/* ============================================
   VARIABLES
   ============================================ */
:root {
  --bg: #0b0d12;
  --bg-elevated: #111520;
  --bg-card: #141824;
  --bg-card-hover: #19202e;
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.13);
  --text-h: #f1f2f5;
  --text-body: #c4c7d0;
  --text-sec: #8e91a0;
  --text-muted: #585c6a;
  --accent: #5b9cf6;
  --accent-dim: rgba(91, 156, 246, 0.08);
  --accent-glow: rgba(91, 156, 246, 0.04);
  --grad-a: #5b9cf6;
  --grad-b: #8b7cf6;
  --f-head: 'Sora', sans-serif;
  --f-body: 'DM Sans', sans-serif;
  --f-mono: 'JetBrains Mono', monospace;
  --max-w: 1180px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ============================================
   RESET
   ============================================ */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--f-body);
  background: var(--bg);
  color: var(--text-body);
  line-height: 1.7;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-align: justify;
  overflow-x: hidden;
  animation: pageFade 0.6s ease;
}
@keyframes pageFade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: all 0.3s var(--ease);
}
a:hover {
  color: var(--text-h);
}
::selection {
  background: var(--accent-dim);
  color: var(--accent);
}
img {
  max-width: 100%;
  display: block;
}

/* ============================================
   SCROLL PROGRESS BAR
   ============================================ */
.scroll-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  z-index: 300;
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b));
  width: 0%;
  pointer-events: none;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}
section {
  padding: 80px 0;
  position: relative;
}
.divider {
  height: 1px;
  max-width: var(--max-w);
  margin: 0 auto;
  background: linear-gradient(90deg, transparent, var(--border-hover) 50%, transparent);
}

/* ============================================
   REVEAL ANIMATIONS
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.8s var(--ease),
    transform 0.8s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition:
    opacity 0.8s var(--ease),
    transform 0.8s var(--ease);
}
.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.stagger > .reveal:nth-child(1) {
  transition-delay: 0s;
}
.stagger > .reveal:nth-child(2) {
  transition-delay: 0.07s;
}
.stagger > .reveal:nth-child(3) {
  transition-delay: 0.14s;
}
.stagger > .reveal:nth-child(4) {
  transition-delay: 0.21s;
}
.stagger > .reveal:nth-child(5) {
  transition-delay: 0.28s;
}
.stagger > .reveal:nth-child(6) {
  transition-delay: 0.35s;
}

/* Hero staggered lines */
.hero-line {
  opacity: 0;
  transform: translateY(40px);
  animation: lineUp 1s var(--ease) forwards;
}
.hero-line:nth-child(1) {
  animation-delay: 0.1s;
}
.hero-line:nth-child(2) {
  animation-delay: 0.2s;
}
.hero-line:nth-child(3) {
  animation-delay: 0.35s;
}
.hero-line:nth-child(4) {
  animation-delay: 0.5s;
}
.hero-line:nth-child(5) {
  animation-delay: 0.65s;
}
@keyframes lineUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   NAV
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: rgba(11, 13, 18, 0.6);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--border);
  transition: background 0.4s var(--ease);
}
.nav.scrolled {
  background: rgba(11, 13, 18, 0.95);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-family: var(--f-head);
  font-weight: 700;
  font-size: 18px;
  color: var(--text-h);
  letter-spacing: -0.3px;
}
.nav-logo:hover {
  color: var(--accent);
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 32px;
}
.nav-links a {
  font-size: 15px;
  color: var(--text-sec);
  font-weight: 500;
  position: relative;
  padding-bottom: 3px;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b));
  border-radius: 1px;
  transition: width 0.3s var(--ease);
}
.nav-links a:hover {
  color: var(--text-h);
}
.nav-links a:hover::after {
  width: 100%;
}
.nav-links a.active {
  color: var(--text-h);
}
.nav-links a.active::after {
  width: 100%;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  padding: 150px 0 80px;
  position: relative;
  overflow: hidden;
}

