/* ===========================
   VARIABLES
   =========================== */
:root {
  --bg:            #080c14;
  --bg-card:       rgba(18, 24, 38, 0.75);
  --bg-card-solid: #111828;
  --sidebar-w:     235px;
  --accent:        #00d4ff;
  --accent-2:      #7b61ff;
  --accent-dim:    rgba(0,212,255,0.12);
  --accent-glow:   rgba(0,212,255,0.10);
  --text:          #e2e8f0;
  --text-muted:    #8892a4;
  --border:        rgba(255,255,255,0.07);
  --border-glow:   rgba(0,212,255,0.28);
  --glass:         rgba(255,255,255,0.04);
  --glass-border:  rgba(255,255,255,0.08);
  --font-display:  'Georgia', 'Times New Roman', serif;
  --font-mono:     'Courier New', 'Lucida Console', monospace;
  --radius:        12px;
  --radius-lg:     18px;
  --t:             0.25s ease;
  --shadow-card:   0 4px 24px rgba(0,0,0,0.4), 0 1px 0 rgba(255,255,255,0.04) inset;
  --shadow-hover:  0 8px 40px rgba(0,0,0,0.5), 0 0 0 1px rgba(0,212,255,0.2);
  --shadow-glow:   0 0 40px rgba(0,212,255,0.14), 0 8px 32px rgba(0,0,0,0.45);
}

/* ===========================
   RESET
   =========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
  line-height: 1.7;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { list-style: none; }
em { font-style: italic; }

/* Ambient orbs */
body::before {
  content: '';
  position: fixed;
  top: -15%; left: 35%;
  width: 580px; height: 580px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,212,255,0.055) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: orbFloat 14s ease-in-out infinite alternate;
}
body::after {
  content: '';
  position: fixed;
  bottom: -10%; right: 8%;
  width: 480px; height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(123,97,255,0.055) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: orbFloat 18s ease-in-out infinite alternate-reverse;
}
@keyframes orbFloat {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(28px,-18px) scale(1.07); }
}

/* ===========================
   SHELL
   =========================== */
.shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  height: 100vh;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

/* ===========================
   SIDEBAR
   =========================== */
.sidebar {
  display: flex;
  flex-direction: column;
  background: rgba(7, 10, 20, 0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-right: 1px solid var(--glass-border);
  overflow-y: auto;
  overflow-x: hidden;
  height: 100vh;
  position: relative;
  z-index: 10;
  box-shadow: 4px 0 36px rgba(0,0,0,0.35);
}
.sidebar-top {
  padding: 28px 18px 22px;
  border-bottom: 1px solid var(--glass-border);
  text-align: center;
  background: linear-gradient(180deg, rgba(0,212,255,0.04) 0%, transparent 100%);
}

/* Avatar */
.avatar-ring {
  width: 82px; height: 82px;
  border-radius: 50%;
  border: 2px solid transparent;
  background:
    linear-gradient(#090e1c, #090e1c) padding-box,
    linear-gradient(135deg, var(--accent), var(--accent-2)) border-box;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px;
  box-shadow:
    0 0 0 4px rgba(0,212,255,0.07),
    0 0 28px rgba(0,212,255,0.18),
    0 6px 20px rgba(0,0,0,0.45);
  overflow: hidden;
  flex-shrink: 0;
  transition: box-shadow 0.4s ease;
}
.avatar-ring:hover {
  box-shadow:
    0 0 0 5px rgba(0,212,255,0.14),
    0 0 44px rgba(0,212,255,0.28),
    0 8px 24px rgba(0,0,0,0.55);
}
.avatar-ring span {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}
.avatar-ring.large {
  width: 124px; height: 124px;
  margin-bottom: 18px;
  box-shadow:
    0 0 0 5px rgba(0,212,255,0.08),
    0 0 44px rgba(0,212,255,0.22),
    0 10px 36px rgba(0,0,0,0.55);
}
.avatar-ring.large span { font-size: 2.2rem; }

