/* ============================================
   Google Blog-Inspired Portfolio & Blog Theme
   with Apple Liquid Glass Effects
   Font: Google Sans / Inter
   Colors: Google Material palette
   Spacing: 8px grid system
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  font-family: 'Google Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: #5f6368;
  background: #f0f2f5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: #1a73e8;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #174ea6;
}

ul, ol {
  list-style: none;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  color: #202124;
  font-weight: 600;
  line-height: 1.3;
}

h1 { font-size: 3rem; letter-spacing: -0.5px; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p + p { margin-top: 16px; }

.text-subtle { color: #5f6368; }
.text-accent { color: #1a73e8; }

/* --- Glass Mixins (via classes) --- */
.glass,
.stat-card,
.work-card,
.portfolio-card,
.blog-card,
.blog-featured,
.about__image-wrapper {
  background: rgba(255, 255, 255, 0.55);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.04),
    0 2px 8px rgba(0, 0, 0, 0.04),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.7);
}

/* --- Container --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow {
  max-width: 800px;
}

/* --- Section --- */
.section {
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.section--gray {
  background: rgba(248, 249, 250, 0.5);
}

/* --- Geometric Patterns & Decorative Elements --- */

/* Dot grid pattern */
.pattern-dots {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
  background-image: radial-gradient(circle, #dadce0 1px, transparent 1px);
  background-size: 32px 32px;
}

[data-theme="dark"] .pattern-dots {
  opacity: 0.08;
  background-image: radial-gradient(circle, rgba(255,255,255,0.4) 1px, transparent 1px);
}

/* Cross-hatch grid */
.pattern-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.08;
  background-image:
    linear-gradient(rgba(26, 115, 232, 0.3) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 115, 232, 0.3) 1px, transparent 1px);
  background-size: 48px 48px;
}

[data-theme="dark"] .pattern-grid {
  opacity: 0.05;
  background-image:
    linear-gradient(rgba(10, 132, 255, 0.3) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 132, 255, 0.3) 1px, transparent 1px);
}

/* Diagonal lines */
.pattern-diagonal {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.05;
  background-image: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 12px,
    rgba(26, 115, 232, 0.4) 12px,
    rgba(26, 115, 232, 0.4) 13px
  );
}

[data-theme="dark"] .pattern-diagonal {
  opacity: 0.04;
  background-image: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 12px,
    rgba(10, 132, 255, 0.3) 12px,
    rgba(10, 132, 255, 0.3) 13px
  );
}

/* Hexagon pattern */
.pattern-hex {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='52' viewBox='0 0 60 52' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0l25.98 15v30L30 60 4.02 45V15z' fill='none' stroke='%231a73e8' stroke-width='1'/%3E%3C/svg%3E");
  background-size: 60px 52px;
}

[data-theme="dark"] .pattern-hex {
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='52' viewBox='0 0 60 52' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0l25.98 15v30L30 60 4.02 45V15z' fill='none' stroke='%238ab4f8' stroke-width='1'/%3E%3C/svg%3E");
}

/* Gradient mesh blobs */
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}

.blob--blue {
  background: rgba(26, 115, 232, 0.12);
  width: 400px;
  height: 400px;
}

.blob--teal {
  background: rgba(78, 205, 196, 0.1);
  width: 350px;
  height: 350px;
}

.blob--purple {
  background: rgba(167, 119, 227, 0.08);
  width: 300px;
  height: 300px;
}

.blob--pink {
  background: rgba(232, 67, 147, 0.06);
  width: 280px;
  height: 280px;
}

[data-theme="dark"] .blob--blue { background: rgba(10, 132, 255, 0.08); }
[data-theme="dark"] .blob--teal { background: rgba(78, 205, 196, 0.06); }
[data-theme="dark"] .blob--purple { background: rgba(167, 119, 227, 0.06); }
[data-theme="dark"] .blob--pink { background: rgba(232, 67, 147, 0.04); }

/* Animated floating blobs */
@keyframes blobFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -20px) scale(1.05); }
  50% { transform: translate(-10px, 20px) scale(0.95); }
  75% { transform: translate(20px, 10px) scale(1.02); }
}

@keyframes blobFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-25px, 15px) scale(1.03); }
  66% { transform: translate(15px, -25px) scale(0.97); }
}

@keyframes blobFloat3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(20px, 25px) scale(1.04); }
}

.blob--animate1 { animation: blobFloat1 20s ease-in-out infinite; }
.blob--animate2 { animation: blobFloat2 25s ease-in-out infinite; }
.blob--animate3 { animation: blobFloat3 18s ease-in-out infinite; }

/* Geometric floating shapes */
.geo-shape {
  position: absolute;
  pointer-events: none;
  z-index: 0;
  opacity: 0.06;
}

[data-theme="dark"] .geo-shape {
  opacity: 0.04;
}

.geo-shape--ring {
  width: 120px;
  height: 120px;
  border: 2px solid #1a73e8;
  border-radius: 50%;
}

.geo-shape--ring-lg {
  width: 200px;
  height: 200px;
  border: 1.5px solid #1a73e8;
  border-radius: 50%;
}

.geo-shape--square {
  width: 80px;
  height: 80px;
  border: 2px solid #1a73e8;
  border-radius: 8px;
  transform: rotate(45deg);
}

.geo-shape--triangle {
  width: 0;
  height: 0;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-bottom: 86px solid rgba(26, 115, 232, 0.08);
  background: none;
  border-radius: 0;
}

.geo-shape--diamond {
  width: 60px;
  height: 60px;
  background: rgba(26, 115, 232, 0.06);
  transform: rotate(45deg);
  border-radius: 4px;
}

.geo-shape--cross {
  width: 40px;
  height: 40px;
  position: absolute;
}

.geo-shape--cross::before,
.geo-shape--cross::after {
  content: '';
  position: absolute;
  background: #1a73e8;
  border-radius: 2px;
}

.geo-shape--cross::before {
  width: 100%;
  height: 2px;
  top: 50%;
  transform: translateY(-50%);
}

