/* ============================================================
   DR. A. C. SUBHAJINI – PORTFOLIO  |  main.css
   Clean modern design · Indigo accent · Smooth animations
   ============================================================ */

/* ----------------------------------------------------------
   1. TOKENS
   ---------------------------------------------------------- */
:root {
  /* Accent */
  --clr-accent:        #4f46e5;
  --clr-accent-light:  #6d64f7;
  --clr-accent-dark:   #3730a3;
  --clr-highlight:     #f59e0b;

  /* Light mode surfaces */
  --clr-bg:            #f8faff;
  --clr-bg-alt:        #f0f2fb;
  --clr-surface:       #ffffff;
  --clr-surface-2:     #eef0fa;
  --clr-border:        #dde1f0;

  /* Text */
  --clr-heading:       #0d0f1c;
  --clr-text:          #1e2235;
  --clr-muted:         #5a6280;
  --clr-light:         #9299b0;

  /* Fonts */
  --font-heading: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Plus Jakarta Sans', system-ui, sans-serif;

  /* Scale */
  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-md:   1.125rem;
  --fs-lg:   1.375rem;
  --fs-xl:   1.875rem;
  --fs-2xl:  2.5rem;
  --fs-3xl:  3.25rem;
  --fs-4xl:  4.5rem;

  --fw-light:   300;
  --fw-regular: 400;
  --fw-medium:  500;
  --fw-semi:    600;
  --fw-bold:    700;

  --lh-tight:  1.15;
  --lh-snug:   1.35;
  --lh-normal: 1.65;
  --lh-loose:  1.85;

  /* Spacing */
  --sp-1: .25rem;  --sp-2: .5rem;  --sp-3: .75rem;
  --sp-4: 1rem;    --sp-5: 1.25rem; --sp-6: 1.5rem;
  --sp-8: 2rem;    --sp-10: 2.5rem; --sp-12: 3rem;
  --sp-16: 4rem;   --sp-20: 5rem;   --sp-24: 6rem;

  /* Layout */
  --container-max: 1200px;
  --container-pad: clamp(1rem, 5vw, 2.5rem);
  --nav-h: 72px;

  /* Radii */
  --r-sm:   6px;
  --r-md:   12px;
  --r-lg:   20px;
  --r-full: 9999px;

  /* Shadows */
  --sh-sm:  0 1px 4px rgba(79,70,229,.06), 0 1px 2px rgba(0,0,0,.04);
  --sh-md:  0 4px 18px rgba(79,70,229,.08), 0 2px 8px rgba(0,0,0,.05);
  --sh-lg:  0 12px 40px rgba(79,70,229,.10), 0 4px 14px rgba(0,0,0,.07);
  --sh-xl:  0 24px 64px rgba(79,70,229,.14);
  --sh-acc: 0 8px 28px rgba(79,70,229,.30);

  /* Motion */
  --ease-out:    cubic-bezier(.22,1,.36,1);
  --ease-spring: cubic-bezier(.34,1.56,.64,1);
  --dur-fast: 150ms;
  --dur-base: 300ms;
  --dur-slow: 600ms;
}

/* Dark mode */
[data-theme="dark"] {
  --clr-bg:        #080c16;
  --clr-bg-alt:    #0e1221;
  --clr-surface:   #141828;
  --clr-surface-2: #1b2035;
  --clr-border:    #252d48;
  --clr-heading:   #eef0ff;
  --clr-text:      #c8ccde;
  --clr-muted:     #7880a0;
  --clr-light:     #4b5270;
  --sh-sm:  0 1px 4px rgba(0,0,0,.4);
  --sh-md:  0 4px 18px rgba(0,0,0,.5);
  --sh-lg:  0 12px 40px rgba(0,0,0,.6);
  --sh-xl:  0 24px 64px rgba(0,0,0,.7);
  --sh-acc: 0 8px 28px rgba(79,70,229,.45);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  line-height: var(--lh-normal);
  color: var(--clr-text);
  background: var(--clr-bg);
  overflow-x: hidden;
  transition: background var(--dur-base) var(--ease-out),
              color       var(--dur-base) var(--ease-out);
  -webkit-font-smoothing: antialiased;
}

img,svg { display:block; max-width:100%; height:auto; }
a { color:var(--clr-accent); text-decoration:none; transition:color var(--dur-fast); }
a:hover { color:var(--clr-accent-light); text-decoration:underline; }
ul { list-style:none; }
button { cursor:pointer; font-family:inherit; border:none; background:none; }
:focus-visible { outline:2px solid var(--clr-accent); outline-offset:3px; border-radius:var(--r-sm); }
::selection { background:var(--clr-accent); color:#fff; }

/* ----------------------------------------------------------
   3. LAYOUT
   ---------------------------------------------------------- */
.container {
  width:100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section        { padding-block: var(--sp-20); }
.alt-section    { background: var(--clr-bg-alt); }

/* Section header */
.section-header { text-align:center; margin-bottom: var(--sp-12); }

.section-eyebrow {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semi);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: var(--sp-2);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(var(--fs-xl), 4vw, var(--fs-2xl));
  font-weight: var(--fw-bold);
  color: var(--clr-heading);
  line-height: var(--lh-tight);
  margin-bottom: var(--sp-4);
}

.section-line {
  width: 52px; height: 3px;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-highlight));
  border-radius: var(--r-full);
  margin-inline: auto;
}

/* ----------------------------------------------------------
   4. BUTTONS
   ---------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semi);
  border-radius: var(--r-full);
  border: 2px solid transparent;
  white-space: nowrap;
  text-decoration: none;
  transition:
    background var(--dur-fast) var(--ease-out),
    color      var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast),
    transform  var(--dur-fast) var(--ease-spring),
    box-shadow var(--dur-fast);
}
.btn:hover { transform:translateY(-2px); text-decoration:none; }
.btn:active { transform:translateY(0); }

.btn--primary {
  background: var(--clr-accent);
  color: #fff;
  box-shadow: var(--sh-acc);
}
.btn--primary:hover { background: var(--clr-accent-dark); color:#fff; box-shadow: 0 12px 36px rgba(79,70,229,.45); }

.btn--outline {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}
.btn--outline:hover { background: var(--clr-accent); color:#fff; }

.btn--ghost {
  border-color: rgba(255,255,255,.45);
  color: rgba(255,255,255,.9);
  background: rgba(255,255,255,.08);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover { background: rgba(255,255,255,.2); color:#fff; }