.sidebar-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 3px;
  letter-spacing: 0.01em;
}
.sidebar-role { font-size: 0.7rem; color: var(--text-muted); line-height: 1.5; margin-bottom: 6px; }
.sidebar-loc  { font-size: 0.67rem; color: var(--text-muted); }

/* Nav */
.sidebar-nav {
  flex: 1;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  background: none;
  border: none;
  border-radius: 10px;
  color: var(--text-muted);
  font-size: 0.83rem;
  cursor: pointer;
  text-align: left;
  transition: color var(--t), transform var(--t), background var(--t);
  position: relative;
  overflow: hidden;
}
.nav-btn::before {
  content: '';
  position: absolute; inset: 0;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--accent-dim), transparent);
  opacity: 0;
  transition: opacity var(--t);
}
.nav-btn:hover { color: var(--text); transform: translateX(2px); }
.nav-btn:hover::before { opacity: 0.55; }
.nav-btn.active { color: var(--accent); font-weight: 600; }
.nav-btn.active::before { opacity: 1; }
.nav-btn.active::after {
  content: '';
  position: absolute;
  left: 0; top: 22%; bottom: 22%;
  width: 3px;
  border-radius: 0 2px 2px 0;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(0,212,255,0.7);
}
.ni { font-size: 0.95rem; width: 20px; text-align: center; flex-shrink: 0; }

/* Sidebar bottom */
.sidebar-bottom {
  padding: 14px;
  border-top: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.btn-cv {
  width: 100%;
  background: transparent;
  border: 1px solid rgba(0,212,255,0.32);
  color: var(--accent);
  padding: 8px 0;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  transition: background var(--t), color var(--t), box-shadow var(--t), border-color var(--t);
  text-align: center;
  display: block;
  text-decoration: none;
}
.btn-cv:hover {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
  box-shadow: 0 0 22px rgba(0,212,255,0.32);
  text-decoration: none;
}

/* Topbar (mobile) */
.topbar {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  height: 52px;
  background: rgba(7,10,20,0.92);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.burger { background: none; border: none; color: var(--text); font-size: 1.3rem; cursor: pointer; }
.topbar-title { font-size: 0.9rem; color: var(--accent); font-weight: 600; }
.btn-cv-sm {
  background: transparent;
  border: 1px solid rgba(0,212,255,0.32);
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.7rem;
  text-decoration: none;
  display: inline-block;
}
.topbar-cv { display: flex; gap: 6px; align-items: center; }

/* ===========================
   MAIN
   =========================== */
.main {
  position: relative;
  overflow-y: auto;
  overflow-x: hidden;
  height: 100vh;
}
.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(0,212,255,0.016) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,212,255,0.016) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 100%);
}

/* ===========================
   TABS
   =========================== */
.tab {
  display: none;
  padding: 42px 50px;
  min-height: 100vh;
  position: relative;
  z-index: 1;
  animation: fadeUp 0.3s cubic-bezier(0.22,1,0.36,1) both;
}
.tab.active { display: block; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===========================
   PAGE TITLE
   =========================== */
.page-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 36px;
  position: relative;
  display: inline-block;
  letter-spacing: -0.01em;
}
.page-title::after {
  content: '';
  position: absolute;
  bottom: -8px; left: 0;
  width: 36px; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 2px;
  box-shadow: 0 0 12px rgba(0,212,255,0.5);
}
.section-gap { margin-top: 56px; }

/* ===========================
   DASHBOARD HERO
   =========================== */
.dash-hero {
  display: flex;
  align-items: center;
  gap: 44px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}
.dash-hero-text { flex: 1; min-width: 280px; }

.pre-label {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  margin-bottom: 8px;
  opacity: 0.85;
}

.dash-name {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.06;
  background: linear-gradient(130deg, #fff 25%, #b8edff 58%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
  filter: drop-shadow(0 0 32px rgba(0,212,255,0.18));
}