.geo-shape--cross::after {
  width: 2px;
  height: 100%;
  left: 50%;
  transform: translateX(-50%);
}

[data-theme="dark"] .geo-shape--ring,
[data-theme="dark"] .geo-shape--ring-lg,
[data-theme="dark"] .geo-shape--square {
  border-color: #0a84ff;
}

[data-theme="dark"] .geo-shape--triangle {
  border-bottom-color: rgba(10, 132, 255, 0.06);
}

[data-theme="dark"] .geo-shape--diamond {
  background: rgba(10, 132, 255, 0.05);
}

[data-theme="dark"] .geo-shape--cross::before,
[data-theme="dark"] .geo-shape--cross::after {
  background: #0a84ff;
}

/* Floating animation for shapes */
@keyframes geoFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-15px) rotate(5deg); }
}

@keyframes geoFloatAlt {
  0%, 100% { transform: translateY(0) rotate(45deg); }
  50% { transform: translateY(-12px) rotate(50deg); }
}

@keyframes geoSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.geo-float { animation: geoFloat 8s ease-in-out infinite; }
.geo-float-alt { animation: geoFloatAlt 10s ease-in-out infinite; }
.geo-spin { animation: geoSpin 30s linear infinite; }

/* Section-specific pattern placements */
.hero {
  position: relative;
  overflow: hidden;
}

.hero > .container {
  position: relative;
  z-index: 1;
}

/* Ensure content stays above decorations */
.section > .container {
  position: relative;
  z-index: 1;
}

.section__header {
  margin-bottom: 48px;
}

.section__label {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #1a73e8;
  margin-bottom: 12px;
}

.section__title {
  font-size: 2rem;
  color: #202124;
  margin-bottom: 16px;
}

.section__subtitle {
  font-size: 1.125rem;
  color: #5f6368;
  max-width: 600px;
}

/* --- Header / Nav (Liquid Glass) --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: rgba(255, 255, 255, 0.6);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  backdrop-filter: blur(24px) saturate(200%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.03),
    0 1px 4px rgba(0, 0, 0, 0.05),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.8);
  z-index: 1000;
  transition: all 0.3s ease;
}

.header--scrolled {
  background: rgba(255, 255, 255, 0.72);
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.04),
    0 2px 12px rgba(0, 0, 0, 0.08),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.9);
}

.header__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.header__logo-img {
  height: 28px;
  width: auto;
  transition: opacity 0.2s ease, filter 0.3s ease;
}

.header__logo:hover .header__logo-img {
  opacity: 0.75;
}

[data-theme="dark"] .header__logo-img {
  filter: invert(1);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header__nav a {
  font-size: 14px;
  font-weight: 500;
  color: #5f6368;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 48px;
  transition: all 0.2s ease;
  position: relative;
}

.header__nav a:hover {
  color: #1a73e8;
  background: rgba(26, 115, 232, 0.08);
}

.header__nav a.active {
  color: #1a73e8;
  background: rgba(26, 115, 232, 0.1);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

/* Mobile menu toggle */
.header__menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: #5f6368;
}

.header__menu-btn svg {
  width: 24px;
  height: 24px;
}

/* --- Hero --- */
.hero {
  padding: 160px 0 80px;
  background: linear-gradient(180deg, #ffffff 0%, #f0f2f5 100%);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 60px;
  align-items: center;
}

.hero__content {
  max-width: 720px;
}

.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__diagram {
  width: 100%;
  max-width: 320px;
  height: auto;
}

.hero__line {
  animation: heroDash 2s linear infinite;
}

@keyframes heroDash {
  to { stroke-dashoffset: -16; }
}

.hero__dot {
  animation: heroPulse 2s ease-in-out infinite;
}

.hero__dot--1 {
  animation-delay: 0s;
}

.hero__dot--2 {
  animation-delay: 0.5s;
}

@keyframes heroPulse {
  0%, 100% { r: 4; opacity: 1; }
  50% { r: 6; opacity: 0.6; }
}

.hero__label {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #1a73e8;
  margin-bottom: 24px;
  padding: 6px 16px;
  border-radius: 48px;
  background: rgba(26, 115, 232, 0.08);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(26, 115, 232, 0.15);
}

.hero__title {
  font-size: 3.5rem;
  font-weight: 700;
  color: #202124;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 24px;
}

.hero__subtitle {
  font-size: 1.25rem;
  color: #5f6368;
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 600px;
}

.hero__stats {
  font-size: 1rem;
  font-weight: 500;
  color: #202124;
  margin-bottom: 32px;
}

.hero__stats span {
  color: #1a73e8;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__social {
  display: flex;
  gap: 12px;
  margin-top: 32px;
}

.hero__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: #5f6368;
  background: rgba(255, 255, 255, 0.6);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.04),
    0 1px 4px rgba(0, 0, 0, 0.06),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.8);
  transition: all 0.25s ease;
}

.hero__social a:hover {
  color: #1a73e8;
  background: rgba(232, 240, 254, 0.7);
  border-color: rgba(26, 115, 232, 0.25);
  box-shadow:
    0 0 0 0.5px rgba(26, 115, 232, 0.1),
    0 2px 8px rgba(26, 115, 232, 0.15),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
}

/* --- Buttons (Liquid Glass) --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  border-radius: 48px;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  min-height: 48px;
}

.btn--primary {
  background: rgba(26, 115, 232, 0.88);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  backdrop-filter: blur(12px) saturate(180%);
  color: #ffffff;
  border: 1px solid rgba(26, 115, 232, 0.3);
  box-shadow:
    0 0 0 0.5px rgba(26, 115, 232, 0.2),
    0 2px 8px rgba(26, 115, 232, 0.2),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.25);
}

.btn--primary:hover {
  background: rgba(23, 78, 166, 0.92);
  color: #ffffff;
  box-shadow:
    0 0 0 0.5px rgba(26, 115, 232, 0.25),
    0 4px 16px rgba(26, 115, 232, 0.3),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
}

