/* ===================================================
   ALLERGO NORDIC-INSPIRED PORTFOLIO — DESIGN SYSTEM
   Palette: slate neutrals + brand blue (#2563eb)
   Font: Inter · JetBrains Mono
=================================================== */

/* ── Variables ── */
:root {
  --brand-50:  #eff6ff;
  --brand-100: #dbeafe;
  --brand-400: #60a5fa;
  --brand-500: #3b82f6;
  --brand-600: #2563eb;
  --brand-700: #1d4ed8;
  --brand-800: #1e40af;

  --slate-50:  #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;

  --purple-500: #8b5cf6;
  --teal-500:   #14b8a6;
  --orange-500: #f97316;
  --green-500:  #22c55e;
  --rose-500:   #f43f5e;
  --amber-500:  #f59e0b;

  --bg:        var(--slate-50);
  --surface:   #ffffff;
  --border:    var(--slate-200);
  --text:      var(--slate-700);
  --text-dark: var(--slate-900);
  --text-muted:var(--slate-400);

  --radius-sm: 8px;
  --radius:    12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow:    0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -1px rgba(0,0,0,.04);
  --shadow-md: 0 10px 15px -3px rgba(0,0,0,.07), 0 4px 6px -2px rgba(0,0,0,.04);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,.08), 0 10px 10px -5px rgba(0,0,0,.04);

  --nav-h: 64px;
  --transition: all .2s cubic-bezier(.4,0,.2,1);
}

[data-theme="dark"] {
  --bg:         #0f172a;
  --surface:    #1e293b;
  --border:     #334155;
  --text:       #cbd5e1;
  --text-dark:  #f1f5f9;
  --text-muted: #64748b;
  --shadow-sm:  0 1px 3px rgba(0,0,0,.4);
  --shadow:     0 4px 6px -1px rgba(0,0,0,.4);
  --shadow-md:  0 10px 15px -3px rgba(0,0,0,.4);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ── Container ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ── Section base ── */
.section { padding: 96px 0; }
.section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--brand-600);
  margin-bottom: 8px;
}
.section-heading {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: -.02em;
  line-height: 1.15;
  margin-bottom: 16px;
}
.section-sub {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 48px;
}

/* ─────────────────────────────────────────
   BUTTONS
───────────────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--brand-600);
  color: #fff;
  padding: 11px 22px;
  border-radius: var(--radius);
  font-size: 14px; font-weight: 600;
  border: none; cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 1px 3px rgba(37,99,235,.3);
  white-space: nowrap;
}
.btn-primary:hover { background: var(--brand-700); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(37,99,235,.35); }
.btn-primary.full-w { width: 100%; justify-content: center; }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent;
  color: var(--text-dark);
  padding: 11px 22px;
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  font-size: 14px; font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.btn-ghost:hover { background: var(--slate-100); border-color: var(--slate-300); }

/* ─────────────────────────────────────────
   SCROLL BAR
───────────────────────────────────────── */
.scroll-bar { position: fixed; top: var(--nav-h); left: 0; right: 0; height: 3px; background: var(--slate-100); z-index: 999; }
.scroll-fill { height: 100%; width: 0; background: var(--brand-600); transition: width .1s linear; }

/* ─────────────────────────────────────────
   NAVBAR
───────────────────────────────────────── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  background: rgba(248,250,252,.85);
  backdrop-filter: blur(12px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.navbar.scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow-sm); }
[data-theme="dark"] .navbar { background: rgba(15,23,42,.85); }

.nav-container {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.nav-logo { display: flex; align-items: center; gap: 6px; }
.logo-name { font-weight: 700; font-size: 15px; color: var(--text-dark); }
.logo-sep { color: var(--text-muted); font-size: 16px; }
.logo-role { font-size: 13px; color: var(--brand-600); font-weight: 500; }

.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-menu a {
  font-size: 14px; font-weight: 500; color: var(--text);
  padding: 6px 12px; border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-menu a:hover { color: var(--brand-600); background: var(--brand-50); }

.nav-actions { display: flex; align-items: center; gap: 10px; }
.theme-btn {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--border); background: var(--surface);
  color: var(--text); cursor: pointer; display: grid; place-items: center;
  transition: var(--transition);
}
.theme-btn:hover { border-color: var(--brand-400); color: var(--brand-600); }

.nav-cta {
  font-size: 13px; font-weight: 600;
  background: var(--brand-600); color: #fff;
  padding: 7px 16px; border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-cta:hover { background: var(--brand-700); }

.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text-dark); border-radius: 2px; transition: var(--transition); }