.dash-role {
  font-size: 0.77rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.dash-role::before {
  content: '';
  display: inline-block;
  width: 20px; height: 1px;
  background: var(--accent);
  opacity: 0.5;
}

.dash-tagline {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--accent);
  border-left: 2px solid var(--accent);
  padding-left: 14px;
  margin-bottom: 16px;
  line-height: 1.6;
  text-shadow: 0 0 24px rgba(0,212,255,0.28);
}

.dash-intro {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
  max-width: 480px;
  line-height: 1.78;
}

.dash-cta { display: flex; gap: 12px; flex-wrap: wrap; }

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #009cc0 100%);
  color: #000;
  padding: 11px 28px;
  border: none;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.87rem;
  cursor: pointer;
  transition: transform var(--t), box-shadow var(--t);
  box-shadow: 0 4px 22px rgba(0,212,255,0.38);
  letter-spacing: 0.02em;
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 10px 36px rgba(0,212,255,0.52); }

.btn-ghost {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text);
  padding: 11px 28px;
  border-radius: 10px;
  font-size: 0.87rem;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: border-color var(--t), color var(--t), background var(--t), box-shadow var(--t);
}
.btn-ghost:hover {
  border-color: var(--border-glow);
  color: var(--accent);
  background: var(--accent-dim);
  box-shadow: 0 4px 20px rgba(0,212,255,0.15);
}

/* Terminal */
.hero-terminal {
  width: 330px;
  flex-shrink: 0;
  background: rgba(5, 8, 16, 0.82);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(255,255,255,0.04) inset,
    0 28px 72px rgba(0,0,0,0.55),
    0 0 44px rgba(0,212,255,0.09);
  backdrop-filter: blur(14px);
}
.terminal-bar {
  background: rgba(255,255,255,0.035);
  padding: 9px 14px;
  display: flex; gap: 7px; align-items: center;
  border-bottom: 1px solid var(--glass-border);
}
.terminal-bar span { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; box-shadow: 0 0 7px rgba(255,95,87,0.55); }
.terminal-bar span:nth-child(2) { background: #febc2e; box-shadow: 0 0 7px rgba(254,188,46,0.45); }
.terminal-bar span:nth-child(3) { background: #28c840; box-shadow: 0 0 7px rgba(40,200,64,0.45); }
.terminal-body {
  padding: 18px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: #8faab5;
  min-height: 200px;
  line-height: 1.95;
  overflow: hidden;
}
.t-cmd { color: var(--accent); text-shadow: 0 0 10px rgba(0,212,255,0.4); }
.t-out { color: #5d7a87; }
.t-hi  { color: #28c840; text-shadow: 0 0 10px rgba(40,200,64,0.38); }

/* ===========================
   STATS
   =========================== */
.dash-stats {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.stat-card {
  flex: 1;
  min-width: 105px;
  background: var(--bg-card);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 18px 14px;
  text-align: center;
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.35), transparent);
}
.stat-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border-color: var(--border-glow); }
.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 6px;
  text-shadow: 0 0 22px rgba(0,212,255,0.45);
}
.stat-label { font-size: 0.67rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.07em; }

/* Quick cards */
.dash-quickrow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
}
.dash-qcard {
  background: var(--bg-card);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
  box-shadow: var(--shadow-card);
}
.dash-qcard::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.22), transparent);
}
.dash-qcard:hover { border-color: var(--border-glow); transform: translateY(-5px); box-shadow: var(--shadow-glow); }
.dq-icon { font-size: 1.5rem; margin-bottom: 10px; display: block; }
.dq-title { font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 5px; }
.dq-val { font-size: 0.88rem; color: #fff; font-weight: 600; margin-bottom: 4px; }
.dq-sub { font-size: 0.76rem; color: var(--text-muted); }
.dq-arrow { position: absolute; top: 18px; right: 18px; color: var(--accent); font-size: 1rem; opacity: 0; transition: opacity var(--t), transform var(--t); }
.dash-qcard:hover .dq-arrow { opacity: 1; transform: translateX(3px); }