.btn--full { width:100%; }
.btn--sm   { padding: var(--sp-2) var(--sp-4); font-size: var(--fs-xs); }

/* ----------------------------------------------------------
   5. NAVIGATION
   ---------------------------------------------------------- */
.nav-header {
  position: fixed; top:0; left:0; right:0; z-index:1000;
  height: var(--nav-h);
  background: transparent;
  transition: background var(--dur-base), box-shadow var(--dur-base);
}
.nav-header.scrolled {
  background: rgba(248,250,255,.88);
  backdrop-filter: blur(20px) saturate(200%);
  -webkit-backdrop-filter: blur(20px) saturate(200%);
  box-shadow: 0 1px 0 var(--clr-border), 0 8px 24px rgba(79,70,229,.06);
}
[data-theme="dark"] .nav-header.scrolled {
  background: rgba(8,12,22,.88);
  box-shadow: 0 1px 0 var(--clr-border), 0 8px 28px rgba(0,0,0,.45);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  gap: var(--sp-4);
  overflow: hidden;
}

/* Logo */
.nav-logo {
  display:flex; align-items:center; gap:var(--sp-2);
  text-decoration:none; flex-shrink:0;
  transition: opacity var(--dur-fast);
}
.nav-logo:hover { opacity:.8; text-decoration:none; }

.logo-initials {
  width:38px; height:38px; border-radius:10px;
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-light));
  color:#fff;
  font-size:.75rem; font-weight:var(--fw-bold); letter-spacing:.04em;
  display:grid; place-items:center; flex-shrink:0;
  box-shadow: var(--sh-acc);
  position:relative; overflow:hidden;
}
.logo-initials::after {
  content:'';
  position:absolute; inset:0;
  background: linear-gradient(120deg,transparent 30%,rgba(255,255,255,.3) 50%,transparent 70%);
  transform: translateX(-100%);
  transition: transform .5s ease;
}
.nav-logo:hover .logo-initials::after { transform: translateX(100%); }

.logo-name { display:flex; flex-direction:column; line-height:1.2; min-width:0; }
.logo-name-primary {
  font-family: var(--font-heading);
  font-size:.95rem; font-weight:var(--fw-semi); font-style:italic;
  color: rgba(255,255,255,.92);
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
  transition: color var(--dur-base);
}
.logo-name-sub {
  font-size:.58rem; font-weight:var(--fw-medium);
  letter-spacing:.1em; text-transform:uppercase;
  color: rgba(255,255,255,.5);
  transition: color var(--dur-base);
}
.nav-header.scrolled .logo-name-primary { color: var(--clr-heading); }
.nav-header.scrolled .logo-name-sub     { color: var(--clr-accent); }

/* Links */
.nav-links {
  display:flex; align-items:center; gap:2px;
  flex:1; justify-content:center; flex-wrap:nowrap; min-width:0;
}

.nav-link {
  position:relative;
  padding: 6px 11px;
  font-size:.8rem; font-weight:var(--fw-medium);
  color: rgba(255,255,255,.78);
  border-radius: var(--r-full);
  text-decoration:none; white-space:nowrap; flex-shrink:0;
  transition: color var(--dur-fast), background var(--dur-fast);
}
.nav-header.scrolled .nav-link { color: var(--clr-muted); }

.nav-link::after {
  content:'';
  position:absolute; bottom:3px; left:50%;
  transform: translateX(-50%) scale(0);
  width:4px; height:4px; border-radius:50%;
  background: var(--clr-accent);
  transition: transform var(--dur-base) var(--ease-spring);
}
.nav-link:hover,
.nav-link.active { color:var(--clr-accent); background:rgba(79,70,229,.08); text-decoration:none; }
.nav-header:not(.scrolled) .nav-link:hover,
.nav-header:not(.scrolled) .nav-link.active { color:#fff; background:rgba(255,255,255,.12); }
.nav-link:hover::after,
.nav-link.active::after { transform:translateX(-50%) scale(1); }

.nav-link--cta {
  background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-light));
  color:#fff !important;
  padding: 7px 18px; border-radius:var(--r-full); margin-left:var(--sp-2);
  font-weight:var(--fw-semi); font-size:.8rem;
  box-shadow: 0 3px 14px rgba(79,70,229,.35);
  flex-shrink:0;
  transition: box-shadow var(--dur-fast), transform var(--dur-fast) var(--ease-spring), filter var(--dur-fast);
}
.nav-link--cta::after { display:none; }
.nav-link--cta:hover { transform:translateY(-2px); box-shadow:0 6px 22px rgba(79,70,229,.5); filter:brightness(1.1); }

/* Actions */
.nav-actions { display:flex; align-items:center; gap:var(--sp-2); flex-shrink:0; }

/* Theme toggle */
.theme-toggle {
  position:relative; width:50px; height:26px;
  border-radius:var(--r-full);
  background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.2);
  display:flex; align-items:center; justify-content:space-between;
  padding:2px 5px; cursor:pointer; overflow:hidden;
  transition: background var(--dur-base), border-color var(--dur-base);
}
.nav-header.scrolled .theme-toggle { background:var(--clr-surface-2); border-color:var(--clr-border); }
.theme-toggle::before {
  content:''; position:absolute;
  top:2px; left:2px;
  width:20px; height:20px; border-radius:50%;
  background: linear-gradient(135deg,var(--clr-accent),var(--clr-accent-light));
  box-shadow:0 2px 6px rgba(79,70,229,.4);
  transition: transform var(--dur-base) var(--ease-spring);
}
[data-theme="dark"] .theme-toggle::before { transform:translateX(24px); }
.theme-toggle:hover { box-shadow:0 0 0 3px rgba(79,70,229,.2); }

.theme-icon { font-size:.65rem; z-index:1; pointer-events:none; transition:opacity var(--dur-base); }
.theme-icon--light { order:1; }
.theme-icon--dark  { order:2; display:block; }
[data-theme="light"] .theme-icon--light { opacity:0; }
[data-theme="light"] .theme-icon--dark  { opacity:1; }
[data-theme="dark"]  .theme-icon--light { opacity:1; }
[data-theme="dark"]  .theme-icon--dark  { opacity:0; }

/* Mobile menu backdrop overlay */
.nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
}
.nav-backdrop.visible { opacity: 1; }

