/* ================================================================
   VANSHAJ ARORA PORTFOLIO — Apple Glass × Atharva-style UI
   ================================================================ */

:root {
  --bg:         #060a14;
  --bg2:        #0b1121;
  --bg3:        #10182e;
  --glow-1:     rgba(100,155,255,.14);
  --glow-2:     rgba(88,230,217,.09);
  --text:       #e4eaf6;
  --muted:      #7d8fb3;
  --primary:    #6c9bff;
  --secondary:  #58e6d9;
  --accent:     #a78bfa;
  --glass:      rgba(255,255,255,0.05);
  --glass2:     rgba(255,255,255,0.03);
  --glass-h:    rgba(255,255,255,0.08);
  --border:     rgba(255,255,255,0.08);
  --border-h:   rgba(255,255,255,0.14);
  --shadow:     0 24px 72px rgba(0,0,0,0.6);
  --shadow-sm:  0 8px 32px rgba(0,0,0,0.4);
  --nav-bg:     rgba(6,10,20,.6);
  --nav-bg-sc:  rgba(6,10,20,.88);
  --btn-on-primary: #060a14;
  --r-lg:       22px;
  --r-md:       14px;
  --r-sm:       10px;
  --r-pill:     999px;
  --ease:       cubic-bezier(.4,0,.2,1);
  --t:          .28s var(--ease);
}

html[data-theme="light"] {
  --bg:         #f3f7ff;
  --bg2:        #edf3ff;
  --bg3:        #e8f0ff;
  --glow-1:     rgba(108,155,255,.2);
  --glow-2:     rgba(88,230,217,.16);
  --text:       #13233d;
  --muted:      #5b6f8f;
  --primary:    #3f74ff;
  --secondary:  #12b4ad;
  --accent:     #7c5cff;
  --glass:      rgba(255,255,255,0.68);
  --glass2:     rgba(255,255,255,0.52);
  --glass-h:    rgba(255,255,255,0.82);
  --border:     rgba(45,78,141,0.14);
  --border-h:   rgba(45,78,141,0.24);
  --shadow:     0 18px 52px rgba(35,58,103,0.14);
  --shadow-sm:  0 8px 24px rgba(35,58,103,0.1);
  --nav-bg:     rgba(243,247,255,.78);
  --nav-bg-sc:  rgba(243,247,255,.93);
  --btn-on-primary: #ffffff;
}

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

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 60% at 15% 0%,  var(--glow-1) 0%, transparent 55%),
    radial-gradient(ellipse 60% 50% at 85% 100%, var(--glow-2) 0%, transparent 50%),
    linear-gradient(155deg, var(--bg) 0%, var(--bg2) 50%, var(--bg3) 100%);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background-color .35s var(--ease), color .35s var(--ease);
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; }

/* ── SCROLL PROGRESS ───────────────────────────────────────────── */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 2.5px; width: 0%; z-index: 300;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  box-shadow: 0 0 20px rgba(108,155,255,.7);
}

/* ── CURSOR GLOW ───────────────────────────────────────────────── */
.cursor-glow {
  position: fixed; width: 280px; height: 280px; border-radius: 50%;
  pointer-events: none; z-index: 0;
  background: radial-gradient(circle, rgba(108,155,255,.18) 0%, rgba(108,155,255,.03) 36%, transparent 70%);
  mix-blend-mode: screen; filter: blur(6px);
  transform: translate(-999px,-999px);
  transition: transform .07s linear;
}

/* ── BACKGROUND ────────────────────────────────────────────────── */
.bg-blur {
  position: fixed; border-radius: 50%; filter: blur(110px);
  pointer-events: none; z-index: 0; opacity: .2;
}
.b1 { width: 600px; height: 600px; background: radial-gradient(circle, rgba(100,155,255,.5), transparent 70%); top: -180px; left: -180px; }
.b2 { width: 500px; height: 500px; background: radial-gradient(circle, rgba(88,230,217,.4), transparent 70%); bottom: 60px; right: -120px; }
.b3 { width: 380px; height: 380px; background: radial-gradient(circle, rgba(167,139,250,.35), transparent 70%); top: 45%; left: 50%; transform: translateX(-50%); opacity: .12; }