/* ===========================
   ABOUT
   =========================== */
.about-grid { display: grid; grid-template-columns: 205px 1fr; gap: 44px; align-items: start; }
.about-left { display: flex; flex-direction: column; align-items: center; gap: 14px; }
.avatar-badges { display: flex; flex-direction: column; gap: 6px; width: 100%; }
.badge {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 0.73rem;
  color: var(--text-muted);
  width: 100%;
  text-align: center;
  backdrop-filter: blur(8px);
  transition: border-color var(--t), color var(--t);
}
.badge:hover { border-color: rgba(0,212,255,0.28); color: var(--text); }
.about-links { display: flex; flex-direction: column; gap: 6px; width: 100%; }
.about-links a {
  display: block;
  text-align: center;
  font-size: 0.76rem;
  color: var(--accent);
  border: 1px solid rgba(0,212,255,0.18);
  border-radius: 8px;
  padding: 6px 0;
  transition: background var(--t), box-shadow var(--t), border-color var(--t);
}
.about-links a:hover {
  background: var(--accent-dim);
  border-color: rgba(0,212,255,0.4);
  box-shadow: 0 0 14px rgba(0,212,255,0.12);
  text-decoration: none;
}
.interests-col { width: 100%; display: flex; flex-direction: column; gap: 6px; }
.interests-heading { font-size: 0.67rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 4px; }
.interests-col span { font-size: 0.78rem; color: var(--text-muted); line-height: 1.75; }
.about-text p { color: var(--text-muted); margin-bottom: 14px; font-size: 0.92rem; line-height: 1.8; }
.philosophy-box {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 18px 22px;
  margin-top: 20px;
  box-shadow: var(--shadow-card), inset 0 0 30px rgba(0,212,255,0.02);
}
.philosophy-q {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent);
  font-style: italic;
  margin-bottom: 10px;
  text-shadow: 0 0 22px rgba(0,212,255,0.22);
}
.philosophy-box p { color: var(--text-muted); font-size: 0.88rem; margin-bottom: 0; line-height: 1.75; }

/* ===========================
   TIMELINE
   =========================== */
.timeline { position: relative; padding-left: 28px; max-width: 720px; }
.timeline::before {
  content: '';
  position: absolute;
  left: 7px; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--accent) 0%, rgba(0,212,255,0.08) 100%);
}
.timeline-item { position: relative; margin-bottom: 22px; }
.tl-dot {
  position: absolute;
  left: -23px; top: 10px;
  width: 13px; height: 13px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg);
  box-shadow: 0 0 12px rgba(0,212,255,0.45);
}
.timeline-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 18px 22px;
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.timeline-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.22), transparent);
}
.timeline-card:hover { border-color: var(--border-glow); transform: translateX(5px); box-shadow: var(--shadow-hover); }
.tl-year { font-family: var(--font-mono); color: var(--accent); font-size: 0.72rem; letter-spacing: 0.05em; }
.timeline-card h3 { color: #fff; margin: 6px 0 4px; font-size: 0.97rem; font-weight: 600; }
.tl-org { color: var(--text-muted); font-size: 0.85rem; }
.tl-detail { color: var(--text-muted); font-size: 0.85rem; margin-top: 6px; }
.tl-detail strong { color: var(--accent); }

/* UGC NET badge */
.ugc-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 9px;
  background: linear-gradient(135deg, rgba(123,97,255,0.14), rgba(0,212,255,0.10));
  border: 1px solid rgba(123,97,255,0.38);
  border-radius: 20px;
  padding: 4px 13px 4px 9px;
  font-size: 0.71rem;
  color: #c4b5fd;
  font-weight: 600;
  letter-spacing: 0.03em;
  box-shadow: 0 0 14px rgba(123,97,255,0.18);
}
.ugc-badge::before { content: '✦'; color: #a78bfa; font-size: 0.58rem; }

