/* ═══════════════════════════════════════════════════════════════════════
   Tao Liu — Personal Portfolio v4 · iOS-inspired
   Dark-first · Glassmorphism · Particle canvas · iOS list rows · GIF layer
   ═══════════════════════════════════════════════════════════════════════ */

:root {
  --bg-primary: #06060d;
  --bg-secondary: #0c0c18;
  --bg-card: rgba(16,16,30,0.62);
  --bg-card-hover: rgba(22,22,42,0.75);
  --bg-glass: rgba(12,12,24,0.50);
  --bg-ios-group: rgba(18,18,32,0.45);

  --text-primary: #e8e8f2;
  --text-secondary: #9898b8;
  --text-muted: #6e6e88;

  --accent: #7c6ff7;
  --accent-glow: rgba(124,111,247,0.28);
  --accent-teal: #00cec9;
  --accent-warm: #fd79a8;

  --border-subtle: rgba(255,255,255,0.05);
  --border-card: rgba(255,255,255,0.08);
  --border-active: rgba(124,111,247,0.40);
  --border-ios: rgba(255,255,255,0.07);

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.5);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 60px var(--accent-glow);
  --shadow-card-hover: 0 16px 48px rgba(0,0,0,0.55), 0 0 0 1px rgba(124,111,247,0.12);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --radius-ios: 16px;

  --transition-fast: 150ms cubic-bezier(0.4,0,0.2,1);
  --transition-base: 300ms cubic-bezier(0.4,0,0.2,1);
  --transition-slow: 500ms cubic-bezier(0.4,0,0.2,1);
  --transition-spring: 500ms cubic-bezier(0.34,1.56,0.64,1);
  --transition-ios: 280ms cubic-bezier(0.25,0.1,0.25,1);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;

  --navbar-height: 64px;
  --max-width: 1100px;
  --content-width: 1000px;
}

/* ── Light Theme (iOS-style light) ── */
[data-theme="light"] {
  --bg-primary: #f2f2f7;
  --bg-secondary: #e8e8ed;
  --bg-card: rgba(255,255,255,0.80);
  --bg-card-hover: rgba(255,255,255,0.96);
  --bg-glass: rgba(255,255,255,0.65);
  --bg-ios-group: rgba(255,255,255,0.82);

  --text-primary: #1c1c1e;
  --text-secondary: #3a3a3c;
  --text-muted: #6e6e73;

  --border-subtle: rgba(0,0,0,0.06);
  --border-card: rgba(0,0,0,0.10);
  --border-ios: rgba(0,0,0,0.07);

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 2px 12px rgba(0,0,0,0.05);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.06);
  --shadow-glow: 0 0 50px rgba(124,111,247,0.10);
  --shadow-card-hover: 0 4px 16px rgba(0,0,0,0.06), 0 0 0 1px rgba(124,111,247,0.15);
}

/* ═══════════════════════════════════════════════════════════════════════
   RESET & BASE
   ═══════════════════════════════════════════════════════════════════════ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body{
  font-family:var(--font-sans);font-weight:400;font-size:1rem;line-height:1.7;
  color:var(--text-primary);background:var(--bg-primary);overflow-x:hidden;
  transition:background-color var(--transition-slow),color var(--transition-slow);
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}

::-webkit-scrollbar{width:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--text-muted);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--accent)}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

/* ═══════════════════════════════════════════════════════════════════════
   GIF BACKGROUND LAYER (subtle)
   ═══════════════════════════════════════════════════════════════════════ */
.gif-bg-layer{
  position:fixed;inset:0;z-index:-3;pointer-events:none;opacity:0.12;
  transition:opacity var(--transition-slow);
}
.gif-bg-layer img{width:100%;height:100%;object-fit:cover;filter:blur(1px) saturate(0.6)}
[data-theme="light"] .gif-bg-layer{opacity:0.06}

/* ═══════════════════════════════════════════════════════════════════════
   SCROLL PROGRESS
   ═══════════════════════════════════════════════════════════════════════ */
.scroll-progress{
  position:fixed;top:0;left:0;height:2px;
  background:linear-gradient(90deg,var(--accent),var(--accent-teal),var(--accent-warm));
  z-index:1001;width:0%;border-radius:0 1px 1px 0;transition:width 80ms linear;
}

/* ═══════════════════════════════════════════════════════════════════════
   CURSOR GLOW
   ═══════════════════════════════════════════════════════════════════════ */
.cursor-glow{
  position:fixed;pointer-events:none;z-index:-1;width:360px;height:360px;
  background:radial-gradient(circle,rgba(124,111,247,0.09) 0%,rgba(0,206,201,0.03) 35%,transparent 70%);
  border-radius:50%;transform:translate(-50%,-50%);opacity:0;transition:opacity 0.4s;
}
.cursor-glow.visible{opacity:1}