.particle-overlay {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 12% 24%, rgba(255,255,255,.2) 0%, transparent 100%),
    radial-gradient(1px 1px at 68% 10%, rgba(255,255,255,.17) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 52% 62%, rgba(255,255,255,.12) 0%, transparent 100%),
    radial-gradient(1px 1px at 84% 74%, rgba(255,255,255,.15) 0%, transparent 100%),
    radial-gradient(1px 1px at 30% 92%, rgba(255,255,255,.11) 0%, transparent 100%);
}

/* ── NAVBAR ────────────────────────────────────────────────────── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  display: flex; align-items: center; gap: 0;
  height: 64px; padding: 0 40px;
  background: var(--nav-bg);
  backdrop-filter: blur(24px) saturate(1.5);
  -webkit-backdrop-filter: blur(24px) saturate(1.5);
  border-bottom: 1px solid transparent;
  transition: var(--t);
}
.navbar.scrolled {
  background: var(--nav-bg-sc);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 30px rgba(0,0,0,.5);
}
.nav-logo {
  font-size: 1.1rem; font-weight: 900; letter-spacing: .06em;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-right: auto;
}
.nav-links { display: flex; gap: 8px; margin-right: 20px; }
.nav-links a {
  font-size: .82rem; font-weight: 500; color: var(--muted);
  padding: 6px 14px; border-radius: var(--r-pill);
  transition: var(--t); position: relative;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active {
  color: var(--primary);
  background: rgba(108,155,255,.1);
}
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-cv-btn {
  font-size: .78rem; font-weight: 700; letter-spacing: .04em;
  padding: 8px 20px; border-radius: var(--r-pill);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--btn-on-primary); transition: var(--t);
}
.nav-cv-btn:hover { transform: scale(1.04); box-shadow: 0 4px 20px rgba(108,155,255,.35); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: var(--r-pill);
  border: 1px solid var(--border);
  background: var(--glass2);
  color: var(--text);
  font-size: .78rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--t);
}
.theme-toggle:hover {
  background: var(--glass-h);
  border-color: var(--border-h);
}
.theme-toggle-icon { font-size: .85rem; line-height: 1; }
.theme-toggle-mobile {
  margin-top: 10px;
  justify-content: center;
}

/* hamburger */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text); border-radius: 2px;
  transition: var(--t);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  position: fixed; top: 64px; left: 0; right: 0; z-index: 190;
  display: flex; flex-direction: column;
  background: var(--nav-bg-sc);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px 20px;
  transform: translateY(-110%);
  transition: transform .35s var(--ease);
}
.mobile-nav.open { transform: translateY(0); }
.mobile-nav a {
  padding: 12px 8px; font-size: .92rem; font-weight: 500; color: var(--muted);
  border-bottom: 1px solid var(--border);
  transition: color var(--t);
}
.mobile-nav a:last-child { border: none; }
.mobile-nav a:hover, .mobile-nav a.active { color: var(--primary); }

/* ── LAYOUT ────────────────────────────────────────────────────── */
main { position: relative; z-index: 1; }

.sect {
  max-width: 1060px;
  margin: 0 auto;
  padding: 100px 32px;
  min-height: 50vh;
}
.sect-hero { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; padding-top: 100px; }

.sect-num {
  font-size: .72rem; font-weight: 800; letter-spacing: .16em;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 6px;
}
.sect-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 900;
  letter-spacing: -.03em; color: var(--text); margin-bottom: 8px;
}
.sect-sub {
  font-size: .9rem; color: var(--muted); margin-bottom: 44px;
}

/* ── GLASS CARD (base) ─────────────────────────────────────────── */
.glass-card {
  background: var(--glass);
  backdrop-filter: blur(28px) saturate(1.3);
  -webkit-backdrop-filter: blur(28px) saturate(1.3);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
  position: relative; overflow: hidden;
  transition: var(--t);
}
.glass-card::before {
  content: '';
  position: absolute; top: 0; left: -30%; width: 160%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.16), transparent);
  pointer-events: none;
}
.glass-card:hover {
  border-color: var(--border-h);
  box-shadow: var(--shadow), 0 0 0 1px rgba(108,155,255,.06);
}

/* ── HERO ──────────────────────────────────────────────────────── */
.hero-content { max-width: 720px; }
.hero-hello {
  font-size: 1.1rem; color: var(--muted); margin-bottom: 10px; font-weight: 500;
}
.wave { display: inline-block; animation: wave .6s ease-in-out 2; transform-origin: 70% 70%; }
@keyframes wave {
  0%,60%,100% { transform: rotate(0); }
  10%,30% { transform: rotate(14deg); }
  20% { transform: rotate(-8deg); }
  40% { transform: rotate(-4deg); }
}