/* ─────────────────────────────────────────
   HERO
───────────────────────────────────────── */
.hero {
  position: relative;
  padding-top: calc(var(--nav-h) + 72px);
  padding-bottom: 96px;
  overflow: hidden;
  background: var(--bg);
}
.hero-grid-bg {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .35;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 64px; align-items: center;
}
/* When photo card is present, give right column more room */
.hero-inner--photo {
  grid-template-columns: 1fr 260px;
  align-items: start;
  padding-top: 16px;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 500; color: var(--text-muted);
  margin-bottom: 20px;
}
.pulse-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 0 rgba(34,197,94,.4);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(34,197,94,.4); }
  70%  { box-shadow: 0 0 0 8px rgba(34,197,94,0); }
  100% { box-shadow: 0 0 0 0 rgba(34,197,94,0); }
}
.hero-heading {
  font-size: clamp(40px, 6vw, 68px);
  font-weight: 800; line-height: 1.05;
  letter-spacing: -.03em; color: var(--text-dark);
  margin-bottom: 20px;
}
.gradient-text {
  background: linear-gradient(135deg, var(--brand-600) 0%, var(--purple-500) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 17px; color: var(--text-muted); line-height: 1.7;
  max-width: 560px; margin-bottom: 28px;
}
.hero-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 500; color: var(--slate-600);
  background: var(--surface); border: 1.5px solid var(--border);
  padding: 5px 12px; border-radius: 100px;
  transition: var(--transition);
}
.chip i { color: var(--brand-600); font-size: 11px; }
.chip:hover { border-color: var(--brand-400); color: var(--brand-700); background: var(--brand-50); }
[data-theme="dark"] .chip { color: var(--slate-300); background: var(--surface); }

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-socials { display: flex; gap: 12px; }
.hero-socials a {
  width: 38px; height: 38px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--border); background: var(--surface);
  display: grid; place-items: center;
  color: var(--text); font-size: 15px; transition: var(--transition);
}
.hero-socials a:hover { border-color: var(--brand-400); color: var(--brand-600); background: var(--brand-50); }

/* Hero stat cards column */
.hero-right-col { display: flex; flex-direction: column; gap: 12px; }
.hero-photo-card {
  background: var(--surface); border: 1.5px solid var(--border);
  border-radius: var(--radius-xl); overflow: hidden;
  box-shadow: var(--shadow-md); transition: var(--transition);
}
.hero-photo-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.hero-photo-wrap { position: relative; }
.hero-photo {
  width: 100%; aspect-ratio: 3/4; object-fit: cover; object-position: center top;
  display: block;
}
.hero-photo-badge {
  position: absolute; bottom: 12px; left: 12px; right: 12px;
  display: flex; align-items: center; gap: 7px;
  background: rgba(255,255,255,.92); backdrop-filter: blur(8px);
  border-radius: 8px; padding: 6px 10px;
  font-size: 11px; font-weight: 600; color: var(--slate-700);
  box-shadow: 0 2px 8px rgba(0,0,0,.12);
}
[data-theme="dark"] .hero-photo-badge { background: rgba(30,41,59,.92); color: var(--slate-300); }
.hero-photo-info {
  padding: 14px 16px 16px;
  border-top: 1px solid var(--border);
}
.hero-photo-name { font-size: 14px; font-weight: 700; color: var(--text-dark); margin-bottom: 2px; }
.hero-photo-title { font-size: 12px; color: var(--brand-600); font-weight: 500; margin-bottom: 4px; }
.hero-photo-loc { font-size: 11px; color: var(--text-muted); display: flex; align-items: center; gap: 5px; }
.hero-photo-loc i { font-size: 10px; color: var(--brand-400); }

.hstat-card {
  background: var(--surface); border: 1.5px solid var(--border);
  border-radius: var(--radius-lg); padding: 20px 24px;
  box-shadow: var(--shadow-sm); transition: var(--transition);
}
.hstat-card:hover { box-shadow: var(--shadow); border-color: var(--brand-300, #93c5fd); transform: translateY(-2px); }
.hstat-num { display: block; font-size: 28px; font-weight: 800; color: var(--brand-600); line-height: 1; margin-bottom: 4px; }
.hstat-lbl { display: block; font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .06em; }

/* ─────────────────────────────────────────
   ABOUT
───────────────────────────────────────── */
.about-section { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.about-text p { margin-bottom: 16px; font-size: 15px; line-height: 1.75; color: var(--text); }
.about-text strong { color: var(--text-dark); font-weight: 600; }
.about-metrics {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 32px;
}
.am-item {
  background: var(--bg); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 16px;
}
.am-val { display: block; font-size: 26px; font-weight: 800; color: var(--brand-600); line-height: 1; }
.am-key { display: block; font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .06em; margin-top: 4px; }