/* ═══════════════════════════════════════════════════════════════════════
   PARTICLE CANVAS & BUBBLES
   ═══════════════════════════════════════════════════════════════════════ */
#particle-canvas{position:fixed;inset:0;z-index:-2;pointer-events:none}
#bouncing-balls-container{position:fixed;inset:0;pointer-events:none;z-index:-1}
.bouncing-ball{
  position:absolute;border-radius:50%;background-size:cover;background-position:center;
  opacity:0.25;box-shadow:0 0 28px rgba(124,111,247,0.12),0 4px 10px rgba(0,0,0,0.25);
  will-change:transform;transition:opacity 0.8s;
}
.bouncing-ball:hover{opacity:0.5}
[data-theme="light"] .bouncing-ball{opacity:0.18}
[data-theme="light"] .bouncing-ball:hover{opacity:0.4}
/* iOS group — stronger presence in light mode */
[data-theme="light"] .articles-grid{box-shadow:0 1px 4px rgba(0,0,0,0.04)}

/* ═══════════════════════════════════════════════════════════════════════
   NAV RACER — MapleStory-style multi-car racing track 🏁
   ═══════════════════════════════════════════════════════════════════════ */
.nav-racer-track{
  position:absolute;bottom:0;left:0;right:0;height:26px;
  overflow:hidden;pointer-events:none;z-index:0;
}
/* ── Road surface (rainbow stripe + asphalt) ── */
.racer-road{
  position:absolute;bottom:0;left:0;right:0;height:100%;
  /* rainbow stripe — animated gradient with rhythm */
  --rainbow-1:#ff6b6b;--rainbow-2:#ff922b;--rainbow-3:#ffd43b;
  --rainbow-4:#69db7c;--rainbow-5:#4dabf7;--rainbow-6:#845ef7;
  background:
    /* rainbow glow line */
    linear-gradient(0deg,transparent 0px,transparent 2px,
      var(--rainbow-1) 2px,var(--rainbow-2) 3px,var(--rainbow-3) 4px,
      var(--rainbow-4) 5px,var(--rainbow-5) 5.5px,var(--rainbow-6) 6px,
      transparent 6px,transparent 7px),
    /* asphalt */
    linear-gradient(0deg,#3a3a45 0px,#3a3a45 16px,#2a2a32 16px,#2a2a32 18px,transparent 18px),
    /* center dashed line */
    repeating-linear-gradient(90deg,transparent 0px,transparent 24px,#ffcc02 24px,#ffcc02 32px),
    /* side line */
    repeating-linear-gradient(90deg,transparent 0px,transparent 18px,#ffffff 18px,#ffffff 22px,transparent 22px,transparent 24px);
  background-position:0 0,0 0,0 8px,0 15px;
  background-size:100% 100%,100% 100%,auto 2px,auto 1.5px;
  animation:roadScroll 0.55s linear infinite,rainbowPulse 1.8s ease-in-out infinite;
  opacity:0.65;
}
@keyframes roadScroll{0%{background-position:0 0,0 0,-24px 8px,-24px 15px}100%{background-position:0 0,0 0,0 8px,0 15px}}
@keyframes rainbowPulse{
  0%,100%{filter:brightness(1) saturate(1)}
  25%{filter:brightness(1.4) saturate(1.3)}
  50%{filter:brightness(1) saturate(1.1)}
  75%{filter:brightness(1.35) saturate(1.25)}
}
/* ── Shared car styles ── */
.racer-car{
  position:absolute;bottom:4px;z-index:2;
  font-size:1.15rem;filter:drop-shadow(0 2px 4px rgba(0,0,0,0.5));
  animation-timing-function:cubic-bezier(0.42,0,0.58,1);animation-iteration-count:infinite;
}
/* Exhaust puff for all cars */
.racer-car::after{
  content:'💨';position:absolute;right:-12px;top:-4px;
  font-size:0.55rem;opacity:0.75;
  animation:exhaustPuff 0.3s ease-out infinite;
}
@keyframes exhaustPuff{0%,100%{opacity:0.85;transform:scale(1)}50%{opacity:0.25;transform:scale(0.5)}}
/* ── Car 1: F1 Racer (fastest) ── */
.car-f1{
  animation-name:carF1Drive;animation-duration:3.8s;animation-delay:0s;
  filter:drop-shadow(0 0 8px rgba(255,80,50,0.7)) drop-shadow(0 2px 4px rgba(0,0,0,0.5));
  font-size:1.25rem;
}
@keyframes carF1Drive{
  0%{left:-70px;transform:translateY(0)}
  18%{transform:translateY(-3px)}
  36%{transform:translateY(-1px)}
  54%{transform:translateY(-3px)}
  72%{transform:translateY(0)}
  100%{left:calc(100% + 70px);transform:translateY(0)}
}
/* ── Car 2: Blue SUV (medium) ── */
.car-suv{
  animation-name:carSUVDrive;animation-duration:5.2s;animation-delay:1.2s;
}
@keyframes carSUVDrive{
  0%{left:-70px;transform:translateY(0)}
  12%{transform:translateY(-2px)}
  28%{transform:translateY(-1px)}
  44%{transform:translateY(-2px)}
  60%{transform:translateY(0)}
  100%{left:calc(100% + 70px);transform:translateY(0)}
}
/* ── Car 3: Red Car (medium-fast) ── */
.car-red{
  animation-name:carRedDrive;animation-duration:4.6s;animation-delay:2.8s;
  filter:drop-shadow(0 0 6px rgba(255,60,40,0.6)) drop-shadow(0 2px 4px rgba(0,0,0,0.5));
}
@keyframes carRedDrive{
  0%{left:-70px;transform:translateY(0)}
  15%{transform:translateY(-2px)}
  35%{transform:translateY(-3px)}
