/* ============================================================
   LOCAL FONT FACES
   ============================================================ */
@font-face { font-family: 'Plus Jakarta Sans'; font-style: normal; font-weight: 400; font-display: swap; src: url('../fonts/PlusJakartaSans-Regular.ttf') format('truetype'); }
@font-face { font-family: 'Plus Jakarta Sans'; font-style: normal; font-weight: 500; font-display: swap; src: url('../fonts/PlusJakartaSans-Medium.ttf') format('truetype'); }
@font-face { font-family: 'Plus Jakarta Sans'; font-style: normal; font-weight: 600; font-display: swap; src: url('../fonts/PlusJakartaSans-SemiBold.ttf') format('truetype'); }
@font-face { font-family: 'Plus Jakarta Sans'; font-style: normal; font-weight: 700; font-display: swap; src: url('../fonts/PlusJakartaSans-Bold.ttf') format('truetype'); }
@font-face { font-family: 'Plus Jakarta Sans'; font-style: normal; font-weight: 800; font-display: swap; src: url('../fonts/PlusJakartaSans-ExtraBold.ttf') format('truetype'); }
@font-face { font-family: 'DM Sans'; font-style: normal; font-weight: 400; font-display: swap; src: url('../fonts/DMSans-Regular.ttf') format('truetype'); }
@font-face { font-family: 'DM Sans'; font-style: normal; font-weight: 500; font-display: swap; src: url('../fonts/DMSans-Medium.ttf') format('truetype'); }
@font-face { font-family: 'DM Sans'; font-style: normal; font-weight: 600; font-display: swap; src: url('../fonts/DMSans-SemiBold.ttf') format('truetype'); }
@font-face { font-family: 'DM Sans'; font-style: normal; font-weight: 700; font-display: swap; src: url('../fonts/DMSans-Bold.ttf') format('truetype'); }
@font-face { font-family: 'DM Sans'; font-style: italic; font-weight: 400; font-display: swap; src: url('../fonts/DMSans-Italic.ttf') format('truetype'); }

/* ============================================================
   SHARED STYLES — Ali Bakhtiari Personal Website
   ============================================================ */

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

:root {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-card-hover: #21253a;
  --border: #2a2d3e;
  --text: #e2e8f0;
  --text-muted: #8892a4;
  --text-dim: #4a5568;
  --accent: #6366f1;
  --accent-glow: rgba(99,102,241,0.25);
  --accent2: #8b5cf6;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --transition: 0.2s ease;
  --nav-h: 64px;
  --font: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-heading: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; }

/* ---------- Scrollbar ---------- */
::-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(--text-dim); }

/* ---------- Navigation ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2rem;
  background: rgba(15,17,23,0.85);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.1rem; font-weight: 800; letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

.nav-links { display: flex; gap: 0.25rem; }

.nav-links a {
  padding: 0.4rem 0.9rem; border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 500; color: var(--text-muted);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover, .nav-links a.active {
  color: var(--text); background: var(--bg-card);
}
.nav-links a.active { color: var(--accent); }

/* ---------- Page wrapper ---------- */
.page { padding-top: var(--nav-h); }

/* ---------- Hero / About ---------- */
.hero {
  min-height: calc(100vh - var(--nav-h));
  display: flex; align-items: center; justify-content: center;
  padding: 4rem 2rem;
  position: relative; overflow: hidden;
}

.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(99,102,241,0.18) 0%, transparent 70%);
}

.hero-content {
  position: relative; z-index: 1;
  max-width: 900px; width: 100%;
  display: grid; grid-template-columns: 1fr auto; gap: 4rem; align-items: center;
}

.hero-text h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800; letter-spacing: -0.04em; line-height: 1.05;
  margin-bottom: 0.5rem;
}

.hero-text h1 span {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

.hero-text .subtitle {
  font-size: 1.15rem; color: var(--text-muted); margin-bottom: 1.5rem;
  font-weight: 500;
}

.hero-text .bio {
  font-size: 1rem; color: var(--text-muted); line-height: 1.8;
  max-width: 520px; margin-bottom: 2rem;
}

.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.6rem 1.25rem; border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 600;
  transition: all var(--transition); border: none;
}

.btn-primary {
  background: var(--accent); color: #fff;
}
.btn-primary:hover { background: #5254cc; box-shadow: 0 0 20px var(--accent-glow); }

.btn-outline {
  background: transparent; color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover { background: var(--bg-card); border-color: var(--accent); color: var(--accent); }

