/* ============================================================
   STYLE.CSS — Bibhash Mitra Portfolio
   5 Themes · Cursor · Scroll-driven animations · Carousel
   ============================================================ */

/* === THEME VARIABLES === */
:root, [data-theme="dark"] {
  --bg: #06060f; --surface: #0d0d1e; --surface-2: #131326;
  --accent: oklch(72% 0.20 210); --accent-2: oklch(63% 0.22 285);
  --text: #c2c7df; --text-muted: #606480;
  --border: rgba(130,140,200,0.1); --border-hover: rgba(130,140,200,0.28);
  --heading-color: #eaecf8; --card-bg: #131326;
  --hero-grad: linear-gradient(135deg,#eaecf8 0%,oklch(82% 0.12 220) 40%,oklch(70% 0.22 285) 100%);
  --chart-grid: rgba(130,140,200,0.14); --chart-text: #c2c7df;
  --glow: 0 0 40px oklch(72% 0.20 210 / 0.22);
  --glow2: 0 0 40px oklch(63% 0.22 285 / 0.18);
  --cursor-color: #fff; --nav-blur: rgba(6,6,15,0.88);
  --radius: 12px; --radius-lg: 20px;
  --t: 0.35s; --ease: cubic-bezier(0.4,0,0.2,1);
}
[data-theme="light"] {
  --bg: #f6f6fb; --surface: #ffffff; --surface-2: #eeeef8;
  --accent: oklch(48% 0.22 250); --accent-2: oklch(50% 0.20 310);
  --text: #2a2c3e; --text-muted: #7a7d96;
  --border: rgba(50,60,120,0.12); --border-hover: rgba(50,60,120,0.28);
  --heading-color: #181a2e; --card-bg: #ffffff;
  --hero-grad: linear-gradient(135deg,#181a2e 0%,oklch(40% 0.22 250) 50%,oklch(45% 0.20 310) 100%);
  --chart-grid: rgba(50,60,120,0.12); --chart-text: #2a2c3e;
  --glow: 0 4px 24px rgba(50,60,180,0.12); --glow2: 0 4px 24px rgba(100,50,180,0.10);
  --cursor-color: #181a2e; --nav-blur: rgba(246,246,251,0.92);
}
[data-theme="batman"] {
  --bg: #000; --surface: #0e0e0e; --surface-2: #1a1a1a;
  --accent: #FFE919; --accent-2: #ff3333;
  --text: #e0e0e0; --text-muted: #888;
  --border: rgba(255,233,25,0.15); --border-hover: rgba(255,233,25,0.4);
  --heading-color: #FFE919; --card-bg: #0e0e0e;
  --hero-grad: linear-gradient(135deg,#fff7a0 0%,#FFE919 50%,#ffb300 100%);
  --chart-grid: rgba(255,233,25,0.15); --chart-text: #FFE919;
  --glow: 0 0 30px rgba(255,233,25,0.35); --glow2: 0 0 30px rgba(255,50,50,0.25);
  --cursor-color: #FFE919; --nav-blur: rgba(0,0,0,0.92);
}
[data-theme="cyberpunk"] {
  --bg: #06000e; --surface: #0f0020; --surface-2: #18003a;
  --accent: #ff0080; --accent-2: #00ffcc;
  --text: #e0c8f0; --text-muted: #8866aa;
  --border: rgba(255,0,128,0.15); --border-hover: rgba(255,0,128,0.38);
  --heading-color: #f0d0ff; --card-bg: #0f0020;
  --hero-grad: linear-gradient(135deg,#ff0080 0%,#cc00ff 50%,#00ffcc 100%);
  --chart-grid: rgba(255,0,128,0.15); --chart-text: #e0c8f0;
  --glow: 0 0 30px rgba(255,0,128,0.35); --glow2: 0 0 30px rgba(0,255,204,0.25);
  --cursor-color: #ff0080; --nav-blur: rgba(6,0,14,0.92);
}
[data-theme="ocean"] {
  --bg: #010d1a; --surface: #071a2e; --surface-2: #0c2440;
  --accent: #00e5b0; --accent-2: #0099ff;
  --text: #b0d0e8; --text-muted: #4a6a80;
  --border: rgba(0,229,176,0.12); --border-hover: rgba(0,229,176,0.32);
  --heading-color: #d8f0f8; --card-bg: #071a2e;
  --hero-grad: linear-gradient(135deg,#d8f0f8 0%,#00e5b0 40%,#0099ff 100%);
  --chart-grid: rgba(0,229,176,0.12); --chart-text: #b0d0e8;
  --glow: 0 0 30px rgba(0,229,176,0.28); --glow2: 0 0 30px rgba(0,153,255,0.22);
  --cursor-color: #00e5b0; --nav-blur: rgba(1,13,26,0.92);
}