/* Education sub-heading */
.edu-heading { font-size: 14px; font-weight: 700; color: var(--text-dark); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 20px; }

/* Timeline */
.timeline { position: relative; padding-left: 24px; }
.timeline::before {
  content: ''; position: absolute; left: 7px; top: 6px; bottom: 0;
  width: 2px; background: var(--border); border-radius: 2px;
}
.tl-item { position: relative; margin-bottom: 32px; }
.tl-dot {
  position: absolute; left: -24px; top: 6px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--surface); border: 2.5px solid var(--slate-300);
  z-index: 1;
}
.tl-dot.brand-dot { border-color: var(--brand-600); background: var(--brand-600); }
.tl-dot.accent-dot { border-color: var(--amber-500); background: var(--amber-500); }
.tl-date { font-size: 11px; font-weight: 600; color: var(--brand-600); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 4px; }
.tl-body h4 { font-size: 14px; font-weight: 700; color: var(--text-dark); margin-bottom: 4px; }
.tl-body p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }
.tl-docs { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.tl-doc-btn {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11.5px; font-weight: 600;
  color: var(--brand-600); text-decoration: none;
  padding: 5px 12px;
  border: 1.5px solid var(--brand-100);
  border-radius: var(--radius-sm);
  background: var(--brand-50);
  transition: var(--transition);
}
.tl-doc-btn:hover { background: var(--brand-600); color: #fff; border-color: var(--brand-600); }
[data-theme="dark"] .tl-doc-btn { background: rgba(37,99,235,.15); border-color: rgba(37,99,235,.3); color: var(--brand-400); }
[data-theme="dark"] .tl-doc-btn:hover { background: var(--brand-600); color: #fff; border-color: var(--brand-600); }

/* ─────────────────────────────────────────
   EXPERIENCE
───────────────────────────────────────── */
.experience-section { background: var(--bg); }
.exp-list { display: flex; flex-direction: column; gap: 0; }

.exp-card {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 0 24px;
  position: relative;
}

.exp-left {
  display: flex; flex-direction: column; align-items: center;
}
.exp-icon-wrap {
  width: 44px; height: 44px; border-radius: 12px;
  display: grid; place-items: center;
  color: #fff; font-size: 17px; flex-shrink: 0;
  box-shadow: var(--shadow-sm); z-index: 1;
}
.exp-line {
  width: 2px; flex: 1; background: var(--border);
  margin: 8px 0; border-radius: 2px; min-height: 32px;
}
.exp-line--last { min-height: 0; }

.exp-body {
  background: var(--surface); border: 1.5px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px 28px;
  margin-bottom: 20px; transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.exp-body:hover { box-shadow: var(--shadow-md); border-color: var(--slate-300); transform: translateY(-2px); }

.exp-header {
  display: flex; align-items: flex-start;
  justify-content: space-between; gap: 16px;
  margin-bottom: 12px;
}
.exp-header h3 {
  font-size: 16px; font-weight: 700; color: var(--text-dark);
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.exp-type {
  font-size: 10px; font-weight: 700; letter-spacing: .07em;
  text-transform: uppercase; color: var(--brand-600);
  background: var(--brand-50); border: 1px solid var(--brand-100);
  padding: 2px 8px; border-radius: 4px;
}
.exp-type--accent {
  color: var(--purple-500);
  background: rgba(139,92,246,.08);
  border-color: rgba(139,92,246,.2);
}
.exp-company { font-size: 13px; color: var(--text-muted); margin-top: 4px; }
.exp-company strong { color: var(--text-dark); }
.exp-date {
  font-size: 11px; font-weight: 600; color: var(--brand-600);
  white-space: nowrap; text-transform: uppercase; letter-spacing: .06em;
  background: var(--brand-50); border: 1px solid var(--brand-100);
  padding: 4px 10px; border-radius: 6px; height: fit-content;
}

.exp-summary {
  font-size: 14px; color: var(--text); line-height: 1.7;
  margin-bottom: 14px; border-left: 3px solid var(--brand-100);
  padding-left: 14px;
}

.exp-bullets {
  display: flex; flex-direction: column; gap: 8px;
  margin-bottom: 18px;
}
.exp-bullets li {
  font-size: 13px; color: var(--text-muted); line-height: 1.65;
  padding-left: 18px; position: relative;
}
.exp-bullets li::before {
  content: '▸'; position: absolute; left: 0;
  color: var(--brand-500); font-size: 11px; top: 2px;
}
.exp-bullets li strong { color: var(--text-dark); font-weight: 600; }

