/* ============================================================
   HABEEBAN MEMON — PORTFOLIO v2
   Color: White / Light Purple (Lavender)
   Fonts: DM Serif Display + DM Sans + JetBrains Mono
   ============================================================ */

/* ===================== CSS VARIABLES ===================== */
:root {
  --accent:        #7c5cbf;       /* Medium purple */
  --accent-deep:   #6344a8;
  --accent-dim:    rgba(124,92,191,0.10);
  --accent-glow:   rgba(124,92,191,0.22);
  --radius:        10px;
  --transition:    0.28s ease;
  --max-w:         1080px;
  --font-body:     'DM Sans', sans-serif;
  --font-display:  'DM Serif Display', serif;
  --font-mono:     'JetBrains Mono', monospace;
}

/* LIGHT THEME (default) — White + Light Purple */
[data-theme="light"] {
  --bg:        #ffffff;
  --bg-alt:    #f3eeff;
  --bg-card:   #faf8ff;
  --bg-hover:  #ede5ff;
  --border:    rgba(124,92,191,0.13);
  --border-a:  rgba(124,92,191,0.32);
  --text:      #1e1040;
  --text-sub:  #5a4a7a;
  --text-dim:  #b0a0d0;
  --nav-bg:    rgba(255,255,255,0.93);
  --shadow:    0 4px 24px rgba(124,92,191,0.10);
  --accent:    #7c5cbf;
  --accent-dim:rgba(124,92,191,0.10);
  --accent-glow:rgba(124,92,191,0.22);
}

/* DARK THEME — deep navy/midnight */
[data-theme="dark"] {
  --bg:        #06091a;
  --bg-alt:    #0b0f26;
  --bg-card:   #0f1530;
  --bg-hover:  #141a38;
  --border:    rgba(255,255,255,0.07);
  --border-a:  rgba(124,92,191,0.35);
  --text:      #e8edf8;
  --text-sub:  #9b8fc0;
  --text-dim:  #4a3d70;
  --nav-bg:    rgba(6,9,26,0.90);
  --shadow:    0 4px 30px rgba(0,0,0,0.6);
  --accent:    #a98de6;
  --accent-dim:rgba(169,141,230,0.13);
  --accent-glow:rgba(169,141,230,0.25);
}

/* ===================== RESET ===================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}
a  { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ===================== LAYOUT ===================== */
.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section       { padding: 5rem 0; }
.bg-alt        { background: var(--bg-alt); }

/* Section heading */
.sec-hd { margin-bottom: 3rem; }
.sec-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.sec-hd h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 400;
  color: var(--text);
  line-height: 1.15;
  position: relative;
  padding-bottom: 1rem;
}
.sec-hd h2::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 48px; height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

/* Pills */
.pill {
  display: inline-block;
  padding: 0.18em 0.75em;
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.pill-blue   { background: rgba(124,92,191,0.12); color: #7c5cbf; border: 1px solid rgba(124,92,191,0.30); }
.pill-green  { background: rgba(52,211,153,0.12); color: #1a9e6e; border: 1px solid rgba(52,211,153,0.3); }
.pill-purple { background: rgba(167,139,250,0.14); color: #7c5cbf; border: 1px solid rgba(124,92,191,0.30); }
.pill-gold   { background: rgba(251,191,36,0.12);  color: #b07d08; border: 1px solid rgba(251,191,36,0.3); }

/* Buttons */
.btn-primary {
  display: inline-block;
  padding: 0.7rem 1.8rem;
  background: var(--accent);
  color: #ffffff;
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary:hover {
  background: transparent;
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}
.btn-ghost {
  display: inline-block;
  padding: 0.7rem 1.8rem;
  background: transparent;
  color: var(--text);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-weight: 500;
  font-size: 0.92rem;
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* Inline link */
.inline-a { color: var(--accent); text-decoration: underline; }

/* ===================== NAVBAR ===================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  padding: 1rem 0;
  transition: all 0.35s ease;
}
.navbar.solid {
  background: var(--nav-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 0.7rem 0;
}
.nav-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.nav-brand {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.04em;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.8rem;
}
.nav-links a {
  font-size: 0.86rem;
  color: var(--text-sub);
  transition: color var(--transition);
  position: relative;
  padding-bottom: 2px;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--accent); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.nav-right { display: flex; align-items: center; gap: 0.7rem; }