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; overflow-x: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

/* === BATMAN FONT OVERRIDE === */
[data-theme="batman"] h1,[data-theme="batman"] h2,[data-theme="batman"] h3 {
  font-family: 'Bangers', cursive !important; letter-spacing: 2px; text-transform: uppercase;
}
[data-theme="batman"] .section-header h2 { font-size: clamp(2.5rem,5vw,5rem) !important; }
[data-theme="batman"] .hero-name { font-size: clamp(4rem,11vw,11rem) !important; }

/* === CYBERPUNK GLITCH === */
[data-theme="cyberpunk"] .hero-name {
  text-shadow: 0 0 20px rgba(255,0,128,0.5), 0 0 60px rgba(204,0,255,0.2);
}
[data-theme="cyberpunk"] .section-header h2 {
  text-shadow: 0 0 15px rgba(255,0,128,0.3);
}
[data-theme="cyberpunk"] .nav-logo { text-shadow: 0 0 12px rgba(255,0,128,0.6); }

/* === PROGRESS BAR (CSS scroll-driven) === */
#progress-bar {
  position: fixed; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(to right, var(--accent), var(--accent-2));
  transform-origin: left; z-index: 500;
  animation: progress auto linear;
  animation-timeline: scroll(root block);
}
@keyframes progress { from { transform: scaleX(0); } to { transform: scaleX(1); } }

/* === CUSTOM CURSOR === */
#cursor-dot, #cursor-ring {
  position: fixed; border-radius: 50%;
  pointer-events: none; z-index: 9999;
  transform: translate(-50%, -50%);
}
#cursor-dot {
  width: 7px; height: 7px;
  background: var(--cursor-color);
  transition: width 0.15s, height 0.15s, opacity 0.15s;
}
#cursor-ring {
  width: 36px; height: 36px;
  border: 1.5px solid var(--cursor-color);
  opacity: 0.6;
  transition: width 0.3s var(--ease), height 0.3s var(--ease), opacity 0.3s, border-color 0.3s;
}
body.c-hover #cursor-dot { width: 4px; height: 4px; opacity: 0.7; }
body.c-hover #cursor-ring { width: 54px; height: 54px; opacity: 0.4; }
body.c-click #cursor-ring { width: 24px; height: 24px; opacity: 1; }
@media (hover: none) { #cursor-dot, #cursor-ring { display: none; } }

/* === LAYOUT === */
.container { max-width: 1200px; margin: 0 auto; padding: 0 clamp(20px,5vw,64px); }
.section { padding: clamp(80px,12vw,140px) 0; position: relative; }
.section-alt { background: var(--surface); }

/* === SECTION HEADERS === */
.section-header { margin-bottom: clamp(40px,6vw,72px); }
.section-label {
  font-family: 'Fira Code', monospace; font-size: 0.75rem;
  color: var(--accent); letter-spacing: 0.2em;
  text-transform: uppercase; display: block; margin-bottom: 14px;
}
.section-header h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem,4.5vw,3.8rem); font-weight: 700;
  line-height: 1.1; color: var(--heading-color);
}
/* Word-reveal spans */
.word {
  display: inline-block;
  opacity: 0; transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  transition-delay: var(--wd, 0ms);
}
.word.vis { opacity: 1; transform: none; }