/* PhD intent card */
.phd-card {
  max-width: 720px;
  margin-top: 22px;
  padding: 18px 22px;
  background: linear-gradient(135deg, rgba(123,97,255,0.08), rgba(0,212,255,0.05));
  border: 1px solid rgba(123,97,255,0.22);
  border-radius: var(--radius);
  display: flex;
  align-items: flex-start;
  gap: 14px;
  box-shadow: 0 4px 28px rgba(123,97,255,0.12);
  backdrop-filter: blur(12px);
}
.phd-icon { font-size: 1.6rem; flex-shrink: 0; margin-top: 2px; }
.phd-card h4 { color: #c4b5fd; font-size: 0.79rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 4px; }
.phd-card p { color: var(--text-muted); font-size: 0.87rem; line-height: 1.65; margin: 0; }
.phd-card strong { color: #e0d9ff; }

/* Workshops */
.workshop-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; }
.workshop-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
  text-align: center;
  box-shadow: var(--shadow-card);
}
.workshop-card:hover { border-color: var(--border-glow); transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.ws-icon { font-size: 1.8rem; display: block; margin-bottom: 10px; }
.workshop-card h4 { color: #fff; font-size: 0.86rem; margin-bottom: 6px; }
.workshop-card p { color: var(--text-muted); font-size: 0.75rem; line-height: 1.5; }

/* ===========================
   EXPERIENCE
   =========================== */
.exp-list { display: flex; flex-direction: column; gap: 18px; max-width: 820px; }
.exp-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.exp-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.18), transparent);
}
.exp-card:hover { border-color: var(--border-glow); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
.exp-header h3 { color: #fff; font-size: 1rem; font-weight: 600; }
.exp-org { color: var(--accent); font-size: 0.83rem; margin-top: 3px; }
.exp-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  padding: 3px 11px;
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  white-space: nowrap;
  background: var(--glass);
  backdrop-filter: blur(6px);
}
.exp-points li {
  color: var(--text-muted);
  font-size: 0.87rem;
  padding: 3px 0 3px 16px;
  position: relative;
  line-height: 1.65;
}
.exp-points li::before { content: '›'; position: absolute; left: 0; color: var(--accent); font-size: 1.1rem; line-height: 1.4; }

/* ===========================
   SKILLS
   =========================== */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.skill-group {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.skill-group::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.15), transparent);
}
.skill-group:hover { border-color: var(--border-glow); transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.skill-group-title { font-size: 0.88rem; color: #fff; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; font-weight: 600; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.tag {
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.14);
  color: var(--accent);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 0.73rem;
  transition: background var(--t), border-color var(--t), box-shadow var(--t);
}
.tag:hover { background: rgba(0,212,255,0.12); border-color: rgba(0,212,255,0.36); box-shadow: 0 0 8px rgba(0,212,255,0.12); }

/* ===========================
   PROJECTS
   =========================== */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.project-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex; flex-direction: column;
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.2), transparent);
}
.project-card:hover { border-color: var(--border-glow); transform: translateY(-6px); box-shadow: var(--shadow-glow); }
.project-num { font-family: var(--font-mono); font-size: 1.8rem; font-weight: 700; color: rgba(0,212,255,0.09); line-height: 1; margin-bottom: 10px; transition: color var(--t); }
.project-card:hover .project-num { color: rgba(0,212,255,0.18); }
.project-card h3 { color: #fff; font-size: 0.94rem; margin-bottom: 10px; font-weight: 600; }
.project-card p { color: var(--text-muted); font-size: 0.85rem; flex: 1; margin-bottom: 14px; line-height: 1.7; }
.project-footer { border-top: 1px solid var(--glass-border); padding-top: 12px; }
.project-tech { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 7px; }
.project-tech span {
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.12);
  color: var(--accent);
  padding: 2px 9px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-family: var(--font-mono);
}
.project-skills { color: var(--text-muted); font-size: 0.71rem; }

