc-item::before { content: '✓'; color: var(--green); }
.cons-card .pc-item::before { content: '✗'; color: #ef4444; }

/* ── Roadmap Page ──────────────────────────────────────────── */
.roadmap-cards {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px; margin-bottom: 32px;
}
.roadmap-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  cursor: pointer; transition: all var(--transition);
}
.roadmap-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow-glow); }
.roadmap-card-icon { font-size: 2.2rem; margin-bottom: 12px; }
.roadmap-card-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; }
.roadmap-card-meta { font-size: 0.8rem; color: var(--text-muted); display: flex; gap: 12px; flex-wrap: wrap; }
.roadmap-card-salary { font-size: 0.82rem; color: var(--green); font-weight: 600; margin-top: 8px; }
.roadmap-card-roles { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.role-tag {
  font-size: 0.68rem; background: var(--accent-glow);
  border: 1px solid var(--border-active); color: var(--accent-hover);
  padding: 3px 9px; border-radius: 10px; font-weight: 600;
}

.roadmap-detail { display: none; }
.roadmap-detail.active { animation: fadeIn 0.3s ease; }
.stages-timeline { position: relative; margin-top: 24px; }
.stage-item {
  display: grid; grid-template-columns: 140px 1fr;
  gap: 24px; margin-bottom: 32px; position: relative;
}
.stage-item::before {
  content: ''; position: absolute; left: 120px; top: 30px; bottom: -32px;
  width: 2px; background: var(--border);
}
.stage-item:last-child::before { display: none; }
.stage-left { text-align: right; padding-top: 4px; }
.stage-level {
  font-size: 0.75rem; font-weight: 800; text-transform: uppercase;
  letter-spacing: 0.08em; margin-bottom: 4px;
}
.stage-duration { font-size: 0.72rem; color: var(--text-muted); }
.stage-dot {
  position: absolute; left: 113px; top: 8px;
  width: 14px; height: 14px; border-radius: 50%;
  border: 3px solid var(--bg-primary);
}
.stage-content {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  border-left: 3px solid;
}
.stage-section { margin-bottom: 14px; }
.stage-section-title { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); margin-bottom: 8px; }
.topic-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.topic-tag {
  font-size: 0.72rem; background: var(--bg-secondary);
  border: 1px solid var(--border); color: var(--text-secondary);
  padding: 3px 9px; border-radius: 8px;
}
.project-box {
  background: var(--accent-glow); border: 1px solid var(--border-active);
  border-radius: var(--radius-sm); padding: 10px 14px;
  font-size: 0.82rem; color: var(--accent-hover);
}

/* ── Programming Paths Page ────────────────────────────────── */
.path-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  margin-bottom: 24px; overflow: hidden;
}
.path-header { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
.path-icon { font-size: 2rem; }
.path-title { font-size: 1.2rem; font-weight: 800; margin-bottom: 4px; }
.path-meta { font-size: 0.8rem; color: var(--text-muted); display: flex; gap: 16px; }
.path-salary { font-size: 0.82rem; color: var(--green); font-weight: 600; }

.path-timeline { display: flex; gap: 0; overflow-x: auto; padding-bottom: 8px; }
.path-timeline::-webkit-scrollbar { height: 4px; }
.path-timeline::-webkit-scrollbar-track { background: transparent; }
.path-timeline::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
.path-step { flex: 1; min-width: 190px; position: relative; }
.path-step::after {
  content: '→'; position: absolute; right: -12px; top: 22px;
  color: var(--text-muted); font-size: 1.1rem; z-index: 1;
}
.path-step:last-child::after { display: none; }
.step-header {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px 8px;
}
.step-dot { width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.7rem; font-weight: 800; color: white; flex-shrink: 0; }
.step-info { flex: 1; }
.step-month { font-size: 0.65rem; color: var(--text-muted); font-weight: 600; }
.step-title { font-size: 0.85rem; font-weight: 700; }
.step-body { padding: 8px 16px 16px; }
.step-topics { display: flex; flex-direction: column; gap: 4px; margin-bottom: 10px; }
.step-topic { font-size: 0.72rem; color: var(--text-secondary); display: flex; align-items: center; gap: 6px; }
.step-topic::before { content: '•'; color: var(--accent); }
.step-tools-wrap { display: flex; flex-wrap: wrap; gap: 4px; }
.step-tool {
  font-size: 0.65rem; background: var(--accent-glow);
  border: 1px solid var(--border-active); color: var(--accent-hover);
  padding: 2px 7px; border-radius: 6px; font-weight: 600;
}