.btn--outline {
  background: rgba(255, 255, 255, 0.55);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  backdrop-filter: blur(12px) saturate(180%);
  color: #1a73e8;
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.04),
    0 1px 4px rgba(0, 0, 0, 0.06),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.8);
}

.btn--outline:hover {
  background: rgba(232, 240, 254, 0.6);
  border-color: rgba(26, 115, 232, 0.25);
  color: #1a73e8;
  box-shadow:
    0 0 0 0.5px rgba(26, 115, 232, 0.1),
    0 2px 8px rgba(26, 115, 232, 0.12),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.9);
  transform: translateY(-1px);
}

.btn--text {
  background: transparent;
  color: #1a73e8;
  padding: 12px 16px;
}

.btn--text:hover {
  background: rgba(232, 240, 254, 0.5);
  color: #174ea6;
}

.btn--text .arrow {
  transition: transform 0.2s ease;
}

.btn--text:hover .arrow {
  transform: translateX(4px);
}

/* --- About --- */
.about__grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: start;
}

.about__image {
  width: 280px;
  height: 280px;
  border-radius: 20px;
  object-fit: cover;
  position: sticky;
  top: 96px;
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.04),
    0 4px 16px rgba(0, 0, 0, 0.08),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.5);
}

.about__text p {
  font-size: 1.0625rem;
  line-height: 1.8;
}

.about__text p + p {
  margin-top: 20px;
}

.about__actions {
  margin-top: 32px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* --- Stats / Achievements (Liquid Glass Cards) --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  border-radius: 20px;
  padding: 32px 24px;
  text-align: center;
  transition: all 0.3s ease;
}

.stat-card:hover {
  background: rgba(255, 255, 255, 0.72);
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.05),
    0 4px 20px rgba(0, 0, 0, 0.08),
    0 8px 32px rgba(0, 0, 0, 0.04),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.9);
  transform: translateY(-4px);
}

.stat-card__number {
  font-size: 2rem;
  font-weight: 700;
  color: #1a73e8;
  margin-bottom: 4px;
}

.stat-card__label {
  font-size: 1rem;
  font-weight: 600;
  color: #202124;
  margin-bottom: 8px;
}

.stat-card__desc {
  font-size: 0.875rem;
  color: #5f6368;
  line-height: 1.5;
}

/* --- Skills (Glass Tags) --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.skill-group__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: #202124;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #1a73e8;
  display: inline-block;
}

.skill-group__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.5);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 48px;
  font-size: 14px;
  color: #3c4043;
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.03),
    0 1px 3px rgba(0, 0, 0, 0.04),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.7);
  transition: all 0.25s ease;
}

.skill-tag:hover {
  background: rgba(232, 240, 254, 0.6);
  border-color: rgba(26, 115, 232, 0.25);
  color: #1a73e8;
  box-shadow:
    0 0 0 0.5px rgba(26, 115, 232, 0.1),
    0 2px 8px rgba(26, 115, 232, 0.12),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.9);
  transform: translateY(-1px);
}

/* --- Portfolio (Glass Cards) --- */
.portfolio-filters {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.portfolio-filters button {
  padding: 8px 20px;
  border-radius: 48px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.45);
  -webkit-backdrop-filter: blur(10px) saturate(180%);
  backdrop-filter: blur(10px) saturate(180%);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: #5f6368;
  cursor: pointer;
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.03),
    0 1px 3px rgba(0, 0, 0, 0.04),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.7);
  transition: all 0.25s ease;
}

.portfolio-filters button:hover {
  background: rgba(232, 240, 254, 0.6);
  border-color: rgba(26, 115, 232, 0.2);
  color: #1a73e8;
}

.portfolio-filters button.active {
  background: rgba(26, 115, 232, 0.85);
  -webkit-backdrop-filter: blur(12px) saturate(200%);
  backdrop-filter: blur(12px) saturate(200%);
  color: #ffffff;
  border-color: rgba(26, 115, 232, 0.3);
  box-shadow:
    0 0 0 0.5px rgba(26, 115, 232, 0.2),
    0 2px 8px rgba(26, 115, 232, 0.2),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.2);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.portfolio-card {
  border-radius: 20px;
  overflow: hidden;
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
}

.portfolio-card:hover {
  background: rgba(255, 255, 255, 0.72);
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.05),
    0 4px 20px rgba(0, 0, 0, 0.08),
    0 8px 32px rgba(0, 0, 0, 0.04),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.9);
  color: inherit;
  transform: translateY(-2px);
}

.portfolio-card__image {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: rgba(248, 249, 250, 0.5);
}

.portfolio-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.portfolio-card:hover .portfolio-card__image img {
  transform: scale(1.05);
}

.portfolio-card__body {
  padding: 20px;
}

.portfolio-card__category {
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #1a73e8;
  margin-bottom: 8px;
}

.portfolio-card__title {
  font-size: 1rem;
  font-weight: 600;
  color: #202124;
  margin-bottom: 4px;
}

.portfolio-card__subtitle {
  font-size: 0.875rem;
  color: #5f6368;
}

/* --- Blog Cards (Google Blog Style + Glass) --- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.blog-card {
  border-radius: 20px;
  overflow: hidden;
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  background: rgba(255, 255, 255, 0.72);
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.05),
    0 4px 20px rgba(0, 0, 0, 0.08),
    0 8px 32px rgba(0, 0, 0, 0.04),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.9);
  color: inherit;
  transform: translateY(-2px);
}

.blog-card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.blog-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.blog-card:hover .blog-card__image img {
  transform: scale(1.05);
}

.blog-card__body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card__category {
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #1a73e8;
  margin-bottom: 12px;
}

.blog-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: #202124;
  line-height: 1.4;
  margin-bottom: 12px;
  transition: color 0.2s ease;
}

.blog-card:hover .blog-card__title {
  color: #1a73e8;
}

.blog-card__excerpt {
  font-size: 0.9375rem;
  color: #5f6368;
  line-height: 1.6;
  margin-bottom: 16px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card__meta {
  font-size: 13px;
  color: #a1a1a6;
  margin-top: auto;
}