/* Hamburger */
.nav-hamburger {
  display:none; flex-direction:column; justify-content:center; align-items:center;
  gap:5px; width:38px; height:38px; padding:var(--sp-2);
  border-radius:var(--r-sm);
  background:rgba(255,255,255,.1); border:1px solid rgba(255,255,255,.18);
  transition: background var(--dur-fast), border-color var(--dur-fast);
}
.nav-header.scrolled .nav-hamburger { background:var(--clr-surface-2); border-color:var(--clr-border); }
.nav-hamburger:hover { background:rgba(79,70,229,.15); border-color:var(--clr-accent); }
.nav-hamburger span {
  display:block; border-radius:var(--r-full); background:rgba(255,255,255,.85);
  transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-base), width var(--dur-base);
  transform-origin:center;
}
.nav-hamburger span:nth-child(1) { width:20px; height:2px; }
.nav-hamburger span:nth-child(2) { width:14px; height:2px; }
.nav-hamburger span:nth-child(3) { width:20px; height:2px; }
.nav-header.scrolled .nav-hamburger span { background: var(--clr-text); }
.nav-hamburger.open span:nth-child(1) { transform:translateY(7px) rotate(45deg); width:20px; }
.nav-hamburger.open span:nth-child(2) { opacity:0; transform:scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform:translateY(-7px) rotate(-45deg); width:20px; }

/* ----------------------------------------------------------
   6. HERO
   ---------------------------------------------------------- */
.hero-section {
  position:relative; min-height:100vh;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  background: linear-gradient(135deg,#06091a 0%,#0e0d35 45%,#190a42 100%);
  overflow:hidden; padding-top:var(--nav-h);
}

/* Subtle grid */
.hero-section::before {
  content:''; position:absolute; inset:0; z-index:0;
  background-image:
    linear-gradient(rgba(79,70,229,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(79,70,229,.05) 1px,transparent 1px);
  background-size:48px 48px;
  pointer-events:none;
}

#hero-canvas {
  position:absolute; inset:0; width:100%; height:100%; z-index:0; opacity:.6;
}

.hero-overlay {
  position:relative; z-index:1;
  width:100%; display:flex; flex-direction:column;
  align-items:center; min-height:calc(100vh - var(--nav-h));
}

.hero-content {
  flex:1; display:flex; flex-direction:column;
  align-items:center; justify-content:center;
  text-align:center; padding: var(--sp-8) var(--container-pad);
  max-width:860px; width:100%; margin-inline:auto;
}

.hero-eyebrow {
  font-size:var(--fs-xs); font-weight:var(--fw-semi);
  letter-spacing:.18em; text-transform:uppercase;
  color:#a78bfa; margin-bottom:var(--sp-4);
}

.hero-title {
  font-family:var(--font-heading);
  font-size: clamp(2.6rem,8vw,5.5rem);
  font-weight:var(--fw-bold); font-style:italic;
  letter-spacing:-.01em; color:#fff;
  line-height:var(--lh-tight);
  margin-bottom:var(--sp-4);
  text-shadow:0 4px 32px rgba(79,70,229,.3);
}

.hero-tagline {
  font-size: clamp(var(--fs-sm),2.2vw,var(--fs-md));
  font-weight:var(--fw-medium);
  letter-spacing:.14em; text-transform:uppercase;
  color:#a78bfa; margin-bottom:var(--sp-5);
}

.hero-subtitle {
  font-size: clamp(var(--fs-sm),2vw,var(--fs-md));
  color:rgba(255,255,255,.65); max-width:560px;
  margin-bottom:var(--sp-8); line-height:var(--lh-loose);
}

.hero-cta {
  display:flex; flex-wrap:nowrap; gap:var(--sp-3);
  justify-content:center; align-items:center;
}
.hero-cta .btn { flex-shrink:0; }

/* Animate-on-load fade-up for hero */
.animate-fade-up {
  opacity:0;
  transform:translateY(24px);
  animation: heroFadeUp .7s var(--ease-out) forwards;
  animation-delay: var(--delay, 0s);
}
@keyframes heroFadeUp {
  to { opacity:1; transform:translateY(0); }
}

/* Scroll hint */
.hero-scroll-hint {
  display:flex; flex-direction:column; align-items:center; gap:var(--sp-2);
  color:rgba(255,255,255,.35); font-size:var(--fs-xs); letter-spacing:.1em;
  padding-bottom:var(--sp-6);
  animation: scrollBounce 2.5s ease-in-out infinite;
}
.scroll-line { width:1px; height:38px; background:linear-gradient(to bottom,rgba(255,255,255,.35),transparent); border-radius:var(--r-full); }
@keyframes scrollBounce {
  0%,100% { opacity:.35; transform:translateY(0); }
  50%      { opacity:.8;  transform:translateY(6px); }
}

/* ----------------------------------------------------------
   7. ABOUT
   ---------------------------------------------------------- */
.about-grid {
  display:grid; grid-template-columns:260px 1fr;
  gap:var(--sp-12); align-items:start;
}

.about-photo-col {
  display:flex; flex-direction:column; align-items:center; gap:var(--sp-4);
  position:sticky; top:calc(var(--nav-h) + var(--sp-6));
}

.about-photo-frame {
  width:220px; height:220px; border-radius:var(--r-lg);
  overflow:hidden; position:relative;
  background:linear-gradient(135deg,var(--clr-accent),var(--clr-accent-dark));
  box-shadow:var(--sh-xl); border:2px solid var(--clr-border);
}
.about-photo { width:100%; height:100%; object-fit:cover; object-position:top center; }
.photo-fallback-text {
  display:none; position:absolute; inset:0;
  align-items:center; justify-content:center;
  font-family:var(--font-heading); font-size:3.5rem; font-weight:var(--fw-bold);
  color:rgba(255,255,255,.75);
}
.about-photo-frame.photo-fallback .photo-fallback-text { display:flex; }
.about-photo-frame.photo-fallback .about-photo { opacity:0; }

.about-social { display:flex; gap:var(--sp-3); }
.social-btn {
  width:38px; height:38px; border-radius:var(--r-md);
  background:var(--clr-surface); border:1px solid var(--clr-border);
  display:grid; place-items:center; box-shadow:var(--sh-sm);
  transition: background var(--dur-fast), transform var(--dur-fast) var(--ease-spring), box-shadow var(--dur-fast);
}
.social-btn svg { width:17px; height:17px; color:var(--clr-muted); }
.social-btn:hover { background:var(--clr-accent); border-color:var(--clr-accent); transform:translateY(-3px); box-shadow:var(--sh-acc); text-decoration:none; }
.social-btn:hover svg { color:#fff; }