/* === NAV === */
#nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  transition: background var(--t), border-color var(--t);
  border-bottom: 1px solid transparent;
}
#nav.scrolled { background: var(--nav-blur); backdrop-filter: blur(24px); border-color: var(--border); }
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 20px clamp(20px,5vw,64px);
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.nav-logo {
  font-family: 'Space Grotesk', sans-serif; font-size: 1.4rem; font-weight: 700;
  color: var(--heading-color); text-decoration: none; letter-spacing: -0.02em; flex-shrink: 0;
}
.nav-logo .dot { color: var(--accent); }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a {
  font-family: 'Fira Code', monospace; font-size: 0.76rem;
  color: var(--text-muted); text-decoration: none; letter-spacing: 0.04em;
  transition: color 0.2s; position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 1px; background: var(--accent);
  transform: scaleX(0); transition: transform 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--accent); }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }
/* Theme selector */
.theme-wrap { position: relative; }
.theme-icon-btn {
  background: none; border: 1px solid var(--border); border-radius: 8px;
  padding: 6px 10px; color: var(--text-muted); display: flex; align-items: center;
  gap: 6px; font-size: 0.72rem; font-family: 'Fira Code', monospace;
  transition: border-color 0.2s, color 0.2s;
}
.theme-icon-btn:hover { border-color: var(--accent); color: var(--accent); }
.theme-icon-btn svg { width: 14px; height: 14px; }
.theme-popover {
  position: absolute; top: calc(100% + 10px); right: 0;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 8px;
  display: flex; flex-direction: column; gap: 4px; min-width: 130px;
  opacity: 0; visibility: hidden; pointer-events: none;
  transform: translateY(-10px) scale(0.96);
  transition: opacity 0.22s, transform 0.22s, visibility 0.22s;
  box-shadow: 0 12px 40px rgba(0,0,0,0.35); z-index: 300;
}
.theme-popover.open { opacity: 1; visibility: visible; pointer-events: auto; transform: none; }
.theme-opt {
  background: none; border: none; border-radius: 7px; padding: 8px 14px;
  color: var(--text-muted); font-size: 0.8rem; text-align: left;
  display: flex; align-items: center; gap: 8px;
  transition: background 0.15s, color 0.15s;
}
.theme-opt:hover { background: var(--surface-2); color: var(--text); }
.theme-opt.active { color: var(--accent); }
.theme-swatch {
  width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0;
  border: 1px solid rgba(255,255,255,0.2);
}
.menu-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; padding: 4px;
}
.menu-toggle span { width: 22px; height: 2px; background: var(--text); display: block; transition: var(--t) var(--ease); }
.menu-open .menu-toggle span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.menu-open .menu-toggle span:nth-child(2) { opacity: 0; }
.menu-open .menu-toggle span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* === HERO === */
#hero-canvas { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; transition: opacity 0.6s; }
#hero { position: relative; min-height: 100vh; display: flex; align-items: center; z-index: 1; }
.hero-content {
  max-width: 1200px; margin: 0 auto;
  padding: 120px clamp(20px,5vw,64px) 80px;
  /* Entrance handled by JS adding .entered class */
}
.hero-eyebrow { font-family: 'Fira Code', monospace; font-size: 0.9rem; color: var(--text-muted); margin-bottom: 16px; }
.hero-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(3.8rem,10vw,9.5rem); font-weight: 700; line-height: 0.92;
  background: var(--hero-grad);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  margin-bottom: 28px; letter-spacing: -0.03em;
}
.hero-role {
  font-family: 'Fira Code', monospace;
  font-size: clamp(1rem,2.2vw,1.4rem); color: var(--accent);
  margin-bottom: 22px; min-height: 2.2em; display: flex; align-items: center; gap: 4px;
}
.cursor-blink { animation: blink 1s step-end infinite; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }
.hero-tagline { font-size: clamp(1rem,1.8vw,1.18rem); color: var(--text-muted); max-width: 480px; margin-bottom: 44px; line-height: 1.65; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  padding: 14px 34px; background: var(--accent); color: var(--bg);
  font-family: 'Space Grotesk', sans-serif; font-weight: 600; font-size: 0.92rem;
  border-radius: 50px; text-decoration: none; display: inline-block;
  transition: box-shadow var(--t), transform var(--t);
  will-change: transform;
}
.btn-primary:hover { box-shadow: var(--glow); }
.btn-ghost {
  padding: 14px 34px; border: 1px solid var(--border-hover); color: var(--text);
  font-family: 'Space Grotesk', sans-serif; font-weight: 500; font-size: 0.92rem;
  border-radius: 50px; text-decoration: none; display: inline-block;
  transition: border-color var(--t), color var(--t), transform var(--t);
  will-change: transform;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.hero-scroll { position: absolute; bottom: 44px; left: clamp(20px,5vw,64px); display: flex; flex-direction: column; align-items: center; gap: 10px; }
.hero-scroll span { font-family: 'Fira Code', monospace; font-size: 0.65rem; color: var(--text-muted); letter-spacing: 0.18em; text-transform: uppercase; writing-mode: vertical-lr; }
.scroll-line { width: 1px; height: 56px; background: linear-gradient(to bottom, var(--accent), transparent); animation: scroll-pulse 2s ease-in-out infinite; }
@keyframes scroll-pulse { 0%,100%{opacity:.3;transform:scaleY(1)} 50%{opacity:1;transform:scaleY(1.1)} }