/* Featured blog card (hero style + glass) */
.blog-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-radius: 24px;
  overflow: hidden;
  margin-bottom: 48px;
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
}

.blog-featured:hover {
  background: rgba(255, 255, 255, 0.72);
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.05),
    0 8px 32px rgba(0, 0, 0, 0.1),
    0 16px 48px rgba(0, 0, 0, 0.05),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.9);
  color: inherit;
  transform: translateY(-2px);
}

.blog-featured__image {
  overflow: hidden;
  min-height: 320px;
}

.blog-featured__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.blog-featured:hover .blog-featured__image img {
  transform: scale(1.05);
}

.blog-featured__body {
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.blog-featured__category {
  font-size: 14px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #1a73e8;
  margin-bottom: 16px;
}

.blog-featured__title {
  font-size: 1.75rem;
  font-weight: 600;
  color: #202124;
  line-height: 1.3;
  margin-bottom: 16px;
}

.blog-featured:hover .blog-featured__title {
  color: #1a73e8;
}

.blog-featured__excerpt {
  font-size: 1rem;
  color: #5f6368;
  line-height: 1.7;
  margin-bottom: 24px;
}

.blog-featured__meta {
  font-size: 14px;
  color: #a1a1a6;
}

/* --- Work Areas (Glass Cards) --- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.work-card {
  padding: 32px;
  border-radius: 20px;
  transition: all 0.3s ease;
}

.work-card:hover {
  background: rgba(255, 255, 255, 0.72);
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.05),
    0 4px 20px rgba(0, 0, 0, 0.08),
    0 8px 32px rgba(0, 0, 0, 0.04),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.9);
  transform: translateY(-4px);
}

.work-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(26, 115, 232, 0.1);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: #1a73e8;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 20px;
  border: 1px solid rgba(26, 115, 232, 0.12);
  box-shadow: inset 0 0.5px 0 rgba(255, 255, 255, 0.5);
}

.work-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: #202124;
  margin-bottom: 8px;
}

.work-card__desc {
  font-size: 0.9375rem;
  color: #5f6368;
  line-height: 1.6;
}

.work-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.work-card__tags span {
  font-size: 0.8125rem;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(26, 115, 232, 0.08);
  color: #1a73e8;
  font-weight: 500;
  line-height: 1.5;
}

/* --- Expertise Accordion --- */
.expertise-accordion {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-radius: 20px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.expertise-row {
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.expertise-row:last-child {
  border-bottom: none;
}

.expertise-row__header {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 32px 0 32px;
}

.expertise-row__icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: #1a73e8;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.expertise-row__info {
  flex: 1;
  min-width: 0;
}

.expertise-row__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: #202124;
}

.expertise-row__body {
  padding: 12px 32px 28px 100px;
}

.expertise-row__desc {
  font-size: 0.9375rem;
  color: #5f6368;
  line-height: 1.6;
  margin-bottom: 16px;
}

.expertise-row__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.expertise-row__tags span {
  font-size: 0.8125rem;
  padding: 5px 14px;
  border-radius: 20px;
  background: rgba(0, 0, 0, 0.04);
  color: #80868b;
  font-weight: 400;
  line-height: 1.4;
}

@media (max-width: 768px) {
  .expertise-row__header {
    padding: 20px 20px 0 20px;
    gap: 16px;
  }
  .expertise-row__body {
    padding: 12px 20px 24px 20px;
  }
  .expertise-row__icon {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  .expertise-row__title {
    font-size: 1rem;
  }
}

/* --- Contact (Glass Elements) --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact__info h3 {
  margin-bottom: 24px;
}

.contact__item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  align-items: flex-start;
}

.contact__item-icon {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: rgba(26, 115, 232, 0.1);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: #1a73e8;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 16px;
  border: 1px solid rgba(26, 115, 232, 0.12);
  box-shadow: inset 0 0.5px 0 rgba(255, 255, 255, 0.5);
}

.contact__item-text {
  font-size: 0.9375rem;
  line-height: 1.6;
}

.contact__item-text strong {
  display: block;
  color: #202124;
  font-weight: 600;
  margin-bottom: 2px;
}

.contact__social {
  display: flex;
  gap: 12px;
  margin-top: 32px;
}

.contact__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.55);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: #5f6368;
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.04),
    0 1px 4px rgba(0, 0, 0, 0.06),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.8);
  transition: all 0.25s ease;
  font-size: 18px;
}

.contact__social a:hover {
  color: #1a73e8;
  background: rgba(232, 240, 254, 0.7);
  border-color: rgba(26, 115, 232, 0.25);
  box-shadow:
    0 0 0 0.5px rgba(26, 115, 232, 0.1),
    0 2px 8px rgba(26, 115, 232, 0.15),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
}

/* --- Press Mentions --- */
.press-mentions {
  text-align: center;
}

.press-mentions__label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #9aa0a6;
  margin-bottom: 20px;
}

.press-mentions__logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.press-mentions__item {
  text-decoration: none;
  opacity: 0.35;
  transition: opacity 0.3s ease;
  padding: 8px 16px;
}

.press-mentions__item:hover {
  opacity: 0.7;
}

.press-mentions__logo {
  height: 48px;
  width: auto;
  filter: grayscale(100%);
  transition: filter 0.3s ease;
}

.press-mentions__item:hover .press-mentions__logo {
  filter: grayscale(0%);
}

[data-theme="dark"] .press-mentions__label {
  color: #6e6e73;
}

[data-theme="dark"] .press-mentions__logo {
  filter: grayscale(100%) invert(1);
}

[data-theme="dark"] .press-mentions__item:hover .press-mentions__logo {
  filter: grayscale(0%) invert(1);
}

/* --- Footer (Glass) --- */
.footer {
  background: rgba(248, 249, 250, 0.6);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  backdrop-filter: blur(16px) saturate(180%);
  border-top: 1px solid rgba(255, 255, 255, 0.5);
  padding: 32px 0;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__text {
  font-size: 14px;
  color: #a1a1a6;
}