.hero-name {
  font-size: clamp(2.8rem, 7vw, 5rem); font-weight: 900;
  letter-spacing: -.04em; line-height: 1.05;
  background: linear-gradient(135deg, var(--text) 0%, var(--primary) 50%, var(--secondary) 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 10px;
}
.hero-typed {
  font-size: clamp(1.1rem, 2.5vw, 1.5rem); font-weight: 500;
  color: var(--muted); margin-bottom: 22px;
}
.typed { color: var(--primary); font-weight: 600; }
.typed-cursor {
  font-weight: 300; color: var(--primary);
  animation: blink .75s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-bio {
  font-size: .95rem; color: var(--muted); max-width: 580px;
  line-height: 1.8; margin-bottom: 34px;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }

.scroll-hint {
  margin-top: auto; padding-top: 40px;
  display: flex; align-items: center; gap: 12px;
  color: var(--muted); font-size: .78rem; letter-spacing: .05em;
}
.scroll-mouse {
  width: 22px; height: 34px; border-radius: 12px;
  border: 2px solid var(--border-h);
  display: flex; justify-content: center; padding-top: 6px;
}
.scroll-dot {
  width: 3px; height: 8px; border-radius: 3px;
  background: var(--primary);
  animation: scrollDot 1.8s var(--ease) infinite;
}
@keyframes scrollDot {
  0%   { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(12px); }
}

/* ── BUTTONS ───────────────────────────────────────────────────── */
.btn-glow {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 30px; border-radius: var(--r-pill);
  font-size: .88rem; font-weight: 700; letter-spacing: .03em;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--btn-on-primary); border: none; cursor: pointer;
  box-shadow: 0 4px 22px rgba(108,155,255,.3);
  transition: var(--t);
}
.btn-glow:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 36px rgba(108,155,255,.45);
}
.btn-outline {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 28px; border-radius: var(--r-pill);
  font-size: .88rem; font-weight: 600; letter-spacing: .03em;
  background: var(--glass); color: var(--text);
  border: 1px solid var(--border); cursor: pointer;
  transition: var(--t);
}
.btn-outline:hover {
  background: var(--glass-h); border-color: var(--border-h);
  transform: translateY(-2px);
}

/* ── ABOUT ─────────────────────────────────────────────────────── */
.about-body { margin-bottom: 36px; }
.about-body p {
  font-size: .92rem; color: var(--muted); line-height: 1.85;
  margin-bottom: 16px;
}
.about-cards {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px; margin-bottom: 28px;
}
.about-card {
  padding: 28px 22px; text-align: center;
  transition: transform var(--t), border-color var(--t);
}
.about-card:hover { transform: translateY(-4px); border-color: var(--border-h); }
.about-card-icon { font-size: 1.6rem; margin-bottom: 12px; }
.about-card h4 {
  font-size: .82rem; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--primary); margin-bottom: 8px;
}
.about-card p { font-size: .84rem; color: var(--muted); line-height: 1.6; }

.about-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.about-pills span {
  font-size: .76rem; font-weight: 600; padding: 6px 16px;
  border-radius: var(--r-pill);
  background: rgba(108,155,255,.1);
  color: var(--primary);
  border: 1px solid rgba(108,155,255,.2);
  transition: var(--t);
}
.about-pills span:hover {
  background: rgba(108,155,255,.18);
  transform: translateY(-1px);
}

/* ── EXPERIENCE ────────────────────────────────────────────────── */
.exp-list { display: flex; flex-direction: column; gap: 20px; }
.exp-card { padding: 32px 28px; }
.exp-card:hover { transform: translateY(-3px); }
.exp-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 16px; flex-wrap: wrap; }
.exp-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: 2px; }
.exp-org { font-size: .84rem; color: var(--muted); }
.exp-date { font-size: .76rem; color: var(--muted); margin-top: 4px; font-weight: 500; letter-spacing: .03em; }
.exp-badge {
  font-size: .68rem; font-weight: 700; letter-spacing: .05em;
  padding: 5px 14px; border-radius: var(--r-pill);
  flex-shrink: 0;
}
.badge-current { background: rgba(88,230,217,.14); color: var(--secondary); border: 1px solid rgba(88,230,217,.25); }
.badge-edu     { background: rgba(167,139,250,.14); color: var(--accent); border: 1px solid rgba(167,139,250,.25); }
.badge-research { background: rgba(108,155,255,.14); color: var(--primary); border: 1px solid rgba(108,155,255,.25); }