.about-bio { font-size:var(--fs-md); color:var(--clr-muted); line-height:var(--lh-loose); margin-bottom:var(--sp-5); }

.stats-grid {
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:var(--sp-3); margin-bottom:var(--sp-8);
}
.stat-card {
  background:var(--clr-surface); border:1px solid var(--clr-border);
  border-radius:var(--r-md); padding:var(--sp-4); text-align:center;
  box-shadow:var(--sh-sm);
  transition: transform var(--dur-fast) var(--ease-spring), box-shadow var(--dur-fast);
}
.stat-card:hover { transform:translateY(-5px); box-shadow:var(--sh-md); }
.stat-num {
  display:inline; font-family:var(--font-heading);
  font-size:var(--fs-2xl); font-weight:var(--fw-bold); color:var(--clr-accent);
}
.stat-suffix { font-family:var(--font-heading); font-size:var(--fs-xl); font-weight:var(--fw-bold); color:var(--clr-accent); }
.stat-label { display:block; font-size:var(--fs-xs); font-weight:var(--fw-medium); color:var(--clr-muted); margin-top:var(--sp-1); }

.interest-title { font-size:var(--fs-sm); font-weight:var(--fw-semi); color:var(--clr-heading); margin-bottom:var(--sp-3); letter-spacing:.04em; }
.tags-row { display:flex; flex-wrap:wrap; gap:var(--sp-2); }

.tag {
  display:inline-block; padding:4px var(--sp-3);
  font-size:var(--fs-xs); font-weight:var(--fw-medium);
  color:var(--clr-accent); background:rgba(79,70,229,.1); border:1px solid rgba(79,70,229,.2);
  border-radius:var(--r-full);
  transition: background var(--dur-fast), color var(--dur-fast), transform var(--dur-fast);
}
.tag:hover { background:var(--clr-accent); color:#fff; transform:translateY(-2px); }
.tag--sm { font-size:.68rem; padding:2px var(--sp-2); }

/* ----------------------------------------------------------
   8. TIMELINE
   ---------------------------------------------------------- */
.timeline {
  position:relative; max-width:800px; margin-inline:auto;
  padding-left:var(--sp-8);
}
.timeline::before {
  content:''; position:absolute; left:0; top:10px; bottom:10px;
  width:2px;
  background:linear-gradient(to bottom,var(--clr-accent),var(--clr-highlight),transparent);
  border-radius:var(--r-full);
}
.tl-item { position:relative; margin-bottom:var(--sp-10); }
.tl-item:last-child { margin-bottom:0; }

.tl-dot {
  position:absolute; left:calc(-1 * var(--sp-8) - 5px); top:16px;
  width:12px; height:12px; border-radius:50%;
  background:var(--clr-accent); border:3px solid var(--clr-bg-alt);
  box-shadow:0 0 0 2px var(--clr-accent);
  transition: transform var(--dur-base) var(--ease-spring), box-shadow var(--dur-base);
}
.tl-item:hover .tl-dot { transform:scale(1.6); box-shadow:0 0 0 4px rgba(79,70,229,.25); }
.tl-dot--accent { background:var(--clr-accent); }

.tl-body {
  background:var(--clr-surface); border:1px solid var(--clr-border);
  border-radius:var(--r-md); padding:var(--sp-6); box-shadow:var(--sh-sm);
  transition: box-shadow var(--dur-base), transform var(--dur-base) var(--ease-out);
}
.tl-item:hover .tl-body { box-shadow:var(--sh-md); transform:translateX(5px); }

.tl-meta { display:flex; align-items:center; gap:var(--sp-3); margin-bottom:var(--sp-2); flex-wrap:wrap; }
.tl-year { font-size:var(--fs-xs); font-weight:var(--fw-semi); color:var(--clr-accent); letter-spacing:.05em; }
.tl-badge {
  font-size:var(--fs-xs); font-weight:var(--fw-semi); padding:2px var(--sp-3);
  background:rgba(79,70,229,.1); color:var(--clr-accent);
  border-radius:var(--r-full); border:1px solid rgba(79,70,229,.2);
}
.tl-badge--green { background:rgba(34,197,94,.12); color:#16a34a; border-color:rgba(34,197,94,.25); }
[data-theme="dark"] .tl-badge--green { color:#4ade80; }

.tl-title { font-family:var(--font-heading); font-size:var(--fs-lg); font-weight:var(--fw-semi); color:var(--clr-heading); margin-bottom:var(--sp-1); }
.tl-org   { font-size:var(--fs-sm); font-weight:var(--fw-medium); color:var(--clr-muted); margin-bottom:var(--sp-3); }
.tl-desc  { font-size:var(--fs-sm); color:var(--clr-muted); line-height:var(--lh-loose); }
.tl-list  { list-style:disc; padding-left:var(--sp-4); color:var(--clr-muted); font-size:var(--fs-sm); line-height:var(--lh-loose); }
.tl-list li { margin-bottom:var(--sp-1); }

/* ----------------------------------------------------------
      9. RESEARCH – BENTO GRID CARDS
   ---------------------------------------------------------- */

/* ── Section wrapper ── */
.research-section {
  background: linear-gradient(160deg, var(--clr-bg) 0%, var(--clr-bg-alt) 100%);
  padding-bottom: var(--sp-20);
}

/* ── Bento grid ── */
.research-bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: var(--sp-5);
}

/* Wide cards span 2 columns */
.rb-card--wide { grid-column: span 2; }

/* ── Single card ── */
.rb-card {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  cursor: default;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  box-shadow: var(--sh-md);
  transition:
    transform .35s cubic-bezier(.34,1.2,.64,1),
    box-shadow .35s ease,
    border-color .35s ease;
}
.rb-card:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: var(--sh-xl);
  border-color: transparent;
}

/* Gradient border on hover via pseudo-element */
.rb-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  padding: 1.5px;
  background: var(--rb-grad, linear-gradient(135deg,#4f46e5,#f59e0b));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity .35s ease;
  pointer-events: none;
}
.rb-card:hover::before { opacity: 1; }

/* Per-card gradient accents */
.rb-card--1 { --rb-grad: linear-gradient(135deg,#4f46e5 0%,#a855f7 100%); }
.rb-card--2 { --rb-grad: linear-gradient(135deg,#0ea5e9 0%,#4f46e5 100%); }
.rb-card--3 { --rb-grad: linear-gradient(135deg,#10b981 0%,#0ea5e9 100%); }
.rb-card--4 { --rb-grad: linear-gradient(135deg,#f59e0b 0%,#ef4444 100%); }