/* Animated mesh bg */
.hero-mesh {
  position: absolute;
  top: -100px;
  left: -100px;
  right: -100px;
  bottom: -100px;
  background:
    radial-gradient(circle at 20% 50%, rgba(91, 156, 246, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(139, 124, 246, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(91, 156, 246, 0.04) 0%, transparent 50%);
  animation: meshFloat 12s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes meshFloat {
  0% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(-20px, 15px) scale(1.02);
  }
  100% {
    transform: translate(10px, -10px) scale(1.01);
  }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 52px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-family: var(--f-head);
  font-size: clamp(28px, 3.8vw, 42px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -1.2px;
  color: var(--text-h);
  margin-bottom: 24px;
}
.hero h2{
  font-family:var(--f-head);
  font-size:clamp(24px,3.2vw,36px);
  font-weight:700;line-height:1.25;letter-spacing:-1px;
  color:var(--text-h);margin-bottom:24px;
}
.hero h1 em {
  font-style: normal;
  color: var(--text-h);
}

.hero-sub {
  font-size: 18px;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 32px;
}
.hero-sub p {
  margin-bottom: 6px;
}
.hero-sub p:last-child {
  margin-bottom: 0;
}
.hero-sub strong {
  color: var(--text-h);
  font-weight: 600;
}

/* Photo */
.hero-photo {
  width: 300px;
  height: 300px;
  border-radius: 22px;
  overflow: hidden;
  border: 2px solid var(--border-hover);
  flex-shrink: 0;
  animation: photoFloat 4s ease-in-out infinite alternate;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
@keyframes photoFloat {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(-18px);
  }
}
.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover; transform: scale(1.25);
}
.photo-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #1a1f2e, #222840);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  color: var(--text-muted);
  font-size: 13px;
  font-family: var(--f-mono);
}
.photo-placeholder span {
  font-size: 40px;
}

/* Buttons */
.hero-btns {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text-sec);
  background: var(--bg-elevated);
  transition: all 0.35s var(--ease);
  font-family: var(--f-body);
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-dim), transparent);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
}
.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn:hover::before {
  opacity: 1;
}
.btn-primary {
  background: var(--accent);
  color: #0b0d12;
  border-color: var(--accent);
  box-shadow: 0 0 0 0 rgba(91, 156, 246, 0);
}
.btn-primary::before {
  display: none;
}
.btn-primary:hover {
  background: var(--text-h);
  border-color: var(--text-h);
  color: #0b0d12;
  box-shadow: 0 0 30px rgba(91, 156, 246, 0.25);
  transform: translateY(-2px);
}

/* ============================================
   SECTION HEADERS
   ============================================ */
.sec-header {
  margin-bottom: 44px;
}
.sec-label {
  font-size: 12px;
  font-family: var(--f-mono);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2.5px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.sec-label::before {
  content: '';
  width: 24px;
  height: 1.5px;
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b));
  border-radius: 1px;
}
.sec-title {
  font-family: var(--f-head);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-h);
  line-height: 1.3;
}

/* ============================================
   EXPERIENCE — Timeline Cards
   ============================================ */
.exp-timeline {
  position: relative;
  padding-left: 28px;
}
.exp-timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--grad-a), var(--grad-b), transparent);
  border-radius: 1px;
}
.exp-card {
  padding: 28px 30px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 18px;
  transition: all 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}
/* Spotlight glow that follows mouse */
.exp-card .spotlight {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(91, 156, 246, 0.07) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s;
  transform: translate(-50%, -50%);
}
.exp-card:hover .spotlight {
  opacity: 1;
}
.exp-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}
.exp-card:last-child {
  margin-bottom: 0;
}

