/* =============================================================
   Portfolio 1.0 — Shared Theme / Design System
   Inspired by Portfolio 2.0 (purple accent, dark/light theming)
   ============================================================= */

@import url('https://fonts.googleapis.com/css2?family=Fira+Sans:wght@300;400;500;600;700;800&family=Source+Code+Pro:wght@400;500;600&family=Dancing+Script:wght@500;600;700&family=Lovers+Quarrel&display=swap');
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css');

/* ===== DESIGN TOKENS ===== */
:root {
  --accent: #4f46e5;
  --accent-2: #7c3aed;
  --accent-light: #818cf8;
  --accent-dark: #3730a3;
  --accent-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  --accent-glow: rgba(79, 70, 229, 0.12);

  --font-body: 'Fira Sans', sans-serif;
  --font-script: 'Lovers Quarrel', cursive;
  --font-display: 'Dancing Script', cursive;
  --font-mono: 'Source Code Pro', monospace;

  --bg-page: linear-gradient(135deg, #edf0ff 0%, #f5f0ff 40%, #edf5ff 100%);
  --bg: #f8f9ff;
  --bg-card: #ffffff;
  --bg-subtle: #f1f3ff;

  --text-dark: #111827;
  --text-body: #374151;
  --text-muted: #6b7280;

  --border: #e5e7eb;
  --border-accent: rgba(79, 70, 229, 0.3);

  --shadow-sm: 0 1px 4px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
  --shadow-hover: 0 8px 30px rgba(79, 70, 229, 0.18);

  --nav-bg: rgba(255, 255, 255, 0.92);

  --r: 1rem;
  --r-sm: 0.5rem;
  --r-full: 9999px;
  --nav-h: 4.5rem;
}

[data-theme="dark"] {
  --accent-glow: rgba(124, 58, 237, 0.22);

  --bg-page: linear-gradient(135deg, #060d1a 0%, #0a1124 45%, #07101f 100%);
  --bg: #07101f;
  --bg-card: #0e1a33;
  --bg-subtle: #0b1730;

  --text-dark: #eef4ff;
  --text-body: #a8bfe0;
  --text-muted: #6287b8;

  --border: #1c3461;
  --border-accent: rgba(129, 140, 248, 0.35);

  --shadow-sm: 0 1px 4px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.45);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.5);
  --shadow-hover: 0 8px 30px rgba(124, 58, 237, 0.35);

  --nav-bg: rgba(10, 17, 36, 0.85);
}

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

* {
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

img { -webkit-user-drag: none; user-select: none; max-width: 100%; height: auto; }

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

h1, h2, h3, h4 { font-family: var(--font-body); font-weight: 700; letter-spacing: -0.01em; }

body {
  font-family: var(--font-body);
  background: var(--bg-page) fixed;
  color: var(--text-body);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.3s ease, color 0.3s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== NAVBAR ===== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 6%;
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.site-nav.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.nav-brand {
  font-family: var(--font-script);
  font-size: 2.7rem;
  font-weight: 400;
  line-height: 1;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-right { display: flex; align-items: center; gap: 1.5rem; }

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-dark);
  padding-bottom: 0.2rem;
  transition: color 0.2s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: width 0.25s ease;
}

.nav-links a:hover,
.nav-links a.active { color: var(--accent); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

/* Theme toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  background: var(--bg-card);
  color: var(--text-dark);
  font-size: 1rem;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--border-accent); transform: translateY(-2px); }

/* Hamburger */
.nav-hamburger {
  display: none;
  width: 2.4rem;
  height: 2.4rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  background: var(--bg-card);
  color: var(--text-dark);
  font-size: 1.1rem;
  cursor: pointer;
}

/* Mobile menu panel */
.mobile-menu {
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  z-index: 999;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  transform: translateY(-130%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.mobile-menu.open { transform: translateY(0); }
.mobile-menu ul { list-style: none; padding: 0.5rem 0; }
.mobile-menu a {
  display: block;
  padding: 0.9rem 8%;
  font-weight: 500;
  color: var(--text-dark);
  border-bottom: 1px solid var(--border);
}
.mobile-menu a:hover, .mobile-menu a.active { color: var(--accent); background: var(--bg-subtle); }

/* ===== LAYOUT HELPERS ===== */
.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(2.5rem, 5vw, 4rem) clamp(1.25rem, 6vw, 4rem);
}

.eyebrow {
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.section-title {
  text-align: center;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.4rem);
  font-weight: 700;
  letter-spacing: 0;
  color: var(--text-dark);
  margin-bottom: 2.5rem;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.6rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--r-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}
.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.btn-outline {
  background: transparent;
  color: var(--text-dark);
  border-color: var(--border);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-3px); }

/* ===== SOCIAL ICONS ===== */
.social-row { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: var(--r-full);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-dark);
  font-size: 1.1rem;
  transition: transform 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.social-link:hover {
  transform: translateY(-3px);
  color: var(--accent);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-hover);
}

/* ===== CARDS ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--border-accent); }

/* ===== BADGES ===== */
.skill-badges { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.badge {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 500;
  border-radius: var(--r-full);
  border: 1px solid transparent;
}
.badge-primary { background: var(--accent-gradient); color: #fff; }
.badge-secondary { background: var(--bg-subtle); color: var(--text-body); border-color: var(--border); }
.badge-accent {
  background: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
  color: #fff;
}

/* ===== SKILLS GRID ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
  gap: 1.25rem;
}
.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 1.4rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.skill-category:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--border-accent); }
.skill-category-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 1rem;
}
.skill-category-icon { font-size: 1.3rem; }
.skill-count {
  margin-left: auto;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 0.15rem 0.55rem;
  border-radius: var(--r-full);
}

/* ===== TIMELINE ===== */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0.4rem;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 2px;
  background: var(--accent-gradient);
}
.timeline-item { position: relative; margin-bottom: 2rem; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.72rem;
  top: 0.35rem;
  width: 0.85rem;
  height: 0.85rem;
  border-radius: var(--r-full);
  background: var(--accent);
  border: 3px solid var(--bg-card);
  box-shadow: 0 0 0 2px var(--accent);
}
.timeline-role { font-size: 1.15rem; font-weight: 700; color: var(--text-dark); }
.timeline-company { font-size: 0.95rem; font-weight: 600; color: var(--accent); margin-bottom: 0.25rem; }
.timeline-period {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-subtle);
  padding: 0.15rem 0.65rem;
  border-radius: var(--r-full);
  margin-bottom: 0.6rem;
}
.timeline-progression { font-style: italic; font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.timeline-bullets { list-style: none; }
.timeline-bullets li { position: relative; padding-left: 1.3rem; margin-bottom: 0.4rem; font-size: 0.92rem; }
.timeline-bullets li::before { content: '\2192'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* ===== FOOTER ===== */
.site-footer {
  text-align: center;
  padding: 2rem 6%;
  margin-top: 3rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
}
.site-footer .social-row { justify-content: center; margin-bottom: 1rem; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-hamburger { display: inline-flex; }
}