/* Glow blob behind card */
.rb-card-glow {
  position: absolute;
  width: 200px; height: 200px;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0;
  transition: opacity .5s ease;
  pointer-events: none;
  z-index: 0;
  top: -40px; right: -40px;
}
.rb-card--1 .rb-card-glow { background: rgba(79,70,229,.25); }
.rb-card--2 .rb-card-glow { background: rgba(14,165,233,.25); }
.rb-card--3 .rb-card-glow { background: rgba(16,185,129,.25); }
.rb-card--4 .rb-card-glow { background: rgba(245,158,11,.25); }
.rb-card:hover .rb-card-glow { opacity: 1; }

/* Card inner content */
.rb-card-inner {
  position: relative; z-index: 1;
  padding: var(--sp-8);
  display: flex; flex-direction: column; gap: var(--sp-4);
  height: 100%;
}

/* Header row */
.rb-card-header {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.rb-emoji {
  font-size: 2.2rem;
  line-height: 1;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,.2));
  transition: transform .3s cubic-bezier(.34,1.56,.64,1);
}
.rb-card:hover .rb-emoji { transform: scale(1.2) rotate(-5deg); }

.rb-domain-badge {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semi);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--clr-accent);
  background: rgba(79,70,229,.1);
  border: 1px solid rgba(79,70,229,.2);
  border-radius: var(--r-full);
  padding: 4px var(--sp-3);
}
.rb-card--2 .rb-domain-badge { color:#0ea5e9; background:rgba(14,165,233,.1); border-color:rgba(14,165,233,.2); }
.rb-card--3 .rb-domain-badge { color:#10b981; background:rgba(16,185,129,.1); border-color:rgba(16,185,129,.2); }
.rb-card--4 .rb-domain-badge { color:#f59e0b; background:rgba(245,158,11,.1); border-color:rgba(245,158,11,.2); }

/* Title */
.rb-title {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  font-weight: var(--fw-bold);
  color: var(--clr-heading);
  line-height: var(--lh-tight);
}

/* Description */
.rb-desc {
  font-size: var(--fs-sm);
  color: var(--clr-muted);
  line-height: var(--lh-loose);
  flex: 1;
}

/* Highlight pills */
.rb-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}
.rb-hl {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semi);
  color: var(--clr-heading);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-full);
  padding: 3px var(--sp-3);
  transition: background .2s, color .2s, border-color .2s;
}
.rb-card:hover .rb-hl {
  background: rgba(79,70,229,.1);
  color: var(--clr-accent);
  border-color: rgba(79,70,229,.25);
}
.rb-card--2:hover .rb-hl { background:rgba(14,165,233,.1); color:#0ea5e9; border-color:rgba(14,165,233,.3); }
.rb-card--3:hover .rb-hl { background:rgba(16,185,129,.1); color:#10b981; border-color:rgba(16,185,129,.3); }
.rb-card--4:hover .rb-hl { background:rgba(245,158,11,.1); color:#d97706; border-color:rgba(245,158,11,.3); }

/* Stack tags row */
.rb-stack { display:flex; flex-wrap:wrap; gap:var(--sp-2); }

/* Responsive bento */
@media (max-width: 900px) {
  .research-bento { grid-template-columns: repeat(2, 1fr); }
  .rb-card--wide  { grid-column: span 2; }
}
@media (max-width: 600px) {
  .research-bento { grid-template-columns: 1fr; }
  .rb-card--wide  { grid-column: span 1; }
  .rb-card-inner  { padding: var(--sp-6); }
}

/* ──────────────────────────────────────────────────────────

/* ----------------------------------------------------------
   10. ACHIEVEMENTS
   ---------------------------------------------------------- */

/* Marquee ticker */
.marquee-wrap {
  width: 100%;
  overflow: hidden;
  background: linear-gradient(90deg, var(--clr-accent-dark), var(--clr-accent), var(--clr-accent-dark));
  padding: var(--sp-3) 0;
  margin-bottom: var(--sp-12);
  position: relative;
}
.marquee-wrap::before,
.marquee-wrap::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 80px;
  z-index: 2;
}
.marquee-wrap::before { left: 0;  background: linear-gradient(to right, var(--clr-accent-dark), transparent); }
.marquee-wrap::after  { right: 0; background: linear-gradient(to left,  var(--clr-accent-dark), transparent); }
.marquee-track {
  display: flex;
  gap: var(--sp-6);
  width: max-content;
  white-space: nowrap;
  animation: marquee 28s linear infinite;
}
.marquee-track:hover { animation-play-state: paused; }
.marquee-track span {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semi);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(255,255,255,.9);
}
.msep { color: rgba(255,255,255,.3) !important; }
@keyframes marquee {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Stats row */
.ach-stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-4);
  justify-content: center;
  margin-bottom: var(--sp-12);
}
.ach-stat {
  position: relative;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  padding: var(--sp-8) var(--sp-6);
  text-align: center;
  flex: 1 1 150px;
  max-width: 200px;
  overflow: hidden;
  box-shadow: var(--sh-md);
  transition: transform var(--dur-base) var(--ease-spring), box-shadow var(--dur-base);
}
.ach-stat::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-highlight));
  border-radius: var(--r-full) var(--r-full) 0 0;
}
.ach-stat:hover { transform: translateY(-8px); box-shadow: var(--sh-xl); }

.ach-icon { font-size: 2rem; display: block; margin-bottom: var(--sp-3); }
.ach-num  {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: var(--fw-bold);
  color: var(--clr-accent);
  line-height: 1;
  display: inline;
}
.ach-plus {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: var(--fw-bold);
  color: var(--clr-highlight);
  display: inline;
}
.ach-lbl {
  display: block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semi);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--clr-muted);
  margin-top: var(--sp-2);
}

/* Achievement cards grid */
.ach-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}
.ach-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--sh-sm);
  transition: transform var(--dur-base) var(--ease-spring), box-shadow var(--dur-base), border-color var(--dur-base);
}
.ach-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--sh-lg);
  border-color: rgba(79,70,229,.3);
}
.ach-card-top {
  height: 4px;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-highlight));
}
.ach-card-body  { padding: var(--sp-6); }
.ach-card-icon  { font-size: 1.8rem; display: block; margin-bottom: var(--sp-3); }
.ach-card-title {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semi);
  color: var(--clr-heading);
  margin-bottom: var(--sp-2);
  line-height: var(--lh-snug);
}
.ach-card-desc {
  font-size: var(--fs-sm);
  color: var(--clr-muted);
  line-height: var(--lh-loose);
}