/* ===========================
   RESEARCH
   =========================== */
.pub-list { display: flex; flex-direction: column; gap: 18px; max-width: 820px; }
.pub-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex; gap: 18px;
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.pub-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.16), transparent);
}
.pub-card:hover { border-color: var(--border-glow); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.pub-badge {
  font-family: var(--font-mono);
  background: linear-gradient(135deg, var(--accent), #0095b8);
  color: #000;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  align-self: flex-start;
  white-space: nowrap;
  box-shadow: 0 0 16px rgba(0,212,255,0.28);
}
.pub-body h3 { color: #fff; font-size: 0.94rem; margin-bottom: 8px; font-weight: 600; }
.pub-body p { color: var(--text-muted); font-size: 0.87rem; margin-bottom: 12px; line-height: 1.7; }
.pub-meta { display: flex; flex-wrap: wrap; gap: 14px; }
.pub-meta span { color: var(--text-muted); font-size: 0.74rem; }

/* ===========================
   CONTACT
   =========================== */
.contact-intro { color: var(--text-muted); margin-bottom: 28px; font-size: 0.92rem; }
.contact-grid { display: flex; flex-wrap: wrap; gap: 13px; }
.contact-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 18px 22px;
  display: flex; align-items: center; gap: 14px;
  color: var(--text);
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
  min-width: 200px;
  flex: 1;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.contact-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.15), transparent);
}
.contact-card:hover { border-color: var(--border-glow); transform: translateY(-3px); box-shadow: var(--shadow-glow); text-decoration: none; }
.contact-card.no-link:hover { cursor: default; transform: none; box-shadow: var(--shadow-card); border-color: var(--glass-border); }
.contact-icon { font-size: 1.4rem; }
.contact-label { font-size: 0.67rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 2px; }
.contact-value { font-size: 0.84rem; color: var(--text); }

/* ===========================
   PROFILE PHOTO
   =========================== */
.avatar-photo {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  display: block;
  flex-shrink: 0;
}
.avatar-ring.large .avatar-photo {
  width: 124px;
  height: 124px;
}

/* ===========================
   CV BUTTONS
   =========================== */
a.btn-cv {
  display: block;
  text-align: center;
  text-decoration: none;
  line-height: normal;
  margin-bottom: 8px;
}
a.btn-cv:last-child { margin-bottom: 0; }
a.btn-cv:hover { text-decoration: none; }
.topbar-cv { display: flex; gap: 6px; align-items: center; }

/* ===========================
   MOBILE
   =========================== */
@media (max-width: 768px) {
  html, body { overflow: auto; height: auto; }
  body::before, body::after { display: none; }
  .shell { display: flex; flex-direction: column; height: auto; min-height: 100vh; }
  .sidebar {
    position: fixed;
    top: 52px; left: -100%;
    width: 240px;
    height: calc(100vh - 52px);
    transition: left 0.3s ease;
    z-index: 50;
  }
  .sidebar.open { left: 0; }
  .topbar { display: flex; }
  .main { height: auto; overflow: visible; }
  .tab { padding: 24px 18px; min-height: auto; }
  .dash-hero { gap: 24px; }
  .hero-terminal { width: 100%; }
  .about-grid { grid-template-columns: 1fr; }
  .about-left { flex-direction: row; flex-wrap: wrap; align-items: flex-start; }
}