.theme-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-sub);
  width: 36px; height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem;
  transition: all var(--transition);
  flex-shrink: 0;
}
.theme-btn:hover { border-color: var(--accent); color: var(--accent); }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.burger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-sub);
  border-radius: 2px;
  transition: all 0.3s;
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.mob-menu {
  position: fixed;
  top: 0; right: -300px;
  width: 280px; height: 100%;
  background: var(--bg-card);
  z-index: 1000;
  padding: 5rem 2rem 2rem;
  border-left: 1px solid var(--border);
  transition: right 0.35s cubic-bezier(0.4,0,0.2,1);
}
.mob-menu.open { right: 0; }
.mob-close {
  position: absolute;
  top: 1.2rem; right: 1.2rem;
  background: transparent;
  border: none;
  color: var(--text-sub);
  font-size: 1.1rem;
  cursor: pointer;
}
.mob-menu ul { display: flex; flex-direction: column; gap: 0; }
.mob-menu a {
  display: block;
  padding: 0.9rem 0;
  font-size: 1rem;
  color: var(--text-sub);
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}
.mob-menu a:hover { color: var(--accent); }

.mob-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.mob-backdrop.open { opacity: 1; pointer-events: auto; }

/* ===================== HERO ===================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 7rem 1.5rem 4rem;
  overflow: hidden;
}

/* Background grid */
.hero-grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black, transparent);
  pointer-events: none;
}

/* Orbs */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(80px);
  animation: orbPulse 7s ease-in-out infinite;
}
.orb-a {
  width: 500px; height: 500px;
  top: -150px; right: -100px;
  background: radial-gradient(circle, rgba(124,92,191,0.18), transparent 70%);
}
.orb-b {
  width: 350px; height: 350px;
  bottom: -100px; left: -80px;
  background: radial-gradient(circle, rgba(169,141,230,0.12), transparent 70%);
  animation-delay: -3.5s;
}
@keyframes orbPulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50%       { opacity: 1;   transform: scale(1.08); }
}

/* Hero layout */
.hero-body {
  position: relative;
  z-index: 2;
  max-width: 800px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 2rem;
  animation: fadeUp 0.9s ease both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: none; }
}

/* Avatar */
.avatar-wrap {
  position: relative;
  width: 140px; height: 140px;
}
.avatar {
  width: 140px; height: 140px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-card);
  border: 3px solid var(--border-a);
  position: relative;
  z-index: 1;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%; height: 100%;
  font-size: 3.5rem;
  color: var(--accent);
  background: var(--bg-alt);
}
.avatar-glow {
  position: absolute; inset: -8px;
  border-radius: 50%;
  border: 1px solid var(--border-a);
  opacity: 0.4;
  animation: rotateRing 14s linear infinite;
}
@keyframes rotateRing { to { transform: rotate(360deg); } }

/* Hero text */
.hero-content { display: flex; flex-direction: column; align-items: center; gap: 1rem; }

.hero-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--border-a);
  padding: 0.3em 1.1em;
  border-radius: 20px;
}

/* ============= NAME: SINGLE LINE, SINGLE COLOR ============= */
.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.8rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);          /* ONE consistent color */
  white-space: nowrap;         /* Force single line */
}

/* ============= ROLES: ONE LINE ============= */
.hero-roles {
  font-family: var(--font-mono);
  font-size: clamp(0.7rem, 1.8vw, 0.85rem);
  color: var(--accent);
  letter-spacing: 0.04em;
  white-space: nowrap;         /* One line */
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.hero-bio {
  color: var(--text-sub);
  font-size: 1rem;
  line-height: 1.75;
  max-width: 580px;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-socials { display: flex; gap: 0.65rem; flex-wrap: wrap; justify-content: center; }
.soc-btn {
  width: 40px; height: 40px;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-sub);
  font-size: 0.9rem;
  transition: all var(--transition);
}
.soc-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-2px);
}

/* ===================== ABOUT ===================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}
.about-bio p {
  color: var(--text-sub);
  margin-bottom: 1.1rem;
  font-size: 0.97rem;
}
.about-bio strong { color: var(--text); font-weight: 600; }

.quick-facts { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.5rem; }
.qf {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-sub);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.4rem 0.85rem;
}
.qf i { color: var(--accent); font-size: 0.8rem; }

.side-title {
  font-size: 0.72rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 0.9rem;
}

.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tags span {
  padding: 0.3em 0.8em;
  background: var(--accent-dim);
  border: 1px solid var(--border-a);
  border-radius: 20px;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--accent);
}