/* ----------------------------------------------------------
   11. SKILLS
   ---------------------------------------------------------- */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-12);
  align-items: start;
}
.skills-col-title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semi);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--clr-muted);
  margin-bottom: var(--sp-6);
}

/* Skill bars */
.skill-bars { display: flex; flex-direction: column; gap: var(--sp-5); }
.skill-row  { }
.skill-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--sp-2);
}
.skill-name { font-size: var(--fs-sm); font-weight: var(--fw-medium); color: var(--clr-text); }
.skill-pct  { font-size: var(--fs-xs); font-weight: var(--fw-bold);   color: var(--clr-accent); }
.skill-track {
  height: 8px;
  background: var(--clr-surface-2);
  border-radius: var(--r-full);
  overflow: hidden;
  border: 1px solid var(--clr-border);
}
.skill-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-accent-light));
  border-radius: var(--r-full);
  transition: width 1.2s var(--ease-out);
  position: relative;
}
.skill-fill::after {
  content: '';
  position: absolute;
  right: -1px; top: 50%;
  transform: translateY(-50%);
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--clr-highlight);
  box-shadow: 0 0 8px var(--clr-highlight);
}

/* Radial charts */
.radial-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-6);
  margin-bottom: var(--sp-8);
}
.radial-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  text-align: center;
}
.radial-svg  {
  width: 88px; height: 88px;
  transform: rotate(-90deg);
  filter: drop-shadow(0 4px 12px rgba(79,70,229,.2));
}
.radial-track { fill: none; stroke: var(--clr-surface-2); stroke-width: 8; }
.radial-fill  {
  fill: none;
  stroke: url(#radialGrad);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 251.2;
  stroke-dashoffset: 251.2;
  transition: stroke-dashoffset 1.4s var(--ease-out);
}
.radial-label {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--clr-text);
}
.radial-pct {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  color: var(--clr-accent);
}

/* ----------------------------------------------------------
   12. CERTIFICATES CAROUSEL
   ---------------------------------------------------------- */
.certificates-section { background: var(--clr-bg); }

.cert-carousel-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-8) 0 var(--sp-4);
  perspective: 1200px;
}

.cert-arrow {
  flex-shrink: 0;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  color: var(--clr-muted);
  display: grid; place-items: center;
  z-index: 10;
  box-shadow: var(--sh-md);
  transition: background var(--dur-fast), border-color var(--dur-fast), color var(--dur-fast), transform var(--dur-fast) var(--ease-spring);
}
.cert-arrow:hover {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
  color: #fff;
  transform: scale(1.1);
}
.cert-arrow--prev { margin-right: var(--sp-4); }
.cert-arrow--next { margin-left:  var(--sp-4); }

.cert-track {
  position: relative;
  width: 100%; max-width: 900px; height: 330px;
  display: flex; align-items: center; justify-content: center;
}
.cert-slide {
  position: absolute; width: 250px;
  cursor: pointer; user-select: none;
  transition: transform .55s cubic-bezier(.34,1.1,.64,1), opacity .45s ease;
}
.cert-inner {
  background: var(--clr-surface);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--sh-lg);
  border: 2px solid transparent;
  transition: border-color var(--dur-base), box-shadow var(--dur-base);
}
.cert-inner img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; pointer-events: none; }
.cert-lbl {
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--fs-sm); font-weight: var(--fw-semi);
  color: var(--clr-muted); text-align: center;
  background: var(--clr-surface);
  transition: color var(--dur-base);
}
.cert-slide[data-pos="active"]  { transform: translateX(0) scale(1) translateZ(0); opacity: 1; z-index: 5; }
.cert-slide[data-pos="active"] .cert-inner { border-color: var(--clr-accent); box-shadow: 0 20px 60px rgba(79,70,229,.35); }
.cert-slide[data-pos="active"] .cert-lbl   { color: var(--clr-accent); font-weight: var(--fw-bold); }
.cert-slide[data-pos="prev1"]  { transform: translateX(-210px) scale(.82) translateZ(-80px); opacity: .6; z-index: 4; }
.cert-slide[data-pos="next1"]  { transform: translateX(210px)  scale(.82) translateZ(-80px); opacity: .6; z-index: 4; }
.cert-slide[data-pos="prev2"]  { transform: translateX(-380px) scale(.65) translateZ(-160px); opacity: .3; z-index: 3; }
.cert-slide[data-pos="next2"]  { transform: translateX(380px)  scale(.65) translateZ(-160px); opacity: .3; z-index: 3; }
.cert-slide[data-pos="hidden"] { transform: translateX(0) scale(.4) translateZ(-300px); opacity: 0; z-index: 1; pointer-events: none; }

.cert-dots {
  display: flex; justify-content: center; gap: var(--sp-2);
  margin-top: var(--sp-4);
}
.cert-dot {
  width: 8px; height: 8px; border-radius: 50%; border: none;
  background: var(--clr-border); cursor: pointer;
  transition: background var(--dur-fast), width var(--dur-base), transform var(--dur-fast) var(--ease-spring);
}
.cert-dot.active { background: var(--clr-accent); width: 22px; border-radius: var(--r-full); }
.cert-dot:hover:not(.active) { background: var(--clr-accent-light); }
.cert-hint {
  text-align: center;
  font-size: var(--fs-xs);
  color: var(--clr-light);
  margin-top: var(--sp-3);
  letter-spacing: .04em;
}

/* Cert lightbox */
.cert-lightbox {
  position: fixed; inset: 0; z-index: 3000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity var(--dur-base);
}
.cert-lightbox.open { opacity: 1; pointer-events: all; }
.cert-lb-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.cert-lb-inner {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center; gap: var(--sp-4);
  width: 100%; max-width: 860px; padding: var(--sp-8);
  transform: scale(.94);
  transition: transform var(--dur-base) var(--ease-spring);
}
.cert-lightbox.open .cert-lb-inner { transform: scale(1); }
.cert-lb-imgwrap {
  width: 100%; max-height: 75vh;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--r-lg); overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,.7);
}
.cert-lb-img {
  max-width: 100%; max-height: 75vh;
  object-fit: contain; border-radius: var(--r-md); display: block;
  transition: opacity var(--dur-base);
}
.cert-lb-img.loading { opacity: 0; }
.cert-lb-close {
  position: absolute; top: var(--sp-2); right: var(--sp-2);
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2);
  color: rgba(255,255,255,.85); font-size: 1.2rem;
  display: grid; place-items: center;
  transition: background var(--dur-fast), transform var(--dur-fast) var(--ease-spring);
}
.cert-lb-close:hover { background: #ef4444; color: #fff; transform: scale(1.12); }
.cert-lb-cap {
  font-size: var(--fs-sm); font-weight: var(--fw-medium);
  color: rgba(255,255,255,.55); text-align: center;
}