/* Timeline dot */
.exp-card::before {
  content: '';
  position: absolute;
  left: -34px;
  top: 34px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  transition: all 0.3s var(--ease);
  z-index: 2;
}
.exp-card:hover::before {
  background: var(--accent);
  box-shadow: 0 0 12px rgba(91, 156, 246, 0.4);
}

.exp-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 6px;
  gap: 16px;
}
.exp-role {
  font-family: var(--f-head);
  font-size: 20px;
  font-weight: 600;
  color: var(--text-h);
}
.exp-date {
  font-size: 13px;
  font-family: var(--f-mono);
  color: var(--text-muted);
  white-space: nowrap;
}
.exp-company {
  font-size: 16px;
  color: var(--text-sec);
  margin-bottom: 16px;
}
.exp-bullets {
  list-style: none;
  padding: 0;
}
.exp-bullets li {
  font-size: 16px;
  color: var(--text-body);
  line-height: 1.75;
  padding-left: 20px;
  position: relative;
  margin-bottom: 8px;
}
.exp-bullets li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 14px;
}
.exp-bullets li:last-child {
  margin-bottom: 0;
}

/* ============================================
   PROJECTS
   ============================================ */
.proj-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.proj-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: all 0.4s var(--ease);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
}
.proj-card .spotlight {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(91, 156, 246, 0.07) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s;
  transform: translate(-50%, -50%);
}
.proj-card:hover .spotlight {
  opacity: 1;
}
.proj-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}
.proj-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 14px;
}
.proj-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: transform 0.4s var(--ease-spring);
}
.proj-card:hover .proj-icon {
  transform: scale(1.1) rotate(-4deg);
}
.proj-ghlink {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  font-family: var(--f-body);
  transition: color 0.3s var(--ease);
}
.proj-ghlink:hover {
  color: var(--accent);
}
.proj-ghlink svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.proj-title {
  font-family: var(--f-head);
  font-size: 19px;
  font-weight: 600;
  color: var(--text-h);
  margin-bottom: 10px;
}
.proj-desc {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.75;
  margin-bottom: 18px;
  flex-grow: 1;
}
.proj-tags {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
}
.tag {
  font-size: 12px;
  font-family: var(--f-mono);
  color: var(--text-sec);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  padding: 5px 12px;
  border-radius: 7px;
  transition: all 0.3s var(--ease);
}
.proj-card:hover .tag {
  border-color: var(--border-hover);
  color: var(--text-body);
}

/* Tag stagger animation */
.tag-anim .tag {
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 0.3s var(--ease),
    transform 0.3s var(--ease),
    border-color 0.3s var(--ease),
    color 0.3s var(--ease);
}
.tag-anim.animate .tag {
  opacity: 1;
  transform: translateY(0);
}
.tag-anim.animate .tag:nth-child(1) {
  transition-delay: 0s;
}
.tag-anim.animate .tag:nth-child(2) {
  transition-delay: 0.04s;
}
.tag-anim.animate .tag:nth-child(3) {
  transition-delay: 0.08s;
}
.tag-anim.animate .tag:nth-child(4) {
  transition-delay: 0.12s;
}
.tag-anim.animate .tag:nth-child(5) {
  transition-delay: 0.16s;
}
.tag-anim.animate .tag:nth-child(6) {
  transition-delay: 0.2s;
}

/* ============================================
   PUBLICATION
   ============================================ */
.pub-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: all 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}
.pub-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b));
  transform: scaleX(0);
  transition: transform 0.5s var(--ease);
}
.pub-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}
.pub-card:hover::after {
  transform: scaleX(1);
}
.pub-badge {
  display: inline-block;
  font-size: 12px;
  font-family: var(--f-mono);
  color: var(--accent);
  background: var(--accent-dim);
  padding: 5px 14px;
  border-radius: 16px;
  margin-bottom: 14px;
}
.pub-title {
  font-family: var(--f-head);
  font-size: 20px;
  font-weight: 600;
  color: var(--text-h);
  margin-bottom: 8px;
}
.pub-desc {
  font-size: 16px;
  color: var(--text-body);
  margin-bottom: 20px;
  line-height: 1.7;
}
.pub-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 16px;
}
.pub-val {
  font-family: var(--f-head);
  font-size: 28px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  line-height: 1.2;
}
.pub-lbl {
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--f-mono);
}