.footer__links {
  display: flex;
  gap: 24px;
}

.footer__links a {
  font-size: 14px;
  color: #5f6368;
}

.footer__links a:hover {
  color: #1a73e8;
}

/* --- Blog Post Page (Article) --- */
.article-hero {
  width: 100%;
  max-height: 480px;
  overflow: hidden;
  margin-top: 64px;
}

.article-hero img {
  width: 100%;
  height: 480px;
  object-fit: cover;
}

.article-header {
  padding: 48px 0 0;
}

.article-header__category {
  font-size: 14px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #1a73e8;
  margin-bottom: 16px;
}

.article-header__title {
  font-size: 2.5rem;
  font-weight: 700;
  color: #202124;
  line-height: 1.2;
  margin-bottom: 16px;
}

.article-header__meta {
  font-size: 15px;
  color: #a1a1a6;
}

.article-header__meta a {
  color: #5f6368;
  font-weight: 500;
}

.article-body {
  padding: 48px 0 80px;
  font-size: 1.0625rem;
  line-height: 1.9;
}

.article-body h2 {
  margin: 48px 0 16px;
  font-size: 1.75rem;
}

.article-body h3 {
  margin: 32px 0 12px;
  font-size: 1.375rem;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul,
.article-body ol {
  margin: 16px 0;
  padding-left: 24px;
}

.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }

.article-body li {
  margin-bottom: 8px;
}

.article-body figure {
  margin: 32px 0;
}

.article-body figcaption {
  font-size: 14px;
  color: #a1a1a6;
  text-align: center;
  margin-top: 8px;
}

.article-body blockquote {
  border-left: 4px solid #1a73e8;
  padding: 16px 24px;
  margin: 24px 0;
  background: rgba(255, 255, 255, 0.5);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  backdrop-filter: blur(12px) saturate(180%);
  border-radius: 0 16px 16px 0;
  font-style: italic;
  color: #3c4043;
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.03),
    0 1px 4px rgba(0, 0, 0, 0.04),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.7);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 15px;
  background: rgba(255, 255, 255, 0.5);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  backdrop-filter: blur(12px) saturate(180%);
  border-radius: 16px;
  overflow: hidden;
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.04),
    0 1px 4px rgba(0, 0, 0, 0.04);
}

.article-body th,
.article-body td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(232, 234, 237, 0.6);
}

.article-body th {
  background: rgba(248, 249, 250, 0.6);
  font-weight: 600;
  color: #202124;
}

.article-body .callout-box {
  background: rgba(232, 240, 254, 0.5);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  backdrop-filter: blur(12px) saturate(180%);
  border-radius: 16px;
  padding: 24px;
  margin: 24px 0;
  border: 1px solid rgba(26, 115, 232, 0.1);
  box-shadow: inset 0 0.5px 0 rgba(255, 255, 255, 0.7);
}

/* Reading progress bar (Glass) */
.progress-bar {
  position: fixed;
  top: 64px;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, #1a73e8, #30d158);
  z-index: 999;
  transition: width 0.1s linear;
  box-shadow: 0 0 8px rgba(26, 115, 232, 0.4);
}

/* --- Blog Page (Listing) --- */
.blog-page-header {
  padding: 120px 0 48px;
  text-align: center;
}

.blog-page-header h1 {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.blog-page-header p {
  font-size: 1.125rem;
  color: #5f6368;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  h1 { font-size: 2.5rem; }
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { display: none; }
  .hero__title { font-size: 2.75rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
  .work-grid { grid-template-columns: repeat(2, 1fr); }
  .blog-featured { grid-template-columns: 1fr; }
  .blog-featured__body { padding: 32px; }
}

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  .hero { padding: 120px 0 56px; }
  .hero__title { font-size: 2.25rem; }
  .hero__subtitle { font-size: 1.0625rem; }

  .header__nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    z-index: 999;
    background: rgba(255, 255, 255, 0.97);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
    backdrop-filter: blur(24px) saturate(200%);
    flex-direction: column;
    padding: 12px 24px 24px;
    gap: 0;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    border-radius: 0 0 20px 20px;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 0.3s ease,
                transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none;
    display: flex;
  }
  .header__nav.open {
    max-height: 500px;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .header__nav a {
    font-size: 17px;
    font-weight: 500;
    padding: 16px 16px;
    margin: 2px 0;
    border-bottom: none;
    border-radius: 12px;
    width: 100%;
    color: #202124;
    background: none;
    transition: background 0.2s ease, color 0.2s ease;
  }
  .header__nav a:hover {
    color: #1a73e8;
    background: rgba(26, 115, 232, 0.06);
  }
  .header__nav a.active {
    color: #1a73e8;
    background: rgba(26, 115, 232, 0.08);
  }
  .header__nav a::after { display: none; }
  .header__menu-btn { display: block; }
  .header__nav .theme-toggle--mobile {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 17px;
    font-weight: 500;
    padding: 16px;
    margin: 2px 0;
    border: none;
    border-radius: 12px;
    width: 100%;
    background: none;
    color: #202124;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
  }
  .header__nav .theme-toggle--mobile:hover {
    color: #1a73e8;
    background: rgba(26, 115, 232, 0.06);
  }
  .header__nav .theme-toggle--mobile i {
    font-size: 18px;
    width: 20px;
    text-align: center;
  }
  .header__nav .theme-toggle--mobile .fa-sun { display: none; }
  .header__nav .theme-toggle--mobile .fa-moon { display: inline-block; }
  [data-theme="dark"] .header__nav .theme-toggle--mobile {
    color: #f5f5f7;
  }
  [data-theme="dark"] .header__nav .theme-toggle--mobile:hover {
    color: #0a84ff;
    background: rgba(10, 132, 255, 0.08);
  }
  [data-theme="dark"] .header__nav .theme-toggle--mobile .fa-sun { display: inline-block; }
  [data-theme="dark"] .header__nav .theme-toggle--mobile .fa-moon { display: none; }