/* ----------------------------------------------------------
   13. CONTACT
   ---------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--sp-12);
  align-items: start;
  max-width: 960px;
  margin-inline: auto;
}

/* Info column */
.contact-intro {
  font-size: var(--fs-md);
  color: var(--clr-muted);
  line-height: var(--lh-loose);
  margin-bottom: var(--sp-8);
}
.contact-items { display: flex; flex-direction: column; gap: var(--sp-5); }
.contact-item  { display: flex; align-items: flex-start; gap: var(--sp-4); }

.contact-icon {
  width: 46px; height: 46px;
  border-radius: var(--r-md);
  background: rgba(79,70,229,.1);
  border: 1px solid rgba(79,70,229,.2);
  display: grid; place-items: center;
  flex-shrink: 0;
  transition: background var(--dur-fast), transform var(--dur-fast) var(--ease-spring);
}
.contact-icon svg { width: 20px; height: 20px; color: var(--clr-accent); transition: color var(--dur-fast); }
.contact-item:hover .contact-icon {
  background: var(--clr-accent);
  transform: scale(1.08);
}
.contact-item:hover .contact-icon svg { color: #fff; }

.contact-lbl {
  display: block;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semi);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--clr-light);
  margin-bottom: var(--sp-1);
}
.contact-val {
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--clr-heading);
}
.contact-link { color: var(--clr-accent); }
.contact-link:hover { color: var(--clr-accent-light); text-decoration: underline; }

/* Form column */
.contact-form-col {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--r-lg);
  padding: var(--sp-8);
  box-shadow: var(--sh-md);
  position: relative;
  overflow: hidden;
}
/* Subtle top gradient accent */
.contact-form-col::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-highlight));
}

.contact-form { display: flex; flex-direction: column; gap: var(--sp-4); }
.form-group   { display: flex; flex-direction: column; gap: var(--sp-1); }
.form-lbl {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--clr-text);
}
.form-lbl span { color: var(--clr-accent); }

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--sp-3) var(--sp-4);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  color: var(--clr-text);
  background: var(--clr-bg);
  border: 1.5px solid var(--clr-border);
  border-radius: var(--r-md);
  resize: vertical;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast), background var(--dur-fast);
}
.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--clr-accent);
  background: var(--clr-surface);
  box-shadow: 0 0 0 3px rgba(79,70,229,.15);
}
.form-input::placeholder,
.form-textarea::placeholder { color: var(--clr-light); }
.form-input.invalid,
.form-textarea.invalid {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239,68,68,.12);
}
.form-err  { font-size: var(--fs-xs); color: #ef4444; min-height: 1em; }
.form-note {
  font-size: var(--fs-xs);
  color: var(--clr-light);
  text-align: center;
  margin-top: calc(-1 * var(--sp-2));
}

/* ----------------------------------------------------------
   14. FOOTER
   ---------------------------------------------------------- */
.site-footer {
  background: var(--clr-bg-alt);
  border-top: 1px solid var(--clr-border);
  padding-block: var(--sp-8);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-3);
}
.footer-copy  { font-size: var(--fs-sm); color: var(--clr-muted); }
.footer-link  { font-size: var(--fs-sm); color: var(--clr-accent); font-weight: var(--fw-medium); }
.footer-link:hover { text-decoration: underline; }

.footer-made {
  font-size: var(--fs-xs);
  color: var(--clr-muted);
  display: flex;
  align-items: center;
  gap: 4px;
  width: 100%;
  justify-content: center;
  padding-top: var(--sp-2);
  border-top: 1px solid var(--clr-border);
  margin-top: var(--sp-2);
}
.footer-heart {
  color: #e11d48;
  font-size: .9rem;
  animation: heartbeat 1.6s ease-in-out infinite;
}
@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  14%       { transform: scale(1.25); }
  28%       { transform: scale(1); }
  42%       { transform: scale(1.15); }
  70%       { transform: scale(1); }
}
.footer-weblance {
  font-weight: var(--fw-semi);
  color: var(--clr-accent);
  letter-spacing: .02em;
  transition: color var(--dur-fast), opacity var(--dur-fast);
}
.footer-weblance:hover { color: var(--clr-accent-light); text-decoration: none; opacity: .85; }

/* ----------------------------------------------------------
   15. SCROLL REVEALS
   ---------------------------------------------------------- */
.fade-up, .fade-left, .fade-right {
  opacity: 0;
  transition: opacity .65s var(--ease-out), transform .65s var(--ease-out);
}
.fade-up    { transform: translateY(32px); }
.fade-left  { transform: translateX(-32px); }
.fade-right { transform: translateX(32px); }
.fade-up.visible, .fade-left.visible, .fade-right.visible {
  opacity: 1;
  transform: translate(0);
}

/* Stagger delays */
.tl-item:nth-child(2)      { transition-delay: .12s; }
.tl-item:nth-child(3)      { transition-delay: .24s; }
.ach-stat:nth-child(2)     { transition-delay: .08s; }
.ach-stat:nth-child(3)     { transition-delay: .16s; }
.ach-stat:nth-child(4)     { transition-delay: .24s; }
.ach-stat:nth-child(5)     { transition-delay: .32s; }
.ach-card:nth-child(2)     { transition-delay: .08s; }
.ach-card:nth-child(3)     { transition-delay: .16s; }
.ach-card:nth-child(4)     { transition-delay: .24s; }
.ach-card:nth-child(5)     { transition-delay: .32s; }
.ach-card:nth-child(6)     { transition-delay: .40s; }
.rb-card:nth-child(2)      { transition-delay: .1s; }
.rb-card:nth-child(3)      { transition-delay: .2s; }
.rb-card:nth-child(4)      { transition-delay: .3s; }

/* ----------------------------------------------------------
   16. SCROLL PROGRESS BAR
   ---------------------------------------------------------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--clr-accent), var(--clr-highlight));
  z-index: 9999;
  width: 0%;
  transition: width .1s linear;
  border-radius: 0 var(--r-full) var(--r-full) 0;
}