/* ── Branch Roadmaps Page ──────────────────────────────────── */
.branch-tabs { display: flex; gap: 12px; margin-bottom: 28px; flex-wrap: wrap; }
.branch-tab {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-sm);
  background: var(--bg-card); border: 2px solid var(--border);
  cursor: pointer; font-size: 0.875rem; font-weight: 600;
  color: var(--text-secondary); transition: all var(--transition);
}
.branch-tab:hover { border-color: var(--accent); color: var(--text-primary); }
.branch-tab.active { border-color: var(--accent); color: var(--accent-hover); background: var(--accent-glow); }
.branch-tab .tab-icon { font-size: 1.2rem; }

.branch-content { display: none; animation: fadeIn 0.3s ease; }
.branch-content.active { display: block; }
.branch-overview {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; margin-bottom: 24px;
  border-left: 4px solid;
}
.branch-overview h3 { font-size: 1.3rem; font-weight: 800; margin-bottom: 8px; }
.branch-overview p { color: var(--text-secondary); line-height: 1.7; margin-bottom: 10px; }
.branch-salary { font-weight: 700; }

.branch-paths-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; margin-bottom: 24px; }
.branch-path-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
}
.branch-path-title { font-size: 0.9rem; font-weight: 700; margin-bottom: 12px; }
.branch-path-items { display: flex; flex-direction: column; gap: 6px; }
.branch-path-item { font-size: 0.8rem; color: var(--text-secondary); display: flex; align-items: flex-start; gap: 8px; }
.branch-path-item::before { content: '▸'; color: var(--accent); font-size: 0.7rem; margin-top: 2px; flex-shrink: 0; }

.jobs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; margin-bottom: 24px; }
.job-card {
  background: rgba(99,102,241,0.08); border: 1px solid rgba(99,102,241,0.2);
  border-radius: var(--radius-sm); padding: 14px 16px;
  font-size: 0.85rem; font-weight: 600; color: var(--accent-hover);
  text-align: center;
}
.companies-row { display: flex; flex-wrap: wrap; gap: 10px; }
.company-chip {
  background: var(--bg-card); border: 1px solid var(--border);
  padding: 6px 14px; border-radius: 20px;
  font-size: 0.8rem; font-weight: 600; color: var(--text-secondary);
  transition: all var(--transition);
}
.company-chip:hover { border-color: var(--accent); color: var(--text-primary); }

/* ── About Page ────────────────────────────────────────────── */
.about-hero {
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-primary));
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 48px; margin-bottom: 28px; text-align: center; position: relative; overflow: hidden;
}
.about-hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(99,102,241,0.15), transparent 60%);
  pointer-events: none;
}
.about-hero h2 { font-size: 2rem; font-weight: 900; margin-bottom: 12px; position: relative; }
.about-hero p { color: var(--text-secondary); max-width: 580px; margin: 0 auto; line-height: 1.8; position: relative; }

.team-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; margin-bottom: 28px; }
.team-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; text-align: center;
  transition: all var(--transition);
}
.team-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.team-avatar { font-size: 3rem; margin-bottom: 12px; }
.team-name { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.team-role { font-size: 0.8rem; color: var(--accent-hover); font-weight: 600; margin-bottom: 8px; }
.team-bio { font-size: 0.78rem; color: var(--text-muted); line-height: 1.6; }

.mission-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; margin-bottom: 28px; }
.mission-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
}
.mission-icon { font-size: 1.8rem; margin-bottom: 10px; }
.mission-title { font-size: 0.9rem; font-weight: 700; margin-bottom: 6px; }
.mission-desc { font-size: 0.78rem; color: var(--text-muted); line-height: 1.6; }

/* ── Future Page ───────────────────────────────────────────── */
.future-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.future-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  transition: all var(--transition); position: relative; overflow: hidden;
}
.future-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow-glow); }
.future-card::before {
  content: ''; position: absolute; top: 0; right: 0;
  width: 80px; height: 80px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  pointer-events: none;
}
.future-icon { font-size: 2rem; margin-bottom: 12px; }
.future-title { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.future-desc { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 14px; }
.future-status {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.72rem; font-weight: 700; padding: 4px 10px; border-radius: 12px;
}
.status-design { background: rgba(59,130,246,0.15); color: var(--blue); border: 1px solid rgba(59,130,246,0.3); }
.status-planned { background: rgba(34,197,94,0.15); color: var(--green); border: 1px solid rgba(34,197,94,0.3); }
.status-research { background: rgba(245,158,11,0.15); color: var(--amber); border: 1px solid rgba(245,158,11,0.3); }
.future-quarter { font-size: 0.7rem; color: var(--text-muted); margin-top: 6px; }

/* ── Empty State ───────────────────────────────────────────── */
.empty-state {
  text-align: center; padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 3rem; margin-bottom: 14px; opacity: 0.5; }
.empty-state h3 { font-size: 1.1rem; margin-bottom: 6px; color: var(--text-secondary); }
.empty-state p { font-size: 0.85rem; }