  [data-theme="dark"] .header__nav {
    background: rgba(28, 28, 30, 0.97);
    border-top-color: rgba(255, 255, 255, 0.06);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  }
  [data-theme="dark"] .header__nav a {
    color: #f5f5f7;
  }
  [data-theme="dark"] .header__nav a:hover {
    color: #0a84ff;
    background: rgba(10, 132, 255, 0.08);
  }
  [data-theme="dark"] .header__nav a.active {
    color: #0a84ff;
    background: rgba(10, 132, 255, 0.1);
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }
  .about__image {
    width: 200px;
    height: 200px;
    position: static;
    margin: 0 auto;
  }
  .about__text p {
    text-align: left;
  }
  .about__actions {
    justify-content: center;
  }
  .hero__social {
    justify-content: center;
  }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .work-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; text-align: center; }
  .blog-featured__body { padding: 24px; }
  .blog-featured__title { font-size: 1.375rem; }

  .article-header__title { font-size: 1.75rem; }
  .blog-page-header { padding: 96px 0 32px; }
  .blog-page-header h1 { font-size: 2rem; }
}

@media (max-width: 480px) {
  .hero__title { font-size: 1.875rem; }
  .stats-grid { grid-template-columns: 1fr; }
  .hero__actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
}

/* --- Utility --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.hidden { display: none !important; }

/* ============================================
   Animations & Transitions
   ============================================ */

/* --- Scroll-triggered reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Slide from left */
.reveal--left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal--left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Slide from right */
.reveal--right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal--right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Scale up */
.reveal--scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal--scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger children — each child delays progressively */
.stagger-children > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 80ms; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 160ms; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 240ms; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 320ms; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 400ms; }
.stagger-children.visible > *:nth-child(7) { transition-delay: 480ms; }
.stagger-children.visible > *:nth-child(8) { transition-delay: 560ms; }
.stagger-children.visible > *:nth-child(9) { transition-delay: 640ms; }
.stagger-children.visible > *:nth-child(10) { transition-delay: 720ms; }
.stagger-children.visible > *:nth-child(n+11) { transition-delay: 800ms; }

.stagger-children.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* --- Hero entrance animation --- */
@keyframes heroFadeUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.hero__label {
  animation: heroFadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both;
}

.hero__title {
  animation: heroFadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
}

.hero__subtitle {
  animation: heroFadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.35s both;
}

.hero__stats {
  animation: heroFadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.45s both;
}

.hero__actions {
  animation: heroFadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.55s both;
}

.hero__social {
  animation: heroFadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.7s both;
}

/* --- Header entrance --- */
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-100%);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.header {
  animation: slideDown 0.6s cubic-bezier(0.16, 1, 0.3, 1) 0s both;
}

/* --- Section label underline animation --- */
.section__label {
  position: relative;
  overflow: hidden;
}

.section__label::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: #1a73e8;
  transform: translateX(-100%);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.visible .section__label::after,
.section__label.visible::after {
  transform: translateX(0);
}

/* --- Stat number count-up shimmer --- */
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.stat-card.visible .stat-card__number {
  background: linear-gradient(90deg, #1a73e8 0%, #30d158 25%, #1a73e8 50%, #30d158 75%, #1a73e8 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 3s linear 0.5s 1;
}

/* --- Skill tag pop-in --- */
.skill-group__list.stagger-children > * {
  transform: translateY(12px) scale(0.9);
}

.skill-group__list.stagger-children.visible > * {
  transform: translateY(0) scale(1);
}

/* --- About image reveal --- */
@keyframes imageReveal {
  from {
    opacity: 0;
    transform: scale(0.9);
    filter: blur(8px);
  }
  to {
    opacity: 1;
    transform: scale(1);
    filter: blur(0);
  }
}

.about__image.reveal--scale.visible {
  animation: imageReveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* --- Blog featured card entrance --- */
.blog-featured.reveal--scale {
  transform: scale(0.95);
}

.blog-featured.reveal--scale.visible {
  transform: scale(1);
}

/* ============================================
   Dark Mode
   ============================================ */

/* Theme toggle button */
.theme-toggle--mobile {
  display: none;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.45);
  -webkit-backdrop-filter: blur(10px) saturate(180%);
  backdrop-filter: blur(10px) saturate(180%);
  cursor: pointer;
  color: #5f6368;
  font-size: 16px;
  transition: all 0.3s ease;
  box-shadow:
    0 0 0 0.5px rgba(0, 0, 0, 0.04),
    0 1px 3px rgba(0, 0, 0, 0.06),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.7);
  margin-left: 8px;
}

@media (max-width: 768px) {
  .theme-toggle { display: none !important; }
}

.theme-toggle:hover {
  background: rgba(232, 240, 254, 0.6);
  color: #1a73e8;
  transform: rotate(20deg);
}

.theme-toggle .fa-sun { display: none; }
.theme-toggle .fa-moon { display: inline-block; }

/* Dark mode colors */
[data-theme="dark"] {
  --bg-primary: #000000;
  --bg-secondary: #1c1c1e;
  --bg-surface: rgba(255, 255, 255, 0.05);
  --bg-surface-hover: rgba(255, 255, 255, 0.08);
  --glass-bg: rgba(44, 44, 46, 0.8);
  --glass-bg-hover: rgba(58, 58, 60, 0.8);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.12);
  --glass-highlight: rgba(255, 255, 255, 0.06);
  --text-primary: #f5f5f7;
  --text-secondary: #a1a1a6;
  --text-muted: #6e6e73;
  --accent: #0a84ff;
  --accent-hover: #409cff;
  --accent-surface: rgba(10, 132, 255, 0.12);
  --accent-border: rgba(10, 132, 255, 0.2);
  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] body {
  background: var(--bg-primary);
  color: var(--text-secondary);
}

[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6 {
  color: var(--text-primary);
}

[data-theme="dark"] a {
  color: var(--accent);
}

[data-theme="dark"] a:hover {
  color: var(--accent-hover);
}

/* Header dark */
[data-theme="dark"] .header {
  background: rgba(0, 0, 0, 0.72);
  border-bottom-color: rgba(255, 255, 255, 0.06);
  box-shadow: none;
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
}