/* === ABOUT === */
.about-grid { display: grid; grid-template-columns: 340px 1fr; gap: clamp(40px,7vw,100px); align-items: start; }
.about-image { position: relative; }
.about-image img { width: 100%; aspect-ratio: 3/4; object-fit: cover; object-position: top; border-radius: var(--radius-lg); filter: grayscale(25%) brightness(0.9); transition: filter 0.5s; }
.about-image:hover img { filter: grayscale(0%) brightness(1); }
.img-frame { position: absolute; inset: -10px; border: 1px solid var(--accent); border-radius: calc(var(--radius-lg) + 6px); opacity: 0.25; z-index: -1; transition: opacity 0.4s; }
.about-image:hover .img-frame { opacity: 0.65; }
.about-intro { font-size: 1.08rem; color: var(--heading-color); line-height: 1.75; margin-bottom: 16px; }
.about-body p { color: var(--text-muted); margin-bottom: 32px; line-height: 1.7; }
.about-stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; margin-top: 36px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 12px; text-align: center; transition: border-color var(--t), box-shadow var(--t), transform var(--t); will-change: transform; }
.stat:hover { border-color: var(--accent); box-shadow: var(--glow); }
.stat-row { display: flex; align-items: baseline; justify-content: center; gap: 2px; }
.stat-num { font-family: 'Space Grotesk', sans-serif; font-size: 2rem; font-weight: 700; color: var(--accent); }
.stat-suffix { font-size: 1.3rem; font-weight: 700; color: var(--accent); }
.stat-label { display: block; margin-top: 4px; font-size: 0.68rem; font-family: 'Fira Code', monospace; color: var(--text-muted); letter-spacing: 0.06em; text-transform: uppercase; }

/* === TIMELINE === */
.timeline { position: relative; padding-left: 28px; }
.timeline::before { content: ''; position: absolute; left: 0; top: 12px; bottom: 0; width: 1px; background: linear-gradient(to bottom, var(--accent), var(--accent-2), transparent 95%); }
.tl-entry { position: relative; margin-bottom: 44px; }
.tl-entry::before { content: ''; position: absolute; left: -34px; top: 12px; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 14px var(--accent); border: 2px solid var(--bg); transition: box-shadow 0.3s; }
.tl-entry:hover::before { box-shadow: 0 0 24px var(--accent); }
.tl-head { display: flex; align-items: center; gap: 16px; margin-bottom: 10px; cursor: pointer; }
.tl-logo { width: 42px; height: 42px; object-fit: contain; background: #fff; border-radius: 8px; padding: 4px; flex-shrink: 0; }
.tl-meta h3 { font-family: 'Space Grotesk', sans-serif; font-size: 1.05rem; font-weight: 600; color: var(--heading-color); }
.tl-meta .role { font-family: 'Fira Code', monospace; font-size: 0.78rem; color: var(--accent); display: block; }
.tl-meta .date { font-size: 0.75rem; color: var(--text-muted); }
.tl-toggle { margin-left: auto; font-family: 'Fira Code', monospace; font-size: 0.72rem; color: var(--accent); background: none; border: 1px solid var(--border); border-radius: 20px; padding: 4px 14px; transition: all 0.2s; flex-shrink: 0; will-change: transform; }
.tl-toggle:hover { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.tl-projects { display: grid; gap: 10px; max-height: 0; overflow: hidden; opacity: 0; transition: max-height 0.55s var(--ease), opacity 0.35s; }
.tl-projects.open { max-height: 3000px; opacity: 1; }
.proj-card { background: var(--surface-2); border: 1px solid var(--border); border-left: 2px solid var(--accent-2); border-radius: var(--radius); padding: 14px 18px; transition: transform var(--t), border-color var(--t); will-change: transform; }
.proj-card:hover { transform: translateX(5px); border-color: var(--border-hover); border-left-color: var(--accent); }
.proj-card h4 { font-size: 0.88rem; font-weight: 600; color: var(--heading-color); margin-bottom: 5px; }
.proj-card p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.6; }