.exp-tags {
  display: flex; flex-wrap: wrap; gap: 5px;
  padding-top: 14px; border-top: 1px solid var(--border);
}
.exp-tags span {
  font-size: 11px; font-weight: 500; color: var(--brand-700);
  background: var(--brand-50); border: 1px solid var(--brand-100);
  padding: 3px 9px; border-radius: 5px;
}
[data-theme="dark"] .exp-tags span {
  background: rgba(37,99,235,.12); color: var(--brand-400);
  border-color: rgba(37,99,235,.2);
}

/* ─────────────────────────────────────────
   SKILLS
───────────────────────────────────────── */
.skills-section { background: var(--bg); }
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 56px; }
.skill-card {
  background: var(--surface); border: 1.5px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px;
  box-shadow: var(--shadow-sm); transition: var(--transition);
}
.skill-card:hover { box-shadow: var(--shadow-md); border-color: var(--slate-300); transform: translateY(-2px); }
.sk-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.sk-icon {
  width: 40px; height: 40px; border-radius: 10px;
  display: grid; place-items: center; flex-shrink: 0;
  font-size: 16px; color: #fff;
}
.sk-header h3 { font-size: 14px; font-weight: 700; color: var(--text-dark); }
.sk-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.sk-tags span {
  font-size: 11px; font-weight: 500; color: var(--slate-600);
  background: var(--bg); border: 1px solid var(--border);
  padding: 3px 9px; border-radius: 6px;
}
[data-theme="dark"] .sk-tags span { background: var(--slate-800); color: var(--slate-300); }

/* icon bg colours */
.brand-bg  { background: var(--brand-600); }
.purple-bg { background: var(--purple-500); }
.teal-bg   { background: var(--teal-500); }
.orange-bg { background: var(--orange-500); }
.green-bg  { background: var(--green-500); }
.rose-bg   { background: var(--rose-500); }

/* Competency bars */
.comp-section { background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius-xl); padding: 40px 48px; }
.comp-title { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 28px; }
.comp-bars { display: flex; flex-direction: column; gap: 20px; }
.comp-info { display: flex; justify-content: space-between; margin-bottom: 8px; }
.comp-info span { font-size: 13px; font-weight: 500; color: var(--text); }
.comp-pct { font-size: 13px; font-weight: 700; color: var(--brand-600); }
.comp-track { height: 6px; background: var(--slate-100); border-radius: 100px; overflow: hidden; }
.comp-fill { height: 100%; width: 0; background: var(--brand-600); border-radius: 100px; transition: width 1.2s cubic-bezier(.4,0,.2,1); }
[data-theme="dark"] .comp-track { background: var(--slate-700); }

/* ─────────────────────────────────────────
   PROJECTS
───────────────────────────────────────── */
.projects-section { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.projects-toolbar { margin-bottom: 40px; display: flex; flex-direction: column; gap: 16px; }

/* Search */
.search-wrap { position: relative; max-width: 480px; }
.search-ico { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 13px; pointer-events: none; }
.search-input {
  width: 100%; padding: 10px 40px 10px 40px;
  border: 1.5px solid var(--border); border-radius: var(--radius);
  background: var(--bg); color: var(--text-dark);
  font-size: 14px; font-family: inherit;
  transition: var(--transition); outline: none;
}
.search-input:focus { border-color: var(--brand-400); box-shadow: 0 0 0 3px var(--brand-100); }
.clear-btn { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 2px 4px; }

/* Filter pills */
.filter-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  font-size: 12px; font-weight: 600; padding: 6px 14px;
  border-radius: 100px; border: 1.5px solid var(--border);
  background: var(--bg); color: var(--text-muted);
  cursor: pointer; transition: var(--transition);
  display: inline-flex; align-items: center; gap: 6px;
}
.pill:hover { border-color: var(--brand-400); color: var(--brand-600); background: var(--brand-50); }
.pill.active { background: var(--brand-600); color: #fff; border-color: var(--brand-600); }
.pill-count {
  background: rgba(255,255,255,.25); color: inherit;
  font-size: 10px; font-weight: 700;
  min-width: 18px; height: 18px; border-radius: 100px;
  display: inline-flex; align-items: center; justify-content: center; padding: 0 4px;
}
.pill:not(.active) .pill-count { background: var(--slate-200); color: var(--slate-600); }