/* ============================================
   SKILLS
   ============================================ */
.skills-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.skill-card {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: all 0.4s var(--ease);
  position: relative;
  overflow: hidden;
}
.skill-card .spotlight {
  position: absolute;
  width: 250px;
  height: 250px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(91, 156, 246, 0.06) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s;
  transform: translate(-50%, -50%);
}
.skill-card:hover .spotlight {
  opacity: 1;
}
.skill-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}
.skill-card h3 {
  font-family: var(--f-head);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.skill-tag {
  font-size: 14px;
  font-family: var(--f-mono);
  color: var(--text-body);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 8px;
  transition: all 0.3s var(--ease);
}
.skill-card:hover .skill-tag {
  border-color: var(--border-hover);
}

/* ============================================
   EDUCATION
   ============================================ */
.edu-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 16px;
  transition: all 0.4s var(--ease);
}
.edu-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}
.edu-card:last-child {
  margin-bottom: 0;
}
.edu-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 4px;
  gap: 16px;
}
.edu-degree {
  font-family: var(--f-head);
  font-size: 20px;
  font-weight: 600;
  color: var(--text-h);
}
.edu-date {
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--f-mono);
  white-space: nowrap;
}
.edu-school {
  font-size: 16px;
  color: var(--text-sec);
  margin-bottom: 6px;
}
.edu-gpa {
  font-size: 14px;
  color: var(--accent);
  font-weight: 500;
  font-family: var(--f-mono);
  margin-bottom: 12px;
}
.edu-courses-label {
  font-size: 11px;
  font-family: var(--f-mono);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.edu-courses {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.edu-course {
  font-size: 12px;
  font-family: var(--f-mono);
  color: var(--text-sec);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 6px;
}

/* ============================================
   CONTACT
   ============================================ */
.contact-grid {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.contact-link {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 15px;
  font-weight: 500;
  padding: 14px 24px;
  border-radius: 12px;
  border: 1px solid var(--border);
  color: var(--text-body);
  background: var(--bg-card);
  transition: all 0.35s var(--ease);
  position: relative;
  overflow: hidden;
}
.contact-link::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-dim), transparent);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
}
.contact-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.contact-link:hover::before {
  opacity: 1;
}
.contact-link svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  position: relative;
  z-index: 1;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 40px 0;
  text-align: center;
}
.footer p {
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--f-mono);
}

/* Override justify for non-prose elements */
h1,
h2,
h3,
.sec-title,
.sec-label,
.exp-role,
.exp-company,
.exp-top,
.edu-degree,
.edu-school,
.edu-gpa,
.edu-courses-label,
.proj-title,
.pub-title,
.pub-badge,
.pub-stats,
.blog-date,
.blog-title,
.hero-btns,
.hero-sub strong,
.nav-inner,
.contact-grid,
.proj-top,
.proj-tags,
.skill-tags,
.edu-courses,
.case-company,
.case-title,
.case-metrics,
.post-meta,
.post-back {
  text-align: left;
}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 150;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-sec);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: all 0.4s var(--ease);
  font-size: 18px;
  backdrop-filter: blur(10px);
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(91, 156, 246, 0.15);
}