/* === EDUCATION === */
.edu-card { display: flex; align-items: flex-start; gap: 32px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px; transition: border-color var(--t), box-shadow var(--t), transform var(--t); will-change: transform; }
.edu-card:hover { border-color: var(--border-hover); box-shadow: var(--glow); }
.edu-logo { width: 90px; height: 90px; object-fit: contain; background: #fff; border-radius: 12px; padding: 8px; flex-shrink: 0; }
.edu-body h3 { font-family: 'Space Grotesk', sans-serif; font-size: 1.25rem; font-weight: 600; margin-bottom: 4px; color: var(--heading-color); }
.edu-date { font-family: 'Fira Code', monospace; font-size: 0.78rem; color: var(--accent); display: block; margin-bottom: 10px; }
.edu-degree { color: var(--text); margin-bottom: 14px; font-weight: 500; }
.edu-body li { font-size: 0.88rem; color: var(--text-muted); padding: 3px 0 3px 16px; position: relative; }
.edu-body li::before { content: '→'; position: absolute; left: 0; color: var(--accent); }
.sub-heading { font-family: 'Fira Code', monospace; font-size: 0.82rem; color: var(--text-muted); letter-spacing: 0.1em; text-transform: uppercase; margin: 52px 0 22px; }
.intern-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin-bottom: 14px; transition: border-color var(--t), transform var(--t); will-change: transform; }
.intern-card:hover { border-color: var(--border-hover); transform: translateX(4px); }
.intern-card h3 { font-family: 'Space Grotesk', sans-serif; font-size: 1rem; margin-bottom: 3px; color: var(--heading-color); }
.intern-card .date { font-family: 'Fira Code', monospace; font-size: 0.76rem; color: var(--accent); display: block; margin-bottom: 10px; }
.intern-card p { font-size: 0.84rem; color: var(--text-muted); line-height: 1.65; }

/* === PUBLICATIONS === */
.pub-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(300px,1fr)); gap: 18px; }
.pub-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; display: flex; flex-direction: column; transition: border-color var(--t), box-shadow var(--t); will-change: transform; }
.pub-card:hover { border-color: var(--border-hover); box-shadow: 0 24px 48px rgba(0,0,0,0.3); }
.pub-tag { font-family: 'Fira Code', monospace; font-size: 0.68rem; padding: 3px 11px; border-radius: 20px; display: inline-block; width: fit-content; margin-bottom: 14px; text-transform: uppercase; letter-spacing: 0.1em; }
.pub-tag.patent { background: oklch(63% 0.22 285 / 0.14); color: oklch(80% 0.14 285); border: 1px solid oklch(63% 0.22 285 / 0.3); }
.pub-tag.paper { background: oklch(72% 0.20 210 / 0.14); color: oklch(82% 0.12 210); border: 1px solid oklch(72% 0.20 210 / 0.3); }
[data-theme="batman"] .pub-tag.patent { background: rgba(255,50,50,0.15); color: #ff6666; border-color: rgba(255,50,50,0.3); }
[data-theme="batman"] .pub-tag.paper { background: rgba(255,233,25,0.15); color: #FFE919; border-color: rgba(255,233,25,0.3); }
[data-theme="cyberpunk"] .pub-tag.patent { background: rgba(0,255,204,0.12); color: #00ffcc; border-color: rgba(0,255,204,0.3); }
[data-theme="cyberpunk"] .pub-tag.paper { background: rgba(255,0,128,0.12); color: #ff0080; border-color: rgba(255,0,128,0.3); }
.pub-card h3 { font-size: 0.9rem; font-weight: 600; color: var(--heading-color); margin-bottom: 8px; flex: 1; line-height: 1.45; }
.pub-venue { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 16px; }
.pub-link { font-family: 'Fira Code', monospace; font-size: 0.78rem; color: var(--accent); text-decoration: none; display: inline-flex; align-items: center; gap: 6px; transition: gap 0.2s, color 0.2s; }
.pub-link:hover { gap: 10px; color: var(--heading-color); }