  55%{transform:translateY(-1px)}
  75%{transform:translateY(-1px)}
  100%{left:calc(100% + 70px);transform:translateY(0)}
}
/* ── Car 4: Police Car (slow, siren flash) ── */
.car-cop{
  animation-name:carCopDrive;animation-duration:7s;animation-delay:3.5s;
  font-size:1.3rem;
}
.car-cop::before{
  content:'';position:absolute;top:-6px;left:50%;transform:translateX(-50%);
  width:8px;height:4px;border-radius:2px;
  background:#ff3333;animation:sirenFlash 0.2s step-end infinite;
}
@keyframes sirenFlash{0%,100%{background:#ff3333}50%{background:#3333ff}}
@keyframes carCopDrive{
  0%{left:-70px;transform:translateY(0)}
  10%{transform:translateY(-2px)}
  25%{transform:translateY(0)}
  40%{transform:translateY(-2px)}
  55%{transform:translateY(-1px)}
  70%{transform:translateY(0)}
  100%{left:calc(100% + 70px);transform:translateY(0)}
}
/* ── NAME TAG: TAO LIU · 刘涛 (MapleStory bouncing nameplate) ── */
.racer-name-tag{
  position:absolute;bottom:4px;z-index:3;
  animation:nameBounce 6.5s linear infinite;animation-delay:0.6s;
}
.name-tag-inner{
  display:block;white-space:nowrap;
  background:linear-gradient(180deg,#ffd54f 0%,#ffb300 100%);
  color:#2d1810;font-family:var(--font-sans);
  font-size:0.65rem;font-weight:800;letter-spacing:0.04em;
  padding:2px 10px;border-radius:10px;
  border:1.5px solid #e6a200;
  box-shadow:
    0 2px 0 #cc8800,
    0 3px 8px rgba(255,180,0,0.5),
    inset 0 1px 0 rgba(255,255,255,0.4);
  text-shadow:0 0 4px rgba(255,255,255,0.5);
}
/* Tag arrow/bobber */
.racer-name-tag::after{
  content:'';position:absolute;bottom:-2px;left:50%;transform:translateX(-50%);
  width:0;height:0;
  border-left:5px solid transparent;
  border-right:5px solid transparent;
  border-top:5px solid #e6a200;
}
@keyframes nameBounce{
  0%{left:-140px;transform:translateY(0) scale(1)}
  4%{transform:translateY(-3px) scale(1.08)}
  8%{transform:translateY(0) scale(0.95)}
  12%{transform:translateY(-2px) scale(1.05)}
  16%{transform:translateY(0) scale(1)}
  20%{transform:translateY(-3px) scale(1.07)}
  24%{transform:translateY(-1px) scale(0.98)}
  28%{transform:translateY(-2px) scale(1.04)}
  32%{transform:translateY(0) scale(1)}
  36%{transform:translateY(-2px) scale(1.05)}
  40%{transform:translateY(0) scale(0.97)}
  44%{transform:translateY(-3px) scale(1.06)}
  48%{transform:translateY(-1px) scale(1)}
  52%{transform:translateY(-2px) scale(1.04)}
  56%{transform:translateY(0) scale(0.98)}
  100%{left:calc(100% + 140px);transform:translateY(0) scale(1)}
}
/* ── Decorations: stars & coins ── */
.racer-deco{
  position:absolute;z-index:1;pointer-events:none;
  font-size:0.6rem;animation-timing-function:ease-in-out;animation-iteration-count:infinite;
}
.deco-star1{animation:starFloat 3s linear infinite;animation-delay:0s;bottom:12px;left:10%}
.deco-star2{animation:starFloat 3.5s linear infinite;animation-delay:1.5s;bottom:10px;left:60%}
.deco-coin{animation:coinBounce 4s ease-in-out infinite;animation-delay:0.8s;bottom:11px;left:35%}
.deco-meso{animation:coinBounce 4.5s ease-in-out infinite;animation-delay:2.5s;bottom:13px;left:78%}
@keyframes starFloat{
  0%,100%{transform:translateY(0) rotate(0deg);opacity:0.7}
  25%{transform:translateY(-7px) rotate(90deg);opacity:1}
  50%{transform:translateY(0) rotate(180deg);opacity:0.7}
  75%{transform:translateY(-5px) rotate(270deg);opacity:0.9}
}
@keyframes coinBounce{
  0%,100%{transform:translateY(0) scale(1);opacity:0.8}
  15%{transform:translateY(-8px) scale(1.2);opacity:1}
  30%{transform:translateY(0) scale(0.9);opacity:0.8}
  50%{transform:translateY(-6px) scale(1.15);opacity:0.95}
  65%{transform:translateY(0) scale(0.95);opacity:0.85}
  80%{transform:translateY(-4px) scale(1.1);opacity:0.9}
}
/* ── Pause all on navbar hover ── */
.navbar:hover .racer-car,
.navbar:hover .racer-name-tag,
.navbar:hover .racer-deco,
.navbar:hover .racer-road{animation-play-state:paused}
/* ── Light theme ── */
[data-theme="light"] .racer-road{
  --rainbow-1:#ff8787;--rainbow-2:#ffa94d;--rainbow-3:#ffe066;
  --rainbow-4:#8ce99a;--rainbow-5:#74c0fc;--rainbow-6:#9775fa;
  opacity:0.55;
}
[data-theme="light"] .racer-car{filter:drop-shadow(0 2px 3px rgba(0,0,0,0.3))}
[data-theme="light"] .car-f1{filter:drop-shadow(0 0 6px rgba(255,80,50,0.5)) drop-shadow(0 2px 3px rgba(0,0,0,0.3))}
[data-theme="light"] .car-red{filter:drop-shadow(0 0 4px rgba(255,60,40,0.4)) drop-shadow(0 2px 3px rgba(0,0,0,0.3))}