/* Projects grid */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.project-card {
  background: var(--bg); border: 1.5px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: var(--transition); display: flex; flex-direction: column;
}
.project-card:hover { box-shadow: var(--shadow-md); border-color: var(--slate-300); transform: translateY(-3px); }
.pc-img { aspect-ratio: 16/9; overflow: hidden; }
.pc-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.project-card:hover .pc-img img { transform: scale(1.04); }
.pc-body { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.pc-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; margin-bottom: 10px; }
.pc-category {
  font-size: 10px; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--brand-600);
  background: var(--brand-50); border: 1px solid var(--brand-100);
  padding: 3px 8px; border-radius: 4px;
}
[data-theme="dark"] .pc-category { background: rgba(37,99,235,.15); }
.pc-links { display: flex; gap: 6px; }
.pc-links a {
  width: 30px; height: 30px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface);
  display: grid; place-items: center; font-size: 13px; color: var(--text-muted);
  transition: var(--transition);
}
.pc-links a:hover { border-color: var(--brand-400); color: var(--brand-600); }
.pc-body h3 { font-size: 15px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; line-height: 1.35; }
.pc-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 16px; flex: 1;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; line-clamp: 3; overflow: hidden; }
.pc-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 14px; }
.pc-tags span { font-size: 11px; font-weight: 500; background: var(--slate-100); color: var(--slate-600); padding: 2px 8px; border-radius: 4px; }
[data-theme="dark"] .pc-tags span { background: var(--slate-700); color: var(--slate-300); }
.pc-stats { display: flex; gap: 12px; border-top: 1px solid var(--border); padding-top: 14px; margin-top: auto; }
.pc-stat { display: flex; flex-direction: column; }
.pc-stat-val { font-size: 14px; font-weight: 800; color: var(--brand-600); line-height: 1; }
.pc-stat-key { font-size: 10px; font-weight: 500; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; margin-top: 2px; }

.no-results { text-align: center; color: var(--text-muted); padding: 48px; font-size: 15px; }

/* ─────────────────────────────────────────
   RESEARCH
───────────────────────────────────────── */
.research-section { background: var(--bg); }
.research-card {
  background: var(--surface); border: 1.5px solid var(--border);
  border-radius: var(--radius-xl); padding: 40px 48px;
  box-shadow: var(--shadow-sm);
}
.rc-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 24px; }
.rc-title-row { display: flex; align-items: flex-start; gap: 16px; }
.rc-icon-wrap {
  width: 48px; height: 48px; border-radius: var(--radius);
  background: var(--brand-600); color: #fff;
  display: grid; place-items: center; font-size: 20px; flex-shrink: 0;
}
.rc-title-row h3 { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 4px; }
.rc-meta { font-size: 13px; color: var(--text-muted); }
.conf-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11px; font-weight: 700; color: var(--amber-500);
  background: rgba(245,158,11,.1); border: 1px solid rgba(245,158,11,.3);
  padding: 5px 12px; border-radius: 6px; white-space: nowrap;
}
.rc-thesis-title { font-size: 18px; font-weight: 700; color: var(--text-dark); line-height: 1.4; margin-bottom: 6px; }
.rc-partner { font-size: 13px; color: var(--text-muted); margin-bottom: 16px; }
.rc-overview { font-size: 14px; color: var(--text); line-height: 1.7; margin-bottom: 32px; }
.rc-achievements { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 32px; }
.rca-item {
  display: flex; align-items: flex-start; gap: 12px;
  background: var(--bg); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 16px;
}
.rca-item > i { font-size: 16px; color: var(--brand-600); margin-top: 2px; flex-shrink: 0; }
.rca-item div { display: flex; flex-direction: column; }
.rca-item strong { font-size: 20px; font-weight: 800; color: var(--text-dark); line-height: 1; }
.rca-item span { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

.rc-methods h5 { font-size: 13px; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; text-transform: uppercase; letter-spacing: .06em; }
.rc-methods ul { display: flex; flex-direction: column; gap: 6px; margin-bottom: 24px; }
.rc-methods li { font-size: 13px; color: var(--text); padding-left: 16px; position: relative; line-height: 1.6; }
.rc-methods li::before { content: '·'; position: absolute; left: 4px; color: var(--brand-600); font-weight: 800; }

.rc-links { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
.rc-link-btn {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 13px; font-weight: 600;
  text-decoration: none;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--brand-200);
  color: var(--brand-600);
  background: var(--brand-50);
  transition: var(--transition);
}
.rc-link-btn:hover { background: var(--brand-600); color: #fff; border-color: var(--brand-600); }
.rc-link-btn--primary { background: var(--brand-600); color: #fff; border-color: var(--brand-600); }
.rc-link-btn--primary:hover { background: var(--brand-700); border-color: var(--brand-700); }
[data-theme="dark"] .rc-link-btn { background: rgba(37,99,235,.15); border-color: rgba(37,99,235,.3); color: var(--brand-400); }
[data-theme="dark"] .rc-link-btn:hover { background: var(--brand-600); color: #fff; border-color: var(--brand-600); }
[data-theme="dark"] .rc-link-btn--primary { background: var(--brand-600); color: #fff; }