/* === CERTIFICATIONS === */
.cert-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(280px,1fr)); gap: 14px; margin-bottom: 48px; }
.cert-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; display: flex; align-items: center; gap: 14px; transition: border-color var(--t), transform var(--t); will-change: transform; }
.cert-card:hover { border-color: var(--border-hover); transform: translateX(4px); }
.cert-tag { font-family: 'Fira Code', monospace; font-size: 0.65rem; font-weight: 600; padding: 4px 9px; border-radius: 6px; flex-shrink: 0; text-transform: uppercase; letter-spacing: 0.04em; }
.cert-tag.aws { background: #FF9900; color: #000; }
.cert-tag.microsoft { background: #00a4ef; color: #000; }
.cert-tag.google { background: #4285f4; color: #fff; }
.cert-tag.ibm { background: #054ada; color: #fff; }
.cert-tag.coursera { background: #0056d2; color: #fff; }
.cert-card h3 { font-size: 0.84rem; font-weight: 500; color: var(--text); flex: 1; line-height: 1.4; }
.cert-card a { font-family: 'Fira Code', monospace; font-size: 0.72rem; color: var(--accent); text-decoration: none; flex-shrink: 0; opacity: 0.7; transition: opacity 0.2s; }
.cert-card a:hover { opacity: 1; }

/* === BADGE CAROUSEL === */
.carousel-outer { position: relative; padding: 0 32px; }
.carousel-track {
  display: flex; gap: 14px;
  overflow-x: auto; scroll-behavior: smooth;
  scrollbar-width: none; -ms-overflow-style: none;
  cursor: grab; padding: 8px 0 16px; user-select: none;
}
.carousel-track::-webkit-scrollbar { display: none; }
.carousel-track.dragging { cursor: grabbing; scroll-behavior: auto; }
.carousel-btn {
  position: absolute; top: 50%; transform: translateY(-60%);
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s; z-index: 10; will-change: transform;
}
.carousel-btn:hover { 
  background: var(--accent); 
  color: var(--bg); 
  border-color: var(--accent); 
  box-shadow: var(--glow); 
}
.carousel-btn.prev { left: -4px; }
.carousel-btn.next { right: -4px; }
.carousel-badge {
  flex-shrink: 0; width: 120px;
  display: flex; flex-direction: column; align-items: center;
  gap: 8px; text-align: center;
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 10px;
  text-decoration: none; color: var(--text-muted);
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
  will-change: transform;
}
.carousel-badge:hover { 
  border-color: var(--accent); 
  background: var(--surface-2);
  box-shadow: var(--glow); 
}
.carousel-badge img { width: 56px; height: 56px; object-fit: contain; pointer-events: none; }
.carousel-badge span { font-size: 0.62rem; line-height: 1.3; pointer-events: none; }

/* === SKILLS === */
.skills-layout { display: grid; grid-template-columns: 360px 1fr; gap: 48px; align-items: start; }
.chart-wrap {
  position: sticky; top: 110px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  transition: border-color var(--t), box-shadow var(--t);
}
.chart-wrap:hover { border-color: var(--border-hover); box-shadow: var(--glow); }
.chart-wrap h3 { font-family: 'Fira Code', monospace; font-size: 0.75rem; color: var(--accent); text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 20px; }
#skills-chart { width: 100% !important; height: 300px !important; }
.skills-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(250px,1fr)); gap: 16px; }
.skill-cat { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; transition: border-color var(--t), box-shadow var(--t); will-change: transform; }
.skill-cat:hover { border-color: var(--border-hover); }
.skill-cat h3 { font-family: 'Fira Code', monospace; font-size: 0.73rem; color: var(--accent); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--border); }
.skill-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.skill-tag { font-size: 0.76rem; padding: 4px 12px; border-radius: 20px; background: var(--surface); border: 1px solid var(--border); color: var(--text); transition: border-color 0.2s, color 0.2s; }
.skill-cat:hover .skill-tag { border-color: var(--border-hover); }