/* ═══════════════════════════════════════════════════════════════════════
   NAVIGATION
   ═══════════════════════════════════════════════════════════════════════ */
.navbar{
  position:fixed;top:0;width:100%;height:var(--navbar-height);
  background:rgba(8,8,16,0.70);backdrop-filter:blur(28px) saturate(150%);
  -webkit-backdrop-filter:blur(28px) saturate(150%);
  border-bottom:1px solid var(--border-subtle);z-index:1000;
  transition:height var(--transition-base),background var(--transition-base),box-shadow var(--transition-base);
}
[data-theme="light"] .navbar{background:rgba(242,242,247,0.72)}
.navbar.scrolled{
  background:rgba(8,8,16,0.88);box-shadow:0 1px 24px rgba(0,0,0,0.30);
}
[data-theme="light"] .navbar.scrolled{background:rgba(242,242,247,0.90);box-shadow:0 1px 16px rgba(0,0,0,0.06)}

.nav-container{max-width:var(--max-width);margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;align-items:center;height:100%}
.nav-logo a{font-weight:700;font-size:1.05rem;color:var(--text-primary);letter-spacing:-0.02em;transition:color var(--transition-fast)}
.nav-logo a:hover{color:var(--accent)}
.nav-menu{display:flex;list-style:none;align-items:center;gap:0.1rem}
.nav-link{font-size:0.88rem;font-weight:500;color:var(--text-secondary);padding:0.4rem 0.85rem;border-radius:var(--radius-full);transition:all var(--transition-fast)}
.nav-link:hover{color:var(--text-primary);background:rgba(124,111,247,0.08)}
.nav-link.active{background:rgba(124,111,247,0.13);color:var(--accent);font-weight:600}