.rc-conf-note {
  display: flex; align-items: flex-start; gap: 10px;
  background: rgba(37,99,235,.05); border: 1px solid var(--brand-100);
  border-radius: var(--radius); padding: 14px 18px;
  font-size: 12px; color: var(--text-muted); line-height: 1.6;
}
.rc-conf-note i { color: var(--brand-500); margin-top: 2px; flex-shrink: 0; }

/* ─────────────────────────────────────────
   THESIS REQUEST MODAL
───────────────────────────────────────── */
.tr-overlay {
  display: none; position: fixed; inset: 0; z-index: 9000;
  background: rgba(0,0,0,.55); backdrop-filter: blur(4px);
  align-items: center; justify-content: center; padding: 20px;
}
.tr-overlay.open { display: flex; }
.tr-modal {
  position: relative; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl, 0 24px 60px rgba(0,0,0,.18));
  padding: 40px 36px 32px; max-width: 460px; width: 100%;
  text-align: center; animation: trSlideIn .22s ease;
}
@keyframes trSlideIn {
  from { opacity: 0; transform: translateY(18px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.tr-close {
  position: absolute; top: 14px; right: 16px;
  background: none; border: none; font-size: 22px;
  color: var(--text-muted); cursor: pointer; line-height: 1;
  transition: var(--transition);
}
.tr-close:hover { color: var(--text-dark); }
.tr-icon {
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--brand-50); border: 2px solid var(--brand-100);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; color: var(--brand-600);
  margin: 0 auto 18px;
}
.tr-modal h3 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; }
.tr-desc { font-size: 13.5px; color: var(--text-muted); line-height: 1.65; margin-bottom: 22px; }
.tr-mail-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--brand-600); color: #fff;
  font-size: 14px; font-weight: 600;
  padding: 11px 24px; border-radius: var(--radius-sm);
  text-decoration: none; transition: var(--transition);
  margin-bottom: 16px;
}
.tr-mail-btn:hover { background: var(--brand-700); }
.tr-note { font-size: 12px; color: var(--text-muted); display: flex; align-items: center; justify-content: center; gap: 6px; }
.tr-note i { color: var(--brand-500); }
[data-theme="dark"] .tr-icon { background: rgba(37,99,235,.15); border-color: rgba(37,99,235,.3); }

/* ─────────────────────────────────────────
   AWARDS & RECOGNITION
───────────────────────────────────────── */
.awards-section { background: var(--bg); }

.award-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 0;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}
.award-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }

/* Gold accent variant */
.award-card--gold {
  border-color: #d97706;
  box-shadow: 0 4px 6px -1px rgba(217,119,6,.12), 0 2px 4px -1px rgba(0,0,0,.04),
              0 0 0 1px rgba(217,119,6,.08);
}
.award-card--gold:hover {
  box-shadow: 0 20px 25px -5px rgba(217,119,6,.15), 0 10px 10px -5px rgba(217,119,6,.08),
              0 0 0 1px rgba(217,119,6,.12);
}

/* LEFT panel */
.award-left {
  background: linear-gradient(160deg, #92400e 0%, #b45309 40%, #d97706 100%);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 20px; padding: 40px 24px;
  position: relative; overflow: hidden;
}
.award-left::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,.12) 0%, transparent 60%);
}
.award-trophy {
  width: 72px; height: 72px;
  background: rgba(255,255,255,.15);
  border: 2px solid rgba(255,255,255,.3);
  border-radius: 50%;
  display: grid; place-items: center;
  backdrop-filter: blur(4px);
  position: relative; z-index: 1;
}
.award-trophy i { font-size: 30px; color: #fef3c7; }

.award-position { text-align: center; position: relative; z-index: 1; }
.award-rank {
  display: block; font-size: 22px; font-weight: 800;
  color: #fef3c7; line-height: 1; letter-spacing: -.02em;
}
.award-rank sup { font-size: 13px; vertical-align: super; }
.award-rank-label {
  display: block; font-size: 11px; font-weight: 600;
  color: rgba(254,243,199,.75); text-transform: uppercase;
  letter-spacing: .1em; margin-top: 4px;
}

/* RIGHT panel */
.award-right { padding: 32px 36px; }

.award-header { margin-bottom: 16px; }
.award-badge-row {
  display: flex; align-items: center; gap: 8px;
  flex-wrap: wrap; margin-bottom: 10px;
}
.award-org-badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 700; letter-spacing: .07em;
  text-transform: uppercase;
  color: #fff;
  background: #ff9900;
  padding: 3px 10px; border-radius: 5px;
}
.award-org-badge i { font-size: 12px; }
.award-date-badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 600; color: var(--amber-500);
  background: rgba(245,158,11,.1); border: 1px solid rgba(245,158,11,.25);
  padding: 3px 10px; border-radius: 5px;
}