.btn-ghost {
  background: var(--bg-card); color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-dim); }

/* ---------- Avatar ---------- */
.avatar-wrap {
  flex-shrink: 0;
  width: 200px; height: 200px;
  border-radius: 50%;
  padding: 3px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 0 40px var(--accent-glow);
}

.avatar-wrap img {
  width: 100%; height: 100%; border-radius: 50%;
  object-fit: cover;
  background: var(--bg-card);
}

.avatar-placeholder {
  width: 100%; height: 100%; border-radius: 50%;
  background: var(--bg-card);
  display: flex; align-items: center; justify-content: center;
  font-size: 5rem;
}

/* ---------- Section ---------- */
.section { padding: 5rem 2rem; max-width: 960px; margin: 0 auto; }
.section-title {
  font-family: var(--font-heading);
  font-size: 1.5rem; font-weight: 700; letter-spacing: -0.03em;
  margin-bottom: 2.5rem; display: flex; align-items: center; gap: 0.75rem;
}
.section-title::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}

/* ---------- Skills chips ---------- */
.skills-grid { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.skill-chip {
  padding: 0.35rem 0.85rem; border-radius: 999px;
  font-size: 0.82rem; font-weight: 500;
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text-muted); transition: all var(--transition);
}
.skill-chip:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Contact cards ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.contact-card {
  display: flex; align-items: center; gap: 1rem;
  padding: 1.25rem 1.5rem; border-radius: var(--radius);
  background: var(--bg-card); border: 1px solid var(--border);
  transition: all var(--transition);
}
.contact-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow); }
.contact-icon { font-size: 1.5rem; flex-shrink: 0; }
.contact-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; }
.contact-value { font-size: 0.95rem; font-weight: 600; }

/* ---------- Utility ---------- */
.link-accent {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.link-accent:hover { color: var(--accent2); }

/* ---------- Footer ---------- */
footer {
  text-align: center; padding: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-dim); font-size: 0.85rem;
}

/* ============================================================
   NOTES PAGE STYLES
   ============================================================ */

.notes-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 0;
  min-height: calc(100vh - var(--nav-h));
}

/* ---------- Sidebar ---------- */
.sidebar {
  position: sticky; top: var(--nav-h);
  height: calc(100vh - var(--nav-h));
  overflow-y: auto;
  padding: 1.5rem 1rem;
  border-right: 1px solid var(--border);
  background: var(--bg);
}

.sidebar-search {
  position: relative; margin-bottom: 1.25rem;
}
.sidebar-search input {
  width: 100%; padding: 0.55rem 0.75rem 0.55rem 2.25rem;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text);
  font-size: 0.85rem; font-family: inherit;
  transition: border-color var(--transition);
}
.sidebar-search input:focus { outline: none; border-color: var(--accent); }
.sidebar-search input::placeholder { color: var(--text-dim); }
.sidebar-search .search-icon {
  position: absolute; left: 0.65rem; top: 50%; transform: translateY(-50%);
  color: var(--text-dim); font-size: 0.9rem; pointer-events: none;
}

.sidebar-label {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-dim);
  padding: 0 0.5rem; margin-bottom: 0.5rem;
}

.topic-btn {
  width: 100%; display: flex; align-items: center; gap: 0.6rem;
  padding: 0.55rem 0.75rem; border-radius: var(--radius-sm);
  background: none; border: none; color: var(--text-muted);
  font-size: 0.875rem; font-weight: 500; text-align: left;
  transition: all var(--transition); cursor: pointer;
}
.topic-btn:hover { background: var(--bg-card); color: var(--text); }
.topic-btn.active { background: var(--bg-card); color: var(--text); }
.topic-btn.active .topic-dot { box-shadow: 0 0 8px currentColor; }

.topic-dot {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
}
.topic-icon { font-size: 1rem; flex-shrink: 0; }
.topic-count {
  margin-left: auto; font-size: 0.72rem;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 999px; padding: 0.1rem 0.45rem;
  color: var(--text-dim);
}

/* ---------- Notes main area ---------- */
.notes-main { padding: 2rem 2.5rem; overflow-y: auto; }

.notes-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 2rem; flex-wrap: wrap; gap: 1rem;
}
.notes-header h1 { font-family: var(--font-heading); font-size: 1.6rem; font-weight: 700; letter-spacing: -0.03em; }
.notes-header .topic-emoji { font-size: 1.8rem; }

.notes-stats {
  font-size: 0.82rem; color: var(--text-muted);
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 999px; padding: 0.3rem 0.85rem;
}