/* ----------------------------------------------------------
   17. RESPONSIVE — TABLET (≤1024px)
   ---------------------------------------------------------- */
@media (max-width: 1024px) {
  .about-grid        { grid-template-columns: 200px 1fr; gap: var(--sp-8); }
  .stats-grid        { grid-template-columns: repeat(2, 1fr); }
  .skills-grid       { grid-template-columns: 1fr; gap: var(--sp-8); }
  .radial-grid       { grid-template-columns: repeat(4, 1fr); }
  .contact-grid      { grid-template-columns: 1fr; gap: var(--sp-8); max-width: 680px; }
  .ach-cards-grid    { grid-template-columns: repeat(2, 1fr); }
}

/* ----------------------------------------------------------
   17b. RESPONSIVE — NAV BREAKPOINT (≤960px)
   Collapse nav links into hamburger drawer at this width
   since 8 items overflow at narrower sizes.
   ---------------------------------------------------------- */
@media (max-width: 960px) {
  /* Hide desktop links, show hamburger */
  .nav-links    { display: none; }
  .nav-hamburger { display: flex; }
  .nav-backdrop  { display: block; pointer-events: none; }
  .nav-backdrop.visible { pointer-events: auto; }

  /* Shrink logo sub-text */
  .logo-name-sub { display: none; }
  .logo-name-primary { font-size: .88rem; }

  /* Drawer */
  .nav-links.open {
    display: flex;
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--clr-surface);
    border-top: 1px solid var(--clr-border);
    padding: var(--sp-3) var(--sp-4) var(--sp-6);
    gap: var(--sp-1);
    box-shadow: 0 20px 60px rgba(0,0,0,.2);
    z-index: 999;
    max-height: calc(100vh - var(--nav-h));
    overflow-y: auto;
    /* Slide-in animation */
    animation: drawerSlideIn var(--dur-base) var(--ease-out) forwards;
  }

  @keyframes drawerSlideIn {
    from { opacity: 0; transform: translateY(-12px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  [data-theme="dark"] .nav-links.open { background: var(--clr-surface); }

  .nav-link {
    padding: var(--sp-3) var(--sp-4);
    font-size: var(--fs-sm);
    border-radius: var(--r-md);
    color: var(--clr-muted) !important;
    border: 1px solid transparent;
  }
  .nav-link:hover,
  .nav-link.active {
    color: var(--clr-accent) !important;
    background: rgba(79,70,229,.08);
    border-color: rgba(79,70,229,.15);
  }
  .nav-link::after { display: none; }
  .nav-link--cta {
    margin: var(--sp-3) 0 0;
    text-align: center;
    padding: var(--sp-3) var(--sp-4);
    border-radius: var(--r-md);
    border: none;
    background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-light));
    color: #fff !important;
    box-shadow: 0 4px 16px rgba(79,70,229,.35);
  }
  .nav-link--cta:hover { transform: none; filter: brightness(1.08); }
}

/* ----------------------------------------------------------
   18. RESPONSIVE — MOBILE (≤768px)
   ---------------------------------------------------------- */
@media (max-width: 768px) {
  :root { --nav-h: 60px; }

  /* Sections */
  .section { padding-block: var(--sp-12); }
  .section-header { margin-bottom: var(--sp-8); }

  /* About */
  .about-grid      { grid-template-columns: 1fr; gap: var(--sp-8); }
  .about-photo-col { position: static; flex-direction: column; align-items: center; }
  .about-photo-frame { width: 170px; height: 170px; }
  .stats-grid      { grid-template-columns: repeat(2, 1fr); gap: var(--sp-3); }

  /* Hero */
  .hero-cta { flex-wrap: wrap; }
  .hero-cta .btn { flex: 1 1 130px; max-width: 200px; justify-content: center; }

  /* Achievements */
  .ach-cards-grid { grid-template-columns: 1fr; }
  .ach-stats-row  { gap: var(--sp-3); }

  /* Skills */
  .skills-grid { grid-template-columns: 1fr; gap: var(--sp-8); }
  .radial-grid { grid-template-columns: repeat(2, 1fr); }

  /* Certificates */
  .cert-track { height: 260px; }
  .cert-slide { width: 200px; }
  .cert-slide[data-pos="prev1"] { transform: translateX(-160px) scale(.78) translateZ(-60px); opacity: .55; }
  .cert-slide[data-pos="next1"] { transform: translateX(160px)  scale(.78) translateZ(-60px); opacity: .55; }
  .cert-slide[data-pos="prev2"], .cert-slide[data-pos="next2"] { opacity: 0; pointer-events: none; }
  .cert-arrow--prev { margin-right: var(--sp-2); }
  .cert-arrow--next { margin-left:  var(--sp-2); }

  /* Contact */
  .contact-grid      { grid-template-columns: 1fr; gap: var(--sp-8); }
  .contact-form-col  { padding: var(--sp-5); }

  /* Footer */
  .footer-inner { flex-direction: column; text-align: center; }
}

/* ----------------------------------------------------------
   19. RESPONSIVE — SMALL MOBILE (≤480px)
   ---------------------------------------------------------- */
@media (max-width: 480px) {
  .hero-title { font-size: 2.4rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: var(--sp-2); }
  .radial-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-track { height: 220px; }
  .cert-slide { width: 170px; }
  .cert-slide[data-pos="prev1"] { transform: translateX(-130px) scale(.72) translateZ(-40px); }
  .cert-slide[data-pos="next1"] { transform: translateX(130px)  scale(.72) translateZ(-40px); }
  .cert-lb-inner { padding: var(--sp-4); }
  .contact-form-col { padding: var(--sp-4); }
  .section-title { font-size: clamp(1.5rem, 7vw, 1.9rem); }
}

/* ----------------------------------------------------------
   20. REDUCED MOTION
   ---------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
  .fade-up, .fade-left, .fade-right { opacity: 1; transform: none; }
  .animate-fade-up { opacity: 1; transform: none; animation: none; }
}

/* ----------------------------------------------------------
   21. PRINT
   ---------------------------------------------------------- */
@media print {
  .nav-header, .hero-section, .cert-lightbox, .scroll-progress,
  .marquee-wrap, .cert-carousel-wrap, .cert-dots { display: none !important; }
  body { font-size: 11pt; color: #000; background: #fff; }
  .section { padding-block: 1.5rem; page-break-inside: avoid; }
  .tl-body, .ach-card, .rb-card { box-shadow: none; border: 1px solid #ccc; }
}