.award-title {
  font-size: 20px; font-weight: 800; color: var(--text-dark);
  line-height: 1.3; margin-bottom: 5px; letter-spacing: -.02em;
}
.award-subtitle { font-size: 14px; color: var(--text-muted); line-height: 1.5; }

.award-summary {
  font-size: 14px; color: var(--text); line-height: 1.75;
  margin-bottom: 24px;
  padding: 14px 16px;
  background: var(--bg); border-left: 3px solid #d97706;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* Metrics row */
.award-metrics {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 12px; margin-bottom: 24px;
}
.award-metric {
  display: flex; align-items: flex-start; gap: 10px;
  background: var(--bg); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 12px 14px;
  transition: var(--transition);
}
.award-metric:hover { border-color: #d97706; background: rgba(217,119,6,.04); }
.award-metric > i { font-size: 15px; color: #d97706; margin-top: 2px; flex-shrink: 0; }
.am2-val { display: block; font-size: 13px; font-weight: 800; color: var(--text-dark); line-height: 1.2; }
.am2-key { display: block; font-size: 10px; font-weight: 500; color: var(--text-muted); margin-top: 2px; }

/* Tech breakdown grid */
.award-tech-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 16px; margin-bottom: 22px;
}
.award-tech-block {
  background: var(--bg); border: 1.5px solid var(--border);
  border-radius: var(--radius); padding: 16px 18px;
}
.award-tech-block h5 {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .08em; color: var(--text-dark);
  display: flex; align-items: center; gap: 6px;
  margin-bottom: 10px;
}
.award-tech-block h5 i { color: var(--brand-600); font-size: 12px; }
.award-tech-block ul { display: flex; flex-direction: column; gap: 6px; }
.award-tech-block li {
  font-size: 12px; color: var(--text-muted); line-height: 1.6;
  padding-left: 14px; position: relative;
}
.award-tech-block li::before {
  content: '▸'; position: absolute; left: 0;
  color: #d97706; font-size: 10px; top: 2px;
}

/* Tags */
.award-tags {
  display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px;
}
.award-tags span {
  font-size: 11px; font-weight: 500;
  color: #92400e;
  background: rgba(217,119,6,.08);
  border: 1px solid rgba(217,119,6,.2);
  padding: 3px 10px; border-radius: 5px;
  display: inline-flex; align-items: center; gap: 5px;
}
[data-theme="dark"] .award-tags span {
  color: #fbbf24; background: rgba(217,119,6,.12); border-color: rgba(217,119,6,.3);
}
.award-tags span i { font-size: 11px; }

/* GitHub button */
.award-actions { display: flex; gap: 12px; }
.award-github-btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600;
  color: var(--text-dark); background: var(--bg);
  border: 1.5px solid var(--border);
  padding: 9px 18px; border-radius: var(--radius-sm);
  transition: var(--transition);
}
.award-github-btn:hover {
  border-color: var(--brand-400); color: var(--brand-600);
  background: var(--brand-50); transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* ─────────────────────────────────────────
   CONTACT
───────────────────────────────────────── */
.contact-section { background: var(--surface); border-top: 1px solid var(--border); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.contact-left h3, .contact-right h3 { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 20px; }
.ci-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; }
.ci-item {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 16px; border-radius: var(--radius);
  border: 1.5px solid var(--border); background: var(--bg);
  transition: var(--transition);
}
.ci-item:hover { border-color: var(--brand-400); background: var(--brand-50); }
a.ci-item { cursor: pointer; }
.ci-icon {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  display: grid; place-items: center; color: #fff; font-size: 15px; flex-shrink: 0;
}
.ci-label { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); }
.ci-val { font-size: 14px; font-weight: 500; color: var(--text-dark); word-break: break-all; }

.soc-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.soc-btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 600; color: var(--text);
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  padding: 7px 14px; background: var(--bg); transition: var(--transition);
}
.soc-btn:hover { border-color: var(--brand-400); color: var(--brand-600); background: var(--brand-50); }
.soc-btn i { font-size: 13px; }

/* Form */
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { display: flex; flex-direction: column; gap: 6px; }
.form-field label { font-size: 13px; font-weight: 600; color: var(--text-dark); }
.form-field input, .form-field textarea {
  padding: 10px 14px;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--text-dark);
  font-size: 14px; font-family: inherit;
  transition: var(--transition); outline: none; resize: vertical;
}
.form-field input:focus, .form-field textarea:focus { border-color: var(--brand-400); box-shadow: 0 0 0 3px var(--brand-100); }
.ferr { font-size: 12px; color: var(--rose-500); min-height: 16px; }
.form-check { display: flex; align-items: flex-start; gap: 10px; font-size: 13px; color: var(--text-muted); }
.form-check input { margin-top: 2px; accent-color: var(--brand-600); }
.form-check a { color: var(--brand-600); text-decoration: underline; }
.form-success {
  display: flex; align-items: center; gap: 8px;
  background: rgba(34,197,94,.1); border: 1px solid rgba(34,197,94,.3);
  border-radius: var(--radius-sm); padding: 12px 16px;
  font-size: 14px; color: #16a34a; font-weight: 500;
}
.form-success i { font-size: 16px; }