[data-theme="dark"] .header--scrolled {
  background: rgba(28, 28, 30, 0.85);
  box-shadow: 0 0.5px 0 rgba(255, 255, 255, 0.06);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
}

[data-theme="dark"] .header__logo {
  color: var(--text-primary);
}

[data-theme="dark"] .header__logo:hover {
  color: var(--text-primary);
}

[data-theme="dark"] .header__nav a {
  color: var(--text-secondary);
}

[data-theme="dark"] .header__nav a:hover {
  color: var(--accent);
  background: var(--accent-surface);
}

[data-theme="dark"] .header__nav a.active {
  color: var(--accent);
  background: var(--accent-surface);
}

[data-theme="dark"] .header__menu-btn {
  color: var(--text-secondary);
}

/* Theme toggle dark state */
[data-theme="dark"] .theme-toggle {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.04),
    0 1px 3px rgba(0, 0, 0, 0.3),
    inset 0 0.5px 0 var(--glass-highlight);
}

[data-theme="dark"] .theme-toggle:hover {
  background: var(--accent-surface);
  color: var(--accent);
}

[data-theme="dark"] .theme-toggle .fa-sun { display: inline-block; }
[data-theme="dark"] .theme-toggle .fa-moon { display: none; }

/* Hero dark */
[data-theme="dark"] .hero {
  background: linear-gradient(180deg, #1c1c1e 0%, #000000 100%);
}

[data-theme="dark"] .hero__label {
  color: var(--accent);
  background: var(--accent-surface);
  border-color: var(--accent-border);
}

[data-theme="dark"] .hero__title {
  color: var(--text-primary);
}

[data-theme="dark"] .hero__subtitle {
  color: var(--text-secondary);
}

[data-theme="dark"] .hero__stats {
  color: var(--text-primary);
}

[data-theme="dark"] .hero__stats span {
  color: var(--accent);
}

[data-theme="dark"] .hero__diagram rect {
  fill: rgba(10, 132, 255, 0.06);
  stroke: rgba(10, 132, 255, 0.2);
}

[data-theme="dark"] .hero__diagram rect:nth-of-type(4) {
  fill: rgba(10, 132, 255, 0.1);
  stroke: rgba(10, 132, 255, 0.3);
}

[data-theme="dark"] .hero__diagram text[fill="#202124"] {
  fill: #f5f5f7;
}

[data-theme="dark"] .hero__diagram text[fill="#80868b"] {
  fill: #a1a1a6;
}

[data-theme="dark"] .hero__diagram line[stroke="#1a73e8"] {
  stroke: #0a84ff;
}

[data-theme="dark"] .hero__diagram circle[fill="#1a73e8"] {
  fill: #0a84ff;
}

[data-theme="dark"] .hero__diagram circle[stroke="#1a73e8"] {
  stroke: #0a84ff;
}

[data-theme="dark"] .hero__diagram polygon[fill="#1a73e8"] {
  fill: #0a84ff;
}

[data-theme="dark"] .hero__diagram rect[stroke="#1a73e8"] {
  stroke: #0a84ff;
}

[data-theme="dark"] .hero__social a {
  color: var(--text-secondary);
  background: var(--glass-bg);
  border-color: var(--glass-border);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.04),
    0 1px 4px rgba(0, 0, 0, 0.3),
    inset 0 0.5px 0 var(--glass-highlight);
}

[data-theme="dark"] .hero__social a:hover {
  color: var(--accent);
  background: var(--accent-surface);
  border-color: var(--accent-border);
  box-shadow:
    0 0 0 0.5px rgba(10, 132, 255, 0.1),
    0 2px 8px rgba(10, 132, 255, 0.15),
    inset 0 0.5px 0 var(--glass-highlight);
}

/* Section dark */
[data-theme="dark"] .section--gray {
  background: rgba(28, 28, 30, 0.5);
}

[data-theme="dark"] .section__label {
  color: var(--accent);
}

[data-theme="dark"] .section__label::after {
  background: var(--accent);
}

[data-theme="dark"] .section__title {
  color: var(--text-primary);
}

[data-theme="dark"] .section__subtitle {
  color: var(--text-secondary);
}

/* Glass cards dark */
[data-theme="dark"] .glass,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .work-card,
[data-theme="dark"] .portfolio-card,
[data-theme="dark"] .blog-card,
[data-theme="dark"] .blog-featured {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  backdrop-filter: blur(20px) saturate(150%);
  border-color: var(--glass-border);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.04),
    0 2px 8px rgba(0, 0, 0, 0.2),
    inset 0 0.5px 0 var(--glass-highlight);
}

[data-theme="dark"] .stat-card:hover,
[data-theme="dark"] .work-card:hover,
[data-theme="dark"] .portfolio-card:hover,
[data-theme="dark"] .blog-card:hover,
[data-theme="dark"] .blog-featured:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.06),
    0 4px 20px rgba(0, 0, 0, 0.35),
    0 8px 32px rgba(0, 0, 0, 0.2),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.1);
}

/* Stat card dark */
[data-theme="dark"] .stat-card__number {
  color: var(--accent);
}

[data-theme="dark"] .stat-card__label {
  color: var(--text-primary);
}

[data-theme="dark"] .stat-card__desc {
  color: var(--text-secondary);
}

[data-theme="dark"] .stat-card.visible .stat-card__number {
  background: linear-gradient(90deg, #0a84ff 0%, #30d158 25%, #0a84ff 50%, #30d158 75%, #0a84ff 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Buttons dark */
[data-theme="dark"] .btn--primary {
  background: rgba(10, 132, 255, 0.2);
  color: var(--accent);
  border: 1px solid var(--accent-border);
  box-shadow:
    0 0 0 0.5px rgba(10, 132, 255, 0.1),
    0 2px 8px rgba(10, 132, 255, 0.1),
    inset 0 0.5px 0 var(--glass-highlight);
}