/* ---------- Global search bar (notes page) ---------- */
.notes-search-bar {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.65rem 1rem;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 2rem;
  transition: border-color var(--transition);
}
.notes-search-bar:focus-within { border-color: var(--accent); }
.notes-search-bar input {
  flex: 1; background: none; border: none; color: var(--text);
  font-size: 0.95rem; font-family: inherit;
}
.notes-search-bar input:focus { outline: none; }
.notes-search-bar input::placeholder { color: var(--text-dim); }
.notes-search-bar .search-icon { color: var(--text-dim); font-size: 1rem; }

/* ---------- Subtopic sections ---------- */
.subtopic-section { margin-bottom: 2.5rem; }

.subtopic-header {
  display: flex; align-items: center; gap: 0.6rem;
  margin-bottom: 1rem; cursor: pointer; -webkit-user-select: none; user-select: none;
}
.subtopic-title {
  font-family: var(--font-heading);
  font-size: 0.9rem; font-weight: 700; color: var(--text);
  letter-spacing: -0.01em;
}
.subtopic-count {
  font-size: 0.72rem; color: var(--text-dim);
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 999px; padding: 0.1rem 0.5rem;
}
.subtopic-chevron {
  margin-left: auto; color: var(--text-dim); font-size: 0.75rem;
  transition: transform var(--transition);
}
.subtopic-section.collapsed .subtopic-chevron { transform: rotate(-90deg); }
.subtopic-section.collapsed .notes-list { display: none; }

/* ---------- Notes list ---------- */
.notes-list {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.6rem;
}

.note-card {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.75rem 1rem; border-radius: var(--radius-sm);
  background: var(--bg-card); border: 1px solid var(--border);
  transition: all var(--transition); text-decoration: none;
  color: var(--text);
}
.note-card:hover {
  border-color: var(--accent); background: var(--bg-card-hover);
  transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

.note-type-badge {
  flex-shrink: 0; width: 28px; height: 28px;
  border-radius: 6px; display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700;
}
.badge-html { background: rgba(16,185,129,0.15); color: #10b981; }
.badge-pdf  { background: rgba(239,68,68,0.15);  color: #ef4444; }
.badge-notion { background: rgba(99,102,241,0.15); color: #6366f1; }
.badge-external { background: rgba(245,158,11,0.15); color: #f59e0b; }

.note-title {
  font-size: 0.85rem; font-weight: 500; line-height: 1.35;
  flex: 1;
}

.note-arrow {
  flex-shrink: 0; color: var(--text-dim); font-size: 0.75rem;
  opacity: 0; transition: opacity var(--transition);
}
.note-card:hover .note-arrow { opacity: 1; }

/* ---------- Empty / search results ---------- */
.empty-state {
  text-align: center; padding: 4rem 2rem; color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 3rem; margin-bottom: 1rem; }
.empty-state p { font-size: 0.95rem; }

/* ---------- All-topics grid (landing view) ---------- */
.topics-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem; margin-bottom: 2rem;
}
.topic-card {
  padding: 1.5rem; border-radius: var(--radius);
  background: var(--bg-card); border: 1px solid var(--border);
  cursor: pointer; transition: all var(--transition);
  display: flex; flex-direction: column; gap: 0.75rem;
}
.topic-card:hover {
  border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow);
}
.topic-card-icon { font-size: 2rem; }
.topic-card-title { font-family: var(--font-heading); font-size: 1rem; font-weight: 700; letter-spacing: -0.02em; }
.topic-card-meta { font-size: 0.8rem; color: var(--text-muted); }
.topic-card-bar {
  height: 3px; border-radius: 2px; margin-top: auto;
}

/* ---------- Highlight for search ---------- */
mark {
  background: rgba(99,102,241,0.3); color: var(--text);
  border-radius: 2px; padding: 0 1px;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; gap: 2rem; }
  .hero-content .avatar-wrap { margin: 0 auto; width: 150px; height: 150px; }
  .hero-text .bio { margin: 0 auto 2rem; }
  .hero-actions { justify-content: center; }

  .notes-layout { grid-template-columns: 1fr; }
  .sidebar {
    position: static; height: auto;
    border-right: none; border-bottom: 1px solid var(--border);
    padding: 1rem;
  }
  .notes-main { padding: 1.5rem 1rem; }
  .notes-list { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .nav { padding: 0 1rem; }
  .nav-links a { padding: 0.35rem 0.6rem; font-size: 0.82rem; }
  .section { padding: 3rem 1rem; }
}