.exp-desc { font-size: .88rem; color: var(--muted); line-height: 1.8; margin-bottom: 16px; }
.exp-highlights { margin-bottom: 16px; }
.exp-highlights h4 {
  font-size: .74rem; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--primary); margin-bottom: 10px;
}
.exp-highlights ul { padding-left: 18px; list-style: disc; }
.exp-highlights li { font-size: .84rem; color: var(--muted); line-height: 1.7; margin-bottom: 4px; }

/* pills (reused everywhere) */
.pill-row { display: flex; flex-wrap: wrap; gap: 6px; }
.pill-row span {
  font-size: .72rem; font-weight: 600; padding: 4px 12px;
  border-radius: var(--r-pill);
  background: rgba(255,255,255,.05);
  border: 1px solid var(--border);
  color: var(--muted);
  transition: var(--t);
}
.pill-row span:hover { background: rgba(108,155,255,.1); color: var(--primary); border-color: rgba(108,155,255,.25); }

/* ── LEADERSHIP ────────────────────────────────────────────────── */
.lead-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.lead-card { padding: 30px 26px; }
.lead-card:hover { transform: translateY(-3px); }
.lead-card h3 { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.lead-org { font-size: .82rem; color: var(--primary); margin-bottom: 2px; }
.lead-date { font-size: .74rem; color: var(--muted); margin-bottom: 12px; }
.lead-desc { font-size: .86rem; color: var(--muted); line-height: 1.75; margin-bottom: 18px; }
.lead-stats { display: flex; gap: 12px; }
.lead-stat {
  display: flex; flex-direction: column; align-items: center;
  padding: 12px 18px; border-radius: var(--r-sm);
  background: rgba(255,255,255,.04); border: 1px solid var(--border);
  flex: 1; text-align: center;
}
.lead-stat strong {
  font-size: 1.1rem; font-weight: 800; color: var(--text);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.lead-stat span { font-size: .7rem; color: var(--muted); margin-top: 2px; }

/* ── PROJECTS ──────────────────────────────────────────────────── */
.proj-filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 28px; }
.proj-filter {
  padding: 7px 20px; border-radius: var(--r-pill);
  font-size: .8rem; font-weight: 600; font-family: inherit; cursor: pointer;
  background: var(--glass2); color: var(--muted);
  border: 1px solid var(--border); transition: var(--t);
}
.proj-filter:hover { background: var(--glass); color: var(--text); }
.proj-filter.active {
  background: rgba(108,155,255,.12); color: var(--primary);
  border-color: rgba(108,155,255,.3);
}

.proj-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
}
.proj-card {
  display: flex; flex-direction: column;
  transition: transform var(--t), border-color var(--t), box-shadow var(--t);
}
.proj-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-h);
  box-shadow: var(--shadow), 0 0 40px rgba(108,155,255,.08);
}
.proj-card.hidden { display: none; }

.proj-visual {
  height: 120px; display: flex; align-items: center; justify-content: center;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at 25% 30%, rgba(108,155,255,.2), transparent 50%),
    radial-gradient(circle at 75% 70%, rgba(88,230,217,.15), transparent 50%),
    linear-gradient(135deg, rgba(255,255,255,.04), rgba(255,255,255,.01));
}
.proj-icon { font-size: 2rem; }

.proj-body { padding: 22px; flex: 1; display: flex; flex-direction: column; gap: 10px; }
.proj-tag {
  font-size: .68rem; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--primary);
}
.proj-body h3 { font-size: 1rem; font-weight: 700; color: var(--text); }
.proj-body p { font-size: .84rem; color: var(--muted); line-height: 1.7; flex: 1; }