/* ===========================
   PRINT
   =========================== */
@media print {
  :root {
    --bg: #fff; --bg-card: rgba(245,247,250,1);
    --text: #111; --text-muted: #444;
    --accent: #0070a8; --glass-border: #d0d5dd;
  }
  html, body { overflow: auto; height: auto; }
  body::before, body::after { display: none; }
  .shell { display: block; height: auto; }
  .sidebar, .topbar, .bg-grid, .hero-terminal, .dash-cta, .btn-cv, .btn-cv-sm, .dash-stats, .dash-quickrow { display: none !important; }
  .main { height: auto; overflow: auto; }
  .tab { display: block !important; padding: 16px 0; page-break-inside: avoid; backdrop-filter: none !important; }
  .dash-name { -webkit-text-fill-color: #111 !important; background: none !important; color: #111 !important; font-size: 2rem; filter: none; }
  .dash-role, .dash-tagline, .dash-intro { color: #444 !important; }
  .page-title { font-size: 1.3rem; border-bottom: 1px solid #ccc; padding-bottom: 4px; margin-bottom: 16px; }
  .page-title::after { display: none; }
  * { box-shadow: none !important; transform: none !important; backdrop-filter: none !important; }
  a { color: #0070a8; }
  @page { margin: 14mm 18mm; }
}

/* ===========================
   WHAT MAKES ME DIFFERENT
   =========================== */
.diff-section {
  margin-top: 52px;
  padding-top: 48px;
  border-top: 1px solid var(--glass-border);
  position: relative;
}
.diff-section::before {
  content: '';
  position: absolute;
  top: -1px; left: 0;
  width: 80px; height: 1px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px rgba(0,212,255,0.5);
}

.diff-header {
  margin-bottom: 36px;
}
.diff-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  opacity: 0.75;
  display: block;
  margin-bottom: 8px;
}
.diff-title {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}
.diff-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
  max-width: 500px;
  line-height: 1.6;
}

/* Split layout */
.diff-split {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 28px;
  align-items: start;
}

/* Left — traits */
.diff-traits {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.diff-trait {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
}
.diff-trait::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.18), transparent);
}
.diff-trait:hover {
  border-color: var(--border-glow);
  transform: translateX(5px);
  box-shadow: var(--shadow-hover);
}
.dt-icon-wrap {
  width: 42px; height: 42px;
  flex-shrink: 0;
  border-radius: 10px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  transition: background var(--t), border-color var(--t);
}
.diff-trait:hover .dt-icon-wrap {
  background: var(--accent-dim);
  border-color: rgba(0,212,255,0.3);
}
.dt-content h4 {
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 5px;
  line-height: 1.3;
}
.dt-content p {
  color: var(--text-muted);
  font-size: 0.83rem;
  line-height: 1.65;
  margin-bottom: 8px;
}
.dt-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(0,212,255,0.18);
  border-radius: 20px;
  padding: 2px 10px;
  letter-spacing: 0.04em;
}

/* Right — compare panel */
.diff-compare {
  background: var(--bg-card);
  backdrop-filter: blur(18px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  position: sticky;
  top: 20px;
}
.diff-compare-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-bottom: 18px;
  opacity: 0.7;
}
.diff-vs {
  display: grid;
  grid-template-columns: 1fr 28px 1fr;
  gap: 0;
  align-items: stretch;
}
.diff-col { padding: 0 4px; }
.diff-col-head {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 14px;
}
.diff-col-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.dot-green { background: #22c55e; box-shadow: 0 0 6px rgba(34,197,94,0.5); }
.dot-amber { background: #f59e0b; box-shadow: 0 0 6px rgba(245,158,11,0.4); }
.diff-col ul { display: flex; flex-direction: column; gap: 9px; }
.diff-col li {
  font-size: 0.78rem;
  line-height: 1.4;
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.diff-col-me li { color: #d1fae5; }
.diff-col-site li { color: var(--text-muted); }
.check { color: #22c55e; font-size: 0.6rem; flex-shrink: 0; }
.cross { color: #f59e0b; font-size: 0.9rem; flex-shrink: 0; line-height: 1; }
.diff-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.diff-vs-label {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.62rem;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 0;
}
.diff-note {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--glass-border);
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.6;
  font-style: italic;
}