.stack { display: flex; flex-direction: column; gap: 0.5rem; }
.stack-row {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  font-size: 0.87rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}
.stack-row:last-child { border-bottom: none; }
.sl {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  min-width: 82px;
  padding-top: 1px;
  flex-shrink: 0;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.sv { color: var(--text-sub); }

/* ===================== EDUCATION ===================== */
.edu-card {
  display: flex;
  gap: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: border-color var(--transition);
}
.edu-card:hover { border-color: var(--border-a); }
.edu-icon-wrap {
  width: 48px; height: 48px;
  border-radius: var(--radius);
  background: var(--accent-dim);
  border: 1px solid var(--border-a);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  color: var(--accent);
  flex-shrink: 0;
}
.edu-body { flex: 1; }
.edu-meta { display: flex; align-items: center; gap: 0.8rem; flex-wrap: wrap; margin-bottom: 0.6rem; }
.edu-date { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-dim); }
.edu-body h3 { font-size: 1.1rem; font-weight: 600; color: var(--text); margin-bottom: 0.4rem; }
.edu-uni {
  font-size: 0.87rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1rem;
}
.edu-uni:hover { text-decoration: underline; }
.edu-stats { display: flex; gap: 2.5rem; flex-wrap: wrap; }
.edu-stat { display: flex; flex-direction: column; gap: 0.15rem; }
.edu-stat span { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; }
.edu-stat strong { font-size: 0.88rem; color: var(--text); }

/* ===================== TIMELINE ===================== */
.timeline { display: flex; flex-direction: column; gap: 0; }
.tl-item {
  display: flex;
  gap: 1.5rem;
  position: relative;
  padding-bottom: 2.5rem;
}
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: '';
  position: absolute;
  left: 7px; top: 20px; bottom: -10px;
  width: 1px;
  background: var(--border);
}
.tl-item:last-child::before { display: none; }
.tl-dot {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  margin-top: 4px;
  box-shadow: 0 0 0 3px var(--accent-dim);
  position: relative; z-index: 1;
}
.tl-body { flex: 1; }
.tl-meta { display: flex; align-items: center; gap: 0.8rem; flex-wrap: wrap; margin-bottom: 0.5rem; }
.tl-date { font-family: var(--font-mono); font-size: 0.73rem; color: var(--text-dim); }
.tl-body h3 { font-size: 1.05rem; font-weight: 600; color: var(--text); margin-bottom: 0.3rem; }
.tl-org { font-size: 0.86rem; color: var(--text-sub); display: flex; align-items: center; gap: 0.4rem; margin-bottom: 0.8rem; }
.tl-org i { font-size: 0.75rem; color: var(--accent); }
.tl-list { display: flex; flex-direction: column; gap: 0.55rem; }
.tl-list li { font-size: 0.87rem; color: var(--text-sub); padding-left: 1.2rem; position: relative; line-height: 1.65; }
.tl-list li::before { content: '›'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* ===================== PROJECTS ===================== */
.proj-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.2rem;
}
.proj-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: all var(--transition);
}
.proj-card:hover {
  border-color: var(--border-a);
  transform: translateY(-4px);
  box-shadow: 0 10px 35px rgba(124,92,191,0.15);
}
/* Featured spans full width */
.proj-card.featured { grid-column: 1 / -1; border-color: var(--border-a); background: var(--bg-hover); }

.proj-header { display: flex; justify-content: space-between; align-items: center; }
.proj-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}
.gh-link { color: var(--text-dim); font-size: 1.1rem; transition: color var(--transition); }
.gh-link:hover { color: var(--accent); }
.proj-card h3 { font-size: 1rem; font-weight: 600; color: var(--text); line-height: 1.4; }
.proj-card p  { font-size: 0.86rem; color: var(--text-sub); line-height: 1.65; flex: 1; }
.proj-tags    { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.proj-tags span {
  padding: 0.2em 0.65em;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-sub);
}