/* ─────────────────────────────────────────
   FOOTER
───────────────────────────────────────── */
.footer { background: var(--slate-900); color: var(--slate-400); }
.footer-inner {
  padding: 48px 0 32px;
  display: grid; grid-template-columns: 1fr auto auto; gap: 40px; align-items: start;
}
.footer-brand .logo-name { color: #fff; font-weight: 700; font-size: 15px; display: block; margin-bottom: 4px; }
.footer-brand p { font-size: 13px; color: var(--slate-500); }
.footer-nav { display: flex; flex-direction: column; gap: 8px; }
.footer-nav a { font-size: 13px; color: var(--slate-400); transition: var(--transition); }
.footer-nav a:hover { color: #fff; }
.footer-soc { display: flex; gap: 10px; }
.footer-soc a {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  border: 1px solid var(--slate-700); color: var(--slate-400);
  display: grid; place-items: center; font-size: 14px; transition: var(--transition);
}
.footer-soc a:hover { border-color: var(--brand-400); color: var(--brand-400); }
.footer-bottom { border-top: 1px solid var(--slate-800); padding: 16px 24px; text-align: center; font-size: 12px; color: var(--slate-600); }

/* ─────────────────────────────────────────
   BACK TO TOP
───────────────────────────────────────── */
.btt-btn {
  position: fixed; bottom: 24px; right: 24px; z-index: 999;
  width: 44px; height: 44px; border-radius: var(--radius);
  background: var(--brand-600); color: #fff; border: none;
  display: grid; place-items: center; cursor: pointer;
  font-size: 15px; box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: var(--transition);
}
.btt-btn.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.btt-btn:hover { background: var(--brand-700); transform: translateY(-2px); }

/* ─────────────────────────────────────────
   SCROLL ANIMATIONS
───────────────────────────────────────── */
.fade-up { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ─────────────────────────────────────────
   MOBILE NAV
───────────────────────────────────────── */
@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-menu {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    background: var(--surface); border-bottom: 1px solid var(--border);
    flex-direction: column; padding: 16px 24px 24px;
    transform: translateY(-110%); transition: transform .3s ease;
    z-index: 999; gap: 2px;
  }
  .nav-menu.open { transform: translateY(0); }
  .nav-menu a { padding: 12px 16px; border-radius: var(--radius-sm); display: block; font-size: 15px; }
  .nav-cta { display: none; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-right-col { flex-direction: row; flex-wrap: wrap; gap: 10px; }
  .hero-photo-card { width: 100%; max-width: 260px; margin: 0 auto; }
  .hstat-card { flex: 1; min-width: 120px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-metrics { grid-template-columns: 1fr 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .rc-achievements { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .form-row-2 { grid-template-columns: 1fr; }
  .comp-section { padding: 24px; }
  .research-card { padding: 24px; }
  .rc-header { flex-direction: column; }
  .exp-card { grid-template-columns: 40px 1fr; gap: 0 16px; }
  .exp-icon-wrap { width: 36px; height: 36px; font-size: 14px; border-radius: 9px; }
  .exp-body { padding: 18px 16px; }
  .exp-header { flex-direction: column; gap: 8px; }
  .exp-date { align-self: flex-start; }
  /* Award card */
  .award-card { grid-template-columns: 1fr; }
  .award-left { flex-direction: row; padding: 24px 28px; justify-content: flex-start; gap: 24px; border-radius: 0; }
  .award-right { padding: 24px 20px; }
  .award-metrics { grid-template-columns: 1fr 1fr; }
  .award-tech-grid { grid-template-columns: 1fr; }
}

@media (max-width: 1024px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .rc-achievements { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .hero-heading { font-size: 36px; }
  .hero-chips { gap: 6px; }
  .about-metrics { grid-template-columns: 1fr; }
  .rc-achievements { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .award-metrics { grid-template-columns: 1fr 1fr; }
  .award-left { flex-direction: column; align-items: center; padding: 24px; }
}

/* ─────────────────────────────────────────
   CERTIFICATIONS
───────────────────────────────────────── */
.certs-section { background: var(--bg); }
.certs-section .projects-grid { margin-top: 40px; }