.theme-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;background:transparent;border:1px solid var(--border-card);
  border-radius:50%;color:var(--text-secondary);cursor:pointer;font-size:0.88rem;
  transition:all var(--transition-fast);margin-left:0.3rem;flex-shrink:0;
}
.theme-toggle:hover{color:var(--accent-warm);border-color:var(--accent-warm);box-shadow:0 0 16px rgba(253,121,168,0.18)}

.nav-toggle{display:none;flex-direction:column;cursor:pointer;gap:5px}
.bar{width:22px;height:2px;background:var(--text-primary);border-radius:2px;transition:all var(--transition-base)}

/* ═══════════════════════════════════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════════════════════════════════ */
.hero{
  min-height:100vh;display:flex;align-items:flex-start;justify-content:center;
  padding-top:calc(var(--navbar-height) + 2rem);
  padding-bottom:4rem;
  padding-left:24px;padding-right:24px;
  text-align:center;position:relative;
}
.hero .container{max-width:900px;width:100%;position:relative;z-index:1}
.hero-content{display:flex;flex-direction:column;align-items:center;gap:1.5rem}
.hero-image{flex-shrink:0;position:relative}
.profile-img{
  width:240px;height:240px;border-radius:50%;object-fit:cover;
  border:2px solid var(--border-card);
  animation:avatarGlow 4s ease-in-out infinite;
  transition:all var(--transition-base);
  will-change:transform,box-shadow;
  transform:translateZ(0);
}
@keyframes avatarGlow{
  0%,100%{box-shadow:0 0 0 6px rgba(124,111,247,0.05),0 0 40px var(--accent-glow)}
  50%{box-shadow:0 0 0 14px rgba(124,111,247,0.02),0 0 70px rgba(124,111,247,0.32)}
}
.profile-img:hover{transform:scale(1.05);animation:none;box-shadow:0 0 0 14px rgba(124,111,247,0.07),0 0 70px rgba(124,111,247,0.38)}

.hero-text{display:flex;flex-direction:column;align-items:center;gap:0.75rem}
.hero-title{
  font-weight:800;font-size:clamp(2rem,5vw,3rem);letter-spacing:-0.04em;line-height:1.15;
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent-teal) 40%,var(--accent-warm) 70%,var(--accent) 100%);
  background-size:300% 300%;
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  animation:gradientFlow 6s ease-in-out infinite;
}
@keyframes gradientFlow{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.chinese-name{font-size:0.5em;font-weight:400;opacity:0.65;background:none;-webkit-text-fill-color:var(--text-secondary);margin-left:0.15em}
.hero-subtitle{font-size:1.2rem;font-weight:350;color:var(--text-secondary);font-style:italic;max-width:500px}

.hero-info{display:flex;flex-wrap:wrap;justify-content:center;gap:0.45rem}
.info-item{
  display:inline-flex;align-items:center;gap:0.4rem;
  padding:0.35rem 0.95rem;background:var(--bg-glass);border:1px solid var(--border-card);
  border-radius:var(--radius-full);font-size:0.88rem;color:var(--text-secondary);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  transition:all var(--transition-fast);
}
.info-item:hover{border-color:var(--accent);color:var(--text-primary)}
.info-item i{font-size:0.78rem;opacity:0.6}

.social-links{display:flex;flex-wrap:wrap;justify-content:center;gap:0.6rem}
.social-link{
  display:flex;align-items:center;justify-content:center;
  width:40px;height:40px;background:var(--bg-glass);border:1px solid var(--border-card);border-radius:50%;
  color:var(--text-secondary);font-size:1rem;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  transition:all var(--transition-spring);position:relative;overflow:visible;
}
.social-link span{display:none}
.social-link:hover{color:#fff;transform:translateY(-3px) scale(1.08);width:auto;border-radius:var(--radius-full);padding:0 0.9rem;gap:0.3rem}
.social-link:hover span{display:inline;font-size:0.76rem;font-weight:500;white-space:nowrap}
.social-link.email:hover{background:#ea4335;border-color:#ea4335;box-shadow:0 4px 20px rgba(234,67,53,0.28)}
.social-link.twitter:hover{background:#1da1f2;border-color:#1da1f2;box-shadow:0 4px 20px rgba(29,161,242,0.28)}
.social-link.github:hover{background:#6e40c9;border-color:#6e40c9;box-shadow:0 4px 20px rgba(110,64,201,0.28)}
.social-link.team:hover{background:#00cec9;border-color:#00cec9;box-shadow:0 4px 20px rgba(0,206,201,0.28)}
.social-link.hf:hover{background:#ff9d00;border-color:#ff9d00;box-shadow:0 4px 20px rgba(255,157,0,0.28)}
.social-link.stackoverflow:hover{background:#f48225;border-color:#f48225;box-shadow:0 4px 20px rgba(244,130,37,0.28)}