/* ===================== PUBLICATIONS ===================== */
.pub-list { display: flex; flex-direction: column; gap: 1.2rem; }
.pub-card {
  display: flex;
  gap: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem 1.8rem;
  transition: border-color var(--transition);
}
.pub-card:hover { border-color: var(--border-a); }
.pub-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 300;
  color: var(--text-dim);
  line-height: 1;
  flex-shrink: 0;
  width: 36px;
}
.pub-body { flex: 1; display: flex; flex-direction: column; gap: 0.55rem; }
.pub-pill {
  display: inline-block;
  padding: 0.18em 0.8em;
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  width: fit-content;
}
.pub-published { background: rgba(52,211,153,0.12); color: #1a9e6e; border: 1px solid rgba(52,211,153,0.3); }
.pub-accepted  { background: rgba(251,191,36,0.12);  color: #b07d08; border: 1px solid rgba(251,191,36,0.3); }
.pub-prep      { background: rgba(124,92,191,0.12);  color: #7c5cbf; border: 1px solid rgba(124,92,191,0.3); }
.pub-body h3       { font-size: 1rem; font-weight: 600; color: var(--text); line-height: 1.45; }
.pub-authors       { font-size: 0.84rem; color: var(--text-sub); }
.pub-venue         { font-size: 0.81rem; color: var(--text-dim); font-style: italic; display: flex; align-items: center; gap: 0.4rem; }
.pub-summary       { font-size: 0.86rem; color: var(--text-sub); line-height: 1.65; }
.pub-summary strong { color: var(--text); }
.doi-link {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  width: fit-content;
}
.doi-link:hover { text-decoration: underline; }

/* ===================== CERTIFICATIONS ===================== */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.2rem;
}
.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  transition: all var(--transition);
}
.cert-card:hover { border-color: var(--border-a); transform: translateY(-3px); }
.cert-icon { font-size: 1.5rem; color: var(--accent); }
.cert-card h3 { font-size: 0.95rem; font-weight: 600; color: var(--text); line-height: 1.4; }
.cert-issuer { font-family: var(--font-mono); font-size: 0.73rem; color: var(--accent); }
.cert-card p  { font-size: 0.83rem; color: var(--text-sub); line-height: 1.6; }
.cert-link {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.3rem;
  transition: gap var(--transition);
}
.cert-link:hover { gap: 0.65rem; text-decoration: underline; }

/* ===================== CONTACT ===================== */
.contact-intro {
  font-size: 1rem;
  color: var(--text-sub);
  margin-bottom: 2rem;
  max-width: 560px;
}
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 0.9rem;
}
.ccard {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  transition: all var(--transition);
  min-width: 0; /* allow shrink */
}
.ccard:hover { border-color: var(--border-a); transform: translateX(4px); }
.ccard-icon {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 1px solid var(--border-a);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  font-size: 0.95rem;
  flex-shrink: 0;
}
.ccard-text {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0; /* allow text to truncate properly */
}
.ccard-label {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  white-space: nowrap;
}
.ccard-val {
  font-size: 0.87rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===================== FOOTER ===================== */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
}
.footer-inner { max-width: var(--max-w); margin: 0 auto; }
.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.2rem;
}
.footer-brand { display: flex; align-items: center; gap: 1rem; }
.fb-logo {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--border-a);
  width: 44px; height: 44px;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.fb-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--text);
  line-height: 1.2;
}
.fb-sub { font-size: 0.8rem; color: var(--text-sub); }
.footer-links { display: flex; gap: 0.7rem; }
.footer-links a {
  width: 36px; height: 36px;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-sub);
  font-size: 0.85rem;
  transition: all var(--transition);
}
.footer-links a:hover { border-color: var(--accent); color: var(--accent); }
.footer-bottom p {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  text-align: center;
}

/* ===================== BACK TO TOP ===================== */
.back-top {
  position: fixed;
  bottom: 1.8rem; right: 1.8rem;
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition);
  z-index: 800;
  box-shadow: 0 4px 16px var(--accent-glow);
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { transform: translateY(-3px); }

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

  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .pub-card   { flex-direction: column; gap: 0.8rem; }
  .pub-num    { font-size: 1.2rem; width: auto; }
}

@media (max-width: 640px) {
  .section { padding: 3.5rem 0; }
  .hero    { padding: 5.5rem 1.2rem 3rem; }

  /* On mobile, allow name to wrap if truly needed, but still single color */
  .hero-name  { white-space: normal; font-size: clamp(2.2rem, 10vw, 3.5rem); }
  .hero-roles { white-space: normal; font-size: 0.72rem; line-height: 1.6; }

  .hero-cta      { flex-direction: column; width: 100%; }
  .hero-cta a    { text-align: center; }

  .proj-grid     { grid-template-columns: 1fr; }
  .featured      { grid-column: auto; }
  .cert-grid     { grid-template-columns: 1fr; }
  .contact-grid  { grid-template-columns: 1fr; }
  .ccard-val     { font-size: 0.8rem; }

  .edu-card { flex-direction: column; }
  .edu-stats { gap: 1.2rem; }

  .footer-top { flex-direction: column; align-items: flex-start; }
}

/* Accessibility */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}