/* ============================================
   BLOG
   ============================================ */
.blog-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 16px;
  transition: all 0.4s var(--ease);
  display: block;
  color: inherit;
  position: relative;
  overflow: hidden;
}
.blog-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--grad-a), var(--grad-b));
  transform: scaleY(0);
  transition: transform 0.4s var(--ease);
  transform-origin: top;
}
.blog-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateX(4px);
  color: inherit;
}
.blog-card:hover::before {
  transform: scaleY(1);
}
.blog-date {
  font-size: 12px;
  font-family: var(--f-mono);
  color: var(--text-muted);
  margin-bottom: 8px;
}
.blog-title {
  font-family: var(--f-head);
  font-size: 20px;
  font-weight: 600;
  color: var(--text-h);
  margin-bottom: 8px;
  transition: color 0.3s var(--ease);
}
.blog-card:hover .blog-title {
  color: var(--accent);
}
.blog-excerpt {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.7;
}

/* Blog post */
.post-header {
  padding: 140px 0 36px;
}
.post-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 28px;
  transition: all 0.3s var(--ease);
}
.post-back:hover {
  color: var(--accent);
  transform: translateX(-4px);
}
.post-title {
  font-family: var(--f-head);
  font-size: clamp(24px, 3.5vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.5px;
  color: var(--text-h);
  margin-bottom: 10px;
}
.post-meta {
  font-size: 13px;
  font-family: var(--f-mono);
  color: var(--text-muted);
}
.post-content {
  padding: 0 0 72px;
}
.post-content p {
  font-size: 17px;
  color: var(--text-body);
  line-height: 1.85;
  margin-bottom: 22px;
}
.post-content h2 {
  font-family: var(--f-head);
  font-size: 24px;
  font-weight: 700;
  color: var(--text-h);
  margin: 48px 0 18px;
  letter-spacing: -0.3px;
}
.post-content h3 {
  font-family: var(--f-head);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-h);
  margin: 36px 0 12px;
}
.post-content code {
  font-family: var(--f-mono);
  font-size: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 5px;
  color: var(--accent);
}
.post-content pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  overflow-x: auto;
  margin-bottom: 24px;
}
.post-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-body);
}

/* Case studies */
.case-card {
  padding: 34px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 22px;
  transition: all 0.4s var(--ease);
  overflow: hidden;
  position: relative;
}
.case-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}
.case-card:last-child {
  margin-bottom: 0;
}
.case-company {
  font-size: 12px;
  font-family: var(--f-mono);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
}
.case-title {
  font-family: var(--f-head);
  font-size: 24px;
  font-weight: 700;
  color: var(--text-h);
  margin-bottom: 22px;
  letter-spacing: -0.3px;
}
.case-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 24px;
}
.case-block {
  padding: 18px;
  background: rgba(255, 255, 255, 0.015);
  border-radius: 12px;
  border: 1px solid var(--border);
}
.case-block-label {
  font-size: 10px;
  font-family: var(--f-mono);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
}
.case-block p {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.7;
}
.case-metrics {
  display: flex;
  gap: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}
.metric-val {
  font-family: var(--f-head);
  font-size: 28px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  line-height: 1.2;
}
.metric-lbl {
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--f-mono);
}

.page-hero {
  padding: 140px 0 40px;
}
.page-hero h1 {
  font-family: var(--f-head);
  font-size: clamp(26px, 3.8vw, 38px);
  font-weight: 700;
  letter-spacing: -0.8px;
  line-height: 1.25;
  color: var(--text-h);
  margin-bottom: 10px;
}
.page-hero p {
  font-size: 17px;
  color: var(--text-body);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .container {
    padding: 0 18px;
  }
  .nav-inner {
    padding: 0 18px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hero-photo {
    width: 160px;
    height: 160px;
    order: -1;
  }
  .proj-grid,
  .skills-grid,
  .case-grid {
    grid-template-columns: 1fr;
  }
  .exp-top,
  .edu-top {
    flex-direction: column;
    gap: 4px;
  }
  .exp-timeline {
    padding-left: 0;
  }
  .exp-timeline::before {
    display: none;
  }
  .exp-card::before {
    display: none;
  }
  section {
    padding: 56px 0;
  }
  .hero {
    padding-top: 110px;
  }
  .contact-grid {
    flex-direction: column;
  }
}