.hero .about-content{
  margin-top:2rem;padding-top:2rem;border-top:1px solid var(--border-subtle);
  text-align:left;max-width:var(--content-width);
}
.hero .about-content p{font-size:1.02rem;line-height:1.85;color:var(--text-secondary);margin-bottom:1.4rem}
.hero .about-content p strong{color:var(--text-primary);font-weight:600}
.hero .about-content a{color:var(--accent);border-bottom:1px solid transparent;transition:border-color var(--transition-fast)}
.hero .about-content a:hover{border-bottom-color:var(--accent)}

/* ═══════════════════════════════════════════════════════════════════════
   READING CARD
   ═══════════════════════════════════════════════════════════════════════ */
.internship-notice{
  background:var(--bg-card);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--border-card);border-left:3px solid var(--accent);
  border-radius:var(--radius-ios);padding:1.3rem 1.5rem;
  display:flex;gap:1rem;align-items:flex-start;position:relative;overflow:hidden;
  transition:all var(--transition-base);
}
.internship-notice::after{
  content:'';position:absolute;left:0;top:0;width:3px;height:100%;
  background:linear-gradient(180deg,var(--accent),var(--accent-teal),var(--accent-warm));
  background-size:100% 200%;animation:borderFlow 3s ease-in-out infinite;
}
@keyframes borderFlow{0%,100%{background-position:0% 0%}50%{background-position:0% 100%}}
.internship-notice:hover{box-shadow:var(--shadow-card-hover)}
.notice-icon{font-size:1.8rem;flex-shrink:0;animation:iconPulse 3s ease-in-out infinite}
@keyframes iconPulse{0%,100%{transform:scale(1)}50%{transform:scale(1.12)}}
.notice-content h3{font-size:1.08rem;font-weight:600;color:var(--text-primary);margin-bottom:0.3rem}
.notice-content p{font-size:0.95rem;color:var(--text-secondary);line-height:1.55;margin-bottom:0}

/* ═══════════════════════════════════════════════════════════════════════
   SECTION COMMON
   ═══════════════════════════════════════════════════════════════════════ */
section{padding:4.5rem 0}
.section-title{
  font-weight:700;font-size:clamp(1.5rem,3.5vw,2.1rem);text-align:center;color:var(--text-primary);
  letter-spacing:-0.02em;margin-bottom:0.5rem;
}
.publications-note{text-align:center;font-style:italic;color:var(--text-muted);font-size:0.85rem;margin-bottom:2.5rem}

/* ═══════════════════════════════════════════════════════════════════════
   AWARDS / TIMELINE
   ═══════════════════════════════════════════════════════════════════════ */
.awards{background:transparent}
.awards-list{max-width:680px;margin:0 auto;position:relative;padding-left:30px}
.awards-list::before{
  content:'';position:absolute;left:11px;top:4px;bottom:4px;width:2px;
  background:linear-gradient(180deg,var(--accent) 0%,var(--accent-teal) 50%,rgba(255,255,255,0.03) 100%);
  border-radius:1px;
}
.award-item{
  position:relative;display:grid;grid-template-columns:auto 1fr;gap:1rem;
  padding:1.1rem 1.3rem;margin-bottom:0.8rem;
  background:var(--bg-card);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--border-card);border-radius:var(--radius-ios);
  transition:all var(--transition-ios);
}
.award-item:hover{box-shadow:var(--shadow-card-hover);border-color:var(--border-active);transform:translateX(4px)}
.award-item::before{
  content:'';position:absolute;left:-24px;top:1.4rem;
  width:9px;height:9px;background:var(--accent);border-radius:50%;
  box-shadow:0 0 12px var(--accent-glow);border:2px solid var(--bg-primary);
  transition:box-shadow var(--transition-base);
}
.award-item:hover::before{box-shadow:0 0 22px var(--accent-glow),0 0 36px rgba(124,111,247,0.25)}
.award-year{
  font-size:0.75rem;font-weight:600;color:#fff;background:var(--accent);
  padding:0.18rem 0.6rem;border-radius:var(--radius-full);white-space:nowrap;height:fit-content;text-align:center;
}
.award-content h3{font-size:1.05rem;font-weight:600;color:var(--text-primary);margin-bottom:0.25rem;line-height:1.4}
.award-content p{color:var(--text-secondary);font-size:0.92rem;line-height:1.5}
.award-content p a{color:var(--accent-teal);border-bottom:1px solid transparent;transition:border-color var(--transition-fast)}
.award-content p a:hover{border-bottom-color:var(--accent-teal)}