/* === CONTACT === */
.contact-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: clamp(40px,6vw,72px); text-align: center; max-width: 720px; margin: 0 auto; position: relative; overflow: hidden; }
.contact-card::before { content: ''; position: absolute; top: -40%; left: -40%; width: 180%; height: 180%; background: radial-gradient(circle, oklch(63% 0.22 285 / 0.07) 0%, transparent 65%); pointer-events: none; }
[data-theme="batman"] .contact-card::before { background: radial-gradient(circle, rgba(255,233,25,0.06) 0%, transparent 65%); }
[data-theme="cyberpunk"] .contact-card::before { background: radial-gradient(circle, rgba(255,0,128,0.07) 0%, transparent 65%); }
.contact-card p { font-size: 1.05rem; color: var(--text-muted); margin-bottom: 40px; line-height: 1.75; }
.social-links { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.social-btn { display: flex; align-items: center; gap: 8px; padding: 12px 26px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 50px; color: var(--text); text-decoration: none; font-size: 0.88rem; transition: border-color var(--t), color var(--t), box-shadow var(--t); will-change: transform; }
.social-btn svg { width: 17px; height: 17px; flex-shrink: 0; }
.social-btn:hover { border-color: var(--accent); color: var(--accent); box-shadow: var(--glow); }

/* === FOOTER === */
footer { background: var(--bg); border-top: 1px solid var(--border); padding: 30px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; }
footer p { font-size: 0.82rem; color: var(--text-muted); }
footer strong { color: var(--text); }
.back-top { font-family: 'Fira Code', monospace; font-size: 0.78rem; color: var(--accent); text-decoration: none; transition: color 0.2s; }
.back-top:hover { color: var(--heading-color); }

/* === SCROLL-DRIVEN ANIMATIONS === */
/* === SCROLL REVEAL — JS-driven, always reliable === */
/* Hero: always visible, entrance via transform-only animation */
.hero-content {
  opacity: 1;
  animation: heroSlide 0.9s cubic-bezier(0.4,0,0.2,1) both;
}
@keyframes heroSlide {
  from { transform: translateY(36px); }
  to   { transform: none; }
}

/* Generic reveal classes used by IntersectionObserver */
.reveal          { opacity: 0; transform: translateY(36px);    transition: opacity 0.75s var(--ease), transform 0.75s var(--ease); }
.reveal.from-left  { transform: translateX(-36px) translateY(0); }
.reveal.from-right { transform: translateX(36px) translateY(0); }
.reveal.scale-in   { transform: scale(0.9) translateY(16px); }
.reveal.flip-in    { transform: perspective(600px) rotateX(14deg) translateY(24px); }
.reveal.visible    { opacity: 1; transform: none; }

/* Stagger delays */
.d1{transition-delay:.1s}.d2{transition-delay:.2s}.d3{transition-delay:.3s}

/* CSS scroll-driven: progress bar only (well-supported, no fill-mode conflict) */
/* (already declared above under #progress-bar) */

/* === MOBILE NAV === */
@media (max-width: 860px) {
  .menu-toggle { display: flex; }
  .nav-links {
    position: fixed; inset: 0;
    background: var(--nav-blur); backdrop-filter: blur(20px);
    flex-direction: column; align-items: center; justify-content: center;
    gap: 32px; z-index: 198;
    clip-path: circle(0% at calc(100% - 60px) 30px);
    transition: clip-path 0.5s var(--ease);
    pointer-events: none;
  }
  .nav-links.open { clip-path: circle(160% at calc(100% - 60px) 30px); pointer-events: all; }
  .nav-links a { font-size: 1.3rem; }
  .menu-toggle { z-index: 199; position: relative; }
}
@media (max-width: 960px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-image { max-width: 280px; margin: 0 auto; }
  .about-stats { grid-template-columns: repeat(2,1fr); }
  .edu-card { flex-direction: column; gap: 20px; padding: 28px; }
  .skills-layout { grid-template-columns: 1fr; }
  .chart-wrap { position: static; }
  .footer-inner { flex-direction: column; gap: 14px; text-align: center; }
}
@media (max-width: 580px) {
  .hero-name { font-size: 3.2rem; }
  .hero-cta { flex-direction: column; }
  .pub-grid, .cert-grid { grid-template-columns: 1fr; }
  .social-links { flex-direction: column; align-items: stretch; }
  .social-btn { justify-content: center; }
  .carousel-outer { padding: 0 16px; }
}