/* ── Toast notification ────────────────────────────────────── */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px 20px;
  font-size: 0.875rem; color: var(--text-primary);
  box-shadow: var(--shadow); z-index: 9999;
  transform: translateX(120%); transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1);
  display: flex; align-items: center; gap: 10px; max-width: 300px;
}
.toast.show { transform: translateX(0); }
.toast-icon { font-size: 1.1rem; }

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .detail-content-grid { grid-template-columns: 1fr; }
  .path-timeline { flex-direction: column; }
  .path-step::after { display: none; }
  .path-step { min-width: unset; }
}
@media (max-width: 768px) {
  :root { --sidebar-w: 0px; }
  .sidebar { transform: translateX(-260px); width: 260px; }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  .hamburger { display: flex; }
  .header-stat { display: none; }
  .hero { padding: 32px 24px; }
  .hero h1 { font-size: 1.9rem; }
  .detail-hero-grid { grid-template-columns: 1fr; }
  .pros-cons-grid { grid-template-columns: 1fr; }
  .stage-item { grid-template-columns: 1fr; gap: 8px; }
  .stage-item::before { display: none; }
  .stage-dot { display: none; }
  .stage-left { text-align: left; }
}
@media (max-width: 480px) {
  .page { padding: 20px 16px; }
  .tools-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
}

/* ── Animations ────────────────────────────────────────────── */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.loading-skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-hover) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

/* ── Sidebar Overlay ───────────────────────────────────────── */
.sidebar-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.5); z-index: 99;
  backdrop-filter: blur(4px);
}
@media (max-width: 768px) {
  .sidebar-overlay.show { display: block; }
}

/* ── Featured Tools Section ────────────────────────────────── */
.section-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px;
}
.section-header h2 { font-size: 1.3rem; font-weight: 800; }
.see-all-btn {
  font-size: 0.82rem; color: var(--accent-hover); font-weight: 600;
  background: none; border: none; cursor: pointer;
  transition: color var(--transition);
}
.see-all-btn:hover { color: var(--purple); }

/* ── Use Case & Features tags ──────────────────────────────── */
.use-case-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.use-case-tag {
  font-size: 0.75rem; background: var(--bg-secondary);
  border: 1px solid var(--border); color: var(--text-secondary);
  padding: 5px 12px; border-radius: 20px;
}

/* ── Job Roles ─────────────────────────────────────────────── */
.job-roles-row { display: flex; flex-wrap: wrap; gap: 8px; }
.job-role-chip {
  font-size: 0.75rem; font-weight: 600;
  background: rgba(99,102,241,0.12); border: 1px solid rgba(99,102,241,0.25);
  color: var(--accent-hover); padding: 5px 12px; border-radius: 20px;
}

/* ── Visit Tool Button ─────────────────────────────────────── */
.visit-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  color: white; padding: 12px 24px; border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 700; text-decoration: none;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(99,102,241,0.4);
}
.visit-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(99,102,241,0.5); color: white; }

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding: 0 24px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 48px 0 32px;
  max-width: 1200px;
  margin: 0 auto;
}
.footer-logo {
  font-size: 1.4rem;
  font-weight: 900;
  background: linear-gradient(135deg, #6366f1, #8b5cf6, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.footer-tagline {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 280px;
}
.footer-socials {
  display: flex;
  gap: 10px;
}
.social-chip {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition);
}
.social-chip:hover {
  border-color: var(--accent);
  color: var(--accent-hover);
  background: var(--accent-glow);
  transform: translateY(-2px);
}
.footer-col-title {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a,
.footer-email {
  font-size: 0.83rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-links a:hover,
.footer-email:hover {
  color: var(--accent-hover);
}

/* Footer bottom bar */
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 0;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom-left {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.footer-bottom-right {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
}
.footer-bottom-right a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-bottom-right a:hover {
  color: var(--accent-hover);
}
.footer-sep {
  color: var(--text-muted);
  opacity: 0.4;
}

/* ── Modals ─────────────────────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 9000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.open {
  display: flex;
  animation: fadeIn 0.2s ease;
}
.modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 640px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 36px;
  position: relative;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  animation: slideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-box::-webkit-scrollbar { width: 5px; }
.modal-box::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.9rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.modal-close:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  color: var(--text-primary);
}
.modal-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}
.modal-title {
  font-size: 1.5rem;
  font-weight: 900;
  margin-bottom: 4px;
}
.modal-updated {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.modal-body h3 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 20px 0 8px;
}
.modal-body h3:first-child { margin-top: 0; }
.modal-body p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ── Footer Responsive ──────────────────────────────────────── */
@media (max-width: 900px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 540px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 0 24px;
  }
  .footer-brand { grid-column: auto; }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}