/* ===========================
   RESPONSIVE OVERHAUL
   =========================== */

/* Large screens — give sidebar more breathing room */
@media (min-width: 1400px) {
  :root { --sidebar-w: 250px; }
  .tab { padding: 48px 64px; }
  .diff-split { grid-template-columns: 1fr 420px; }
}

/* Medium — tighten */
@media (max-width: 1100px) {
  .tab { padding: 36px 32px; }
  .diff-split { grid-template-columns: 1fr; }
  .diff-compare { position: static; }
  .diff-vs { grid-template-columns: 1fr 24px 1fr; }
}

/* Tablet */
@media (max-width: 900px) {
  :root { --sidebar-w: 210px; }
  .tab { padding: 28px 24px; }
  .about-grid { grid-template-columns: 175px 1fr; gap: 28px; }
  .dash-hero { gap: 28px; }
  .hero-terminal { width: 280px; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .projects-grid { grid-template-columns: 1fr 1fr; }
  .dash-quickrow { grid-template-columns: 1fr 1fr; }
}

/* Mobile — full redesign */
@media (max-width: 768px) {
  html, body { overflow: auto; height: auto; }
  body::before, body::after { display: none; }

  .shell {
    display: flex;
    flex-direction: column;
    height: auto;
    min-height: 100vh;
  }

  /* Sidebar becomes slide-in drawer */
  .sidebar {
    position: fixed;
    top: 52px; left: -100%;
    width: min(280px, 85vw);
    height: calc(100vh - 52px);
    transition: left 0.3s cubic-bezier(0.22,1,0.36,1);
    z-index: 50;
    box-shadow: 8px 0 40px rgba(0,0,0,0.5);
  }
  .sidebar.open { left: 0; }
  .topbar { display: flex; }

  .main { height: auto; overflow: visible; }
  .tab { padding: 24px 18px; min-height: auto; }

  /* Dashboard */
  .dash-hero {
    flex-direction: column;
    gap: 24px;
    align-items: flex-start;
  }
  .hero-terminal { width: 100%; min-width: 0; }
  .dash-stats { gap: 10px; }
  .stat-card { min-width: 80px; padding: 14px 10px; }
  .stat-num { font-size: 1.6rem; }
  .dash-quickrow { grid-template-columns: 1fr 1fr; gap: 10px; }
  .dq-val { font-size: 0.8rem; }

  /* About */
  .about-grid { grid-template-columns: 1fr; gap: 28px; }
  .about-left {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 16px;
  }
  .avatar-ring.large { width: 90px; height: 90px; margin-bottom: 0; }
  .avatar-ring.large .avatar-photo { width: 90px; height: 90px; }

  /* Diff section on mobile */
  .diff-split { grid-template-columns: 1fr; gap: 20px; }
  .diff-compare { position: static; }
  .diff-vs { grid-template-columns: 1fr 22px 1fr; }
  .diff-col li { font-size: 0.73rem; }
  .diff-trait { flex-direction: row; }

  /* Skills & Projects single col */
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .workshop-grid { grid-template-columns: 1fr 1fr; }

  /* Timeline */
  .timeline { padding-left: 20px; }
  .tl-dot { left: -17px; }

  /* Pub cards */
  .pub-card { flex-direction: column; gap: 12px; }

  /* Contact */
  .contact-grid { flex-direction: column; }
  .contact-card { min-width: 0; flex: none; }

  /* Experience */
  .exp-header { flex-direction: column; align-items: flex-start; }
  .exp-date { align-self: flex-start; }
}

/* Small mobile */
@media (max-width: 480px) {
  .tab { padding: 20px 14px; }
  .dash-name { font-size: 2rem; }
  .page-title { font-size: 1.5rem; }
  .dash-quickrow { grid-template-columns: 1fr; }
  .workshop-grid { grid-template-columns: 1fr; }
  .diff-vs { grid-template-columns: 1fr; gap: 16px; }
  .diff-divider { display: none; }
  .stat-card { min-width: 70px; }
  .hero-terminal { border-radius: var(--radius); }
}