.proj-stats { display: flex; gap: 10px; margin-top: 4px; }
.proj-stat {
  display: flex; flex-direction: column; align-items: center;
  padding: 10px 14px; border-radius: var(--r-sm);
  background: rgba(255,255,255,.04); border: 1px solid var(--border);
  flex: 1; text-align: center;
}
.proj-stat strong {
  font-size: .88rem; font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.proj-stat span { font-size: .68rem; color: var(--muted); }
.proj-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}
.proj-actions a {
  font-size: .74rem;
  font-weight: 600;
  color: var(--primary);
  padding: 5px 12px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(108,155,255,.25);
  background: rgba(108,155,255,.08);
  transition: var(--t);
}
.proj-actions a:hover {
  color: #060a14;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
}

/* ── SKILLS ────────────────────────────────────────────────────── */
.skills-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
}
.skill-block { padding: 28px 24px; }
.skill-block:hover { transform: translateY(-3px); }
.skill-block h3 {
  font-size: .82rem; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; color: var(--primary); margin-bottom: 20px;
}
.skill-bar-group { display: flex; flex-direction: column; gap: 16px; }
.skill-bar-top {
  display: flex; justify-content: space-between;
  font-size: .82rem; color: var(--muted); margin-bottom: 6px;
}
.skill-bar-top span:last-child { font-weight: 700; color: var(--text); }
.skill-bar-track {
  height: 6px; border-radius: var(--r-pill);
  background: rgba(255,255,255,.06); overflow: hidden;
}
.skill-bar-fill {
  height: 100%; width: 0%; border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  box-shadow: 0 0 14px rgba(108,155,255,.45);
  transition: width 1.4s var(--ease);
}
.skill-bar-fill.filled { width: var(--w); }

/* ── CONTACT ───────────────────────────────────────────────────── */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 24px; align-items: start;
}
.contact-links { display: flex; flex-direction: column; gap: 14px; }
.contact-link-card {
  padding: 22px 20px; display: block;
  transition: transform var(--t), border-color var(--t);
}
.contact-link-card:hover { transform: translateY(-3px); border-color: var(--border-h); }
.contact-link-card h4 { font-size: .9rem; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.contact-link-card p { font-size: .82rem; color: var(--muted); }
.cl-action {
  display: inline-block; margin-top: 8px;
  font-size: .78rem; font-weight: 600; color: var(--primary);
  transition: color var(--t);
}
.contact-link-card:hover .cl-action { color: var(--secondary); }

.contact-form { padding: 32px 28px; display: flex; flex-direction: column; gap: 14px; }
.contact-form input,
.contact-form textarea {
  width: 100%; padding: 12px 16px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text); font-family: inherit; font-size: .88rem;
  transition: var(--t); outline: none; resize: vertical;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--muted); }
.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108,155,255,.12);
  background: rgba(255,255,255,.06);
}
.form-note {
  font-size: .74rem;
  color: var(--muted);
  margin-top: 2px;
}

/* ── FOOTER ────────────────────────────────────────────────────── */
footer {
  text-align: center; padding: 36px 24px;
  color: rgba(125,143,179,.5); font-size: .78rem;
  border-top: 1px solid var(--border);
  position: relative; z-index: 1;
}

/* ── BACK TO TOP ───────────────────────────────────────────────── */
.back-to-top {
  position: fixed; bottom: 28px; right: 28px; z-index: 90;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--glass);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  color: var(--muted); font-size: 1.1rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transform: translateY(14px);
  transition: opacity var(--t), transform var(--t), color var(--t), border-color var(--t);
  pointer-events: none;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { color: var(--primary); border-color: rgba(108,155,255,.3); }

/* ── REVEAL ANIMATION ──────────────────────────────────────────── */
.reveal {
  opacity: 0; transform: translateY(36px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.revealed { opacity: 1; transform: translateY(0); }

/* ── RESPONSIVE ────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .navbar { padding: 0 24px; }
  .nav-cv-btn { display: none; }
  .sect { padding: 72px 20px; }
  .about-cards { grid-template-columns: 1fr; }
  .lead-grid { grid-template-columns: 1fr; }
  .proj-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .hero-name { font-size: 2.4rem; }
  .sect { padding: 56px 16px; }
  .hero-btns { flex-direction: column; }
  .hero-btns a { width: 100%; text-align: center; }
  .exp-card { padding: 24px 20px; }
  .about-pills { gap: 6px; }
}

/* ── REDUCED MOTION ────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
  .cursor-glow { display: none; }
  .reveal { opacity: 1; transform: none; }
  .skill-bar-fill { transition: none; }
  .skill-bar-fill.filled { width: var(--w); }
}