/* ═══════════════════════════════════════════════════════════════════════
   ARTICLES — iOS Grouped List Style
   ═══════════════════════════════════════════════════════════════════════ */
.articles-grid{
  display:flex;flex-direction:column;gap:0;
  max-width:var(--max-width);margin:0 auto;
  background:var(--bg-ios-group);
  border:1px solid var(--border-card);
  border-radius:var(--radius-ios);
  overflow:hidden;
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
}

.publication-article{
  position:relative;
  display:flex;align-items:center;gap:1.2rem;
  padding:1.1rem 1.5rem;
  background:transparent;
  transition:all var(--transition-ios);
  cursor:pointer;
}
.publication-article:hover{background:var(--bg-card-hover)}
/* iOS separator between rows */
.publication-article+.publication-article{border-top:1px solid var(--border-ios)}

/* Number badge — iOS-style rounded square */
.article-num{
  display:flex;align-items:center;justify-content:center;
  width:42px;height:42px;flex-shrink:0;
  font-size:0.9rem;font-weight:700;
  background:linear-gradient(135deg,var(--accent),var(--accent-teal));
  color:#fff;border-radius:10px;
  letter-spacing:-0.02em;
  transition:all var(--transition-ios);
}
.publication-article:hover .article-num{transform:scale(1.06);box-shadow:0 4px 16px var(--accent-glow)}

/* Article info block */
.article-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:0.15rem}
.article-title{
  font-size:1.05rem;font-weight:600;color:var(--text-primary);
  line-height:1.35;margin:0;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.article-title a{color:inherit;transition:color var(--transition-fast)}
.article-title a:hover{color:var(--accent)}
.article-meta{font-size:0.82rem;color:var(--text-muted);display:flex;align-items:center;gap:0.4rem}
.article-excerpt{
  font-size:0.9rem;color:var(--text-secondary);line-height:1.45;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}

/* iOS chevron arrow */
.article-chevron{
  flex-shrink:0;color:var(--text-muted);font-size:0.75rem;
  transition:transform var(--transition-ios);
}
.publication-article:hover .article-chevron{transform:translateX(3px);color:var(--accent)}

/* Hide old elements */
.post-meta,.post-footer,.publication-article .content,.read-more,.article-divider{display:none}


/* ═══════════════════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════════════════ */
.footer{
  background:var(--bg-secondary);border-top:1px solid var(--border-subtle);
  padding:2.5rem 0;text-align:center;
}
.footer-content p{color:var(--text-muted);font-size:0.8rem;margin:0}
.footer-dino{display:inline-block;margin-top:0.5rem;cursor:pointer;opacity:0.4;transition:all var(--transition-base)}
.footer-dino:hover{opacity:1;animation:dinoHop 0.5s ease}
.footer-dino img{width:34px;height:34px;display:block}
@keyframes dinoHop{0%{transform:translateY(0) rotate(0deg)}30%{transform:translateY(-20px) rotate(-6deg)}60%{transform:translateY(-5px) rotate(3deg)}100%{transform:translateY(0) rotate(0deg)}}

/* ═══════════════════════════════════════════════════════════════════════
   BACK TO TOP
   ═══════════════════════════════════════════════════════════════════════ */
.back-to-top{
  position:fixed;bottom:28px;right:28px;width:40px;height:40px;
  background:var(--bg-glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--border-card);border-radius:50%;
  color:var(--text-secondary);font-size:0.9rem;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transition:all var(--transition-base);z-index:999;
}
.back-to-top.visible{opacity:1;visibility:visible}
.back-to-top:hover{color:#fff;background:var(--accent);border-color:var(--accent);box-shadow:0 4px 22px var(--accent-glow);transform:translateY(-3px) rotate(360deg)}

/* ═══════════════════════════════════════════════════════════════════════
   SCROLL ANIMATIONS
   ═══════════════════════════════════════════════════════════════════════ */
.scroll-animate{opacity:0;transform:translateY(22px);transition:opacity 0.7s ease,transform 0.7s cubic-bezier(0.4,0,0.2,1)}
.scroll-animate.animate{opacity:1;transform:translateY(0)}
.hero-content>*{animation:fadeInUp 0.8s ease forwards}
.hero-text>*{opacity:0;animation:fadeInUp 0.8s ease forwards}
.hero-text>*:nth-child(1){animation-delay:0.1s}
.hero-text>*:nth-child(2){animation-delay:0.22s}
.hero-text>*:nth-child(3){animation-delay:0.34s}
.hero-text>*:nth-child(4){animation-delay:0.46s}
@keyframes fadeInUp{from{opacity:0;transform:translateY(28px)}to{opacity:1;transform:translateY(0)}}

/* ═══════════════════════════════════════════════════════════════════════
   RESPONSIVE — Tablet
   ═══════════════════════════════════════════════════════════════════════ */
@media(max-width:768px){
  .container{padding:0 18px}
  .nav-menu{position:fixed;left:-100%;top:var(--navbar-height);flex-direction:column;background:rgba(8,8,16,0.95);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);width:100%;text-align:center;transition:left var(--transition-base);padding:1rem 0 0.8rem;gap:0.15rem;border-bottom:1px solid var(--border-subtle)}
  [data-theme="light"] .nav-menu{background:rgba(242,242,247,0.95)}
  .nav-menu.active{left:0}
  .nav-toggle{display:flex}
  .nav-toggle.active .bar:nth-child(2){opacity:0}
  .nav-toggle.active .bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle.active .bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

  .profile-img{width:180px;height:180px}
  .hero-title{font-size:1.7rem}

  .publication-article{padding:1rem 1.2rem;gap:0.9rem}
  .article-num{width:36px;height:36px;font-size:0.8rem}
  .article-title{font-size:0.88rem}
  .article-excerpt{display:none}

  .award-item{grid-template-columns:1fr;gap:0.4rem}
  .award-year{width:fit-content}
  .social-links{gap:0.4rem}
  .social-link{width:36px;height:36px;font-size:0.9rem}
  .internship-notice{flex-direction:column;gap:0.6rem}
  section{padding:3.5rem 0}
  .cursor-glow{display:none}
}

/* ── Mobile ── */
@media(max-width:480px){
  .container{padding:0 14px}
  .profile-img{width:160px;height:160px}
  .hero-title{font-size:1.4rem}
  .hero-subtitle{font-size:0.85rem}
  .hero-info{gap:0.3rem}
  .info-item{font-size:0.74rem;padding:0.25rem 0.65rem}
  .section-title{font-size:1.3rem}
  .articles-grid{border-radius:var(--radius-md)}
  .publication-article{padding:0.9rem 1rem;gap:0.7rem}
  .article-num{width:32px;height:32px;font-size:0.72rem;border-radius:8px}
  .article-title{font-size:0.84rem}
  .awards-list{padding-left:22px}
  .award-item{padding:0.85rem}
  .award-item::before{left:-17px;width:7px;height:7px}
  .awards-list::before{left:9px}
  .back-to-top{bottom:16px;right:12px;width:34px;height:34px}
}

/* ═══════════════════════════════════════════════════════════════════════
   FIREWORK CANVAS OVERLAY
   ═══════════════════════════════════════════════════════════════════════ */
#firework-canvas{
  position:fixed;inset:0;z-index:9997;pointer-events:none;
  opacity:0;transition:opacity 0.6s ease;
}
#firework-canvas.active{opacity:1}
#firework-canvas.fade-out{opacity:0;transition:opacity 1.5s ease}

/* ═══════════════════════════════════════════════════════════════════════
   3D EARTH OVERLAY — full-viewport canvas · transparent
   ═══════════════════════════════════════════════════════════════════════ */
.earth-overlay{
  position:fixed;inset:0;z-index:9996;
  display:flex;align-items:center;justify-content:center;
  background:transparent;pointer-events:none;
  opacity:0;transition:opacity 0.65s cubic-bezier(0.32,0.72,0,1);
}
.earth-overlay.active{opacity:1}
.earth-container{
  position:fixed;inset:0;
  transform:scale(0.92);opacity:0;
  transition:transform 0.7s cubic-bezier(0.32,0.72,0,1),opacity 0.5s ease;
}
.earth-overlay.active .earth-container{transform:scale(1);opacity:1}
.earth-canvas{display:block;width:100%;height:100%}

/* ═══════════════════════════════════════════════════════════════════════
   PRINT
   ═══════════════════════════════════════════════════════════════════════ */
@media print{
  .navbar,.nav-toggle,.social-links,.footer,.back-to-top,.theme-toggle,.footer-dino,
  .scroll-progress,.cursor-glow,#particle-canvas,#bouncing-balls-container,#firework-canvas,.gif-bg-layer{display:none!important}
  body{background:#fff;color:#000}
  .hero{min-height:auto;padding:1rem 0}
  section{padding:1rem 0;break-inside:avoid}
  .publication-article{break-inside:avoid;border:1px solid #ddd;box-shadow:none;background:#fff;color:#000}
}