[data-theme="dark"] .btn--primary:hover {
  background: rgba(10, 132, 255, 0.3);
  color: var(--accent-hover);
  box-shadow:
    0 0 0 0.5px rgba(10, 132, 255, 0.15),
    0 4px 16px rgba(10, 132, 255, 0.2),
    inset 0 0.5px 0 rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .btn--outline {
  background: var(--glass-bg);
  color: var(--accent);
  border-color: var(--glass-border);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.04),
    0 1px 4px rgba(0, 0, 0, 0.2),
    inset 0 0.5px 0 var(--glass-highlight);
}

[data-theme="dark"] .btn--outline:hover {
  background: var(--accent-surface);
  border-color: var(--accent-border);
  color: var(--accent);
}

/* Work card dark */
[data-theme="dark"] .work-card__icon {
  background: var(--accent-surface);
  color: var(--accent);
  border-color: var(--accent-border);
}

[data-theme="dark"] .work-card__title {
  color: var(--text-primary);
}

[data-theme="dark"] .work-card__desc {
  color: var(--text-secondary);
}

[data-theme="dark"] .work-card__tags span {
  background: var(--accent-surface);
  color: var(--accent);
}

/* Expertise accordion dark */
[data-theme="dark"] .expertise-accordion {
  background: rgba(44, 44, 46, 0.6);
  border-color: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .expertise-row {
  border-bottom-color: rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .expertise-row__icon {
  background: var(--accent);
  color: #fff;
}

[data-theme="dark"] .expertise-row__title {
  color: var(--text-primary);
}

[data-theme="dark"] .expertise-row__desc {
  color: var(--text-secondary);
}

[data-theme="dark"] .expertise-row__tags span {
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.45);
}

/* Skills dark */
[data-theme="dark"] .skill-group__title {
  color: var(--text-primary);
  border-bottom-color: var(--accent);
}

[data-theme="dark"] .skill-tag {
  background: var(--glass-bg);
  border-color: var(--glass-border);
  color: var(--text-secondary);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.03),
    0 1px 3px rgba(0, 0, 0, 0.2),
    inset 0 0.5px 0 var(--glass-highlight);
}

[data-theme="dark"] .skill-tag:hover {
  background: var(--accent-surface);
  border-color: var(--accent-border);
  color: var(--accent);
}

/* Portfolio dark */
[data-theme="dark"] .portfolio-filters button {
  background: var(--glass-bg);
  border-color: var(--glass-border);
  color: var(--text-secondary);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.03),
    0 1px 3px rgba(0, 0, 0, 0.2),
    inset 0 0.5px 0 var(--glass-highlight);
}

[data-theme="dark"] .portfolio-filters button:hover {
  background: var(--accent-surface);
  border-color: var(--accent-border);
  color: var(--accent);
}

[data-theme="dark"] .portfolio-filters button.active {
  background: rgba(10, 132, 255, 0.2);
  color: var(--accent);
  border-color: var(--accent-border);
}

[data-theme="dark"] .portfolio-card__image {
  background: rgba(255, 255, 255, 0.03);
}

[data-theme="dark"] .portfolio-card__category {
  color: var(--accent);
}

[data-theme="dark"] .portfolio-card__title {
  color: var(--text-primary);
}

[data-theme="dark"] .portfolio-card__subtitle {
  color: var(--text-secondary);
}

/* Blog cards dark */
[data-theme="dark"] .blog-card__category,
[data-theme="dark"] .blog-featured__category {
  color: var(--accent);
}

[data-theme="dark"] .blog-card__title,
[data-theme="dark"] .blog-featured__title {
  color: var(--text-primary);
}

[data-theme="dark"] .blog-card:hover .blog-card__title,
[data-theme="dark"] .blog-featured:hover .blog-featured__title {
  color: var(--accent);
}

[data-theme="dark"] .blog-card__excerpt,
[data-theme="dark"] .blog-featured__excerpt {
  color: var(--text-secondary);
}

[data-theme="dark"] .blog-card__meta,
[data-theme="dark"] .blog-featured__meta {
  color: var(--text-muted);
}

/* About dark */
[data-theme="dark"] .about__image {
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.06),
    0 4px 16px rgba(0, 0, 0, 0.4),
    inset 0 0.5px 0 var(--glass-highlight);
}

[data-theme="dark"] .about__text p {
  color: var(--text-secondary);
}

[data-theme="dark"] .about__text strong {
  color: var(--text-primary);
}

/* Contact dark */
[data-theme="dark"] .contact__item-icon {
  background: var(--accent-surface);
  color: var(--accent);
  border-color: var(--accent-border);
}

[data-theme="dark"] .contact__item-text strong {
  color: var(--text-primary);
}

[data-theme="dark"] .contact__social a {
  background: var(--glass-bg);
  border-color: var(--glass-border);
  color: var(--text-secondary);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.04),
    0 1px 4px rgba(0, 0, 0, 0.3),
    inset 0 0.5px 0 var(--glass-highlight);
}

[data-theme="dark"] .contact__social a:hover {
  color: var(--accent);
  background: var(--accent-surface);
  border-color: var(--accent-border);
}

/* Footer dark */
[data-theme="dark"] .footer {
  background: rgba(28, 28, 30, 0.6);
  border-top-color: var(--glass-border);
}

[data-theme="dark"] .footer__text {
  color: var(--text-muted);
}

[data-theme="dark"] .footer__links a {
  color: var(--text-secondary);
}

[data-theme="dark"] .footer__links a:hover {
  color: var(--accent);
}

/* Blog page header dark */
[data-theme="dark"] .blog-page-header h1 {
  color: var(--text-primary);
}

[data-theme="dark"] .blog-page-header p {
  color: var(--text-secondary);
}

/* Article page dark */
[data-theme="dark"] .article-header__title {
  color: var(--text-primary);
}

[data-theme="dark"] .article-header__category {
  color: var(--accent);
}

[data-theme="dark"] .article-header__meta {
  color: var(--text-muted);
}

[data-theme="dark"] .article-body {
  color: var(--text-secondary);
}

[data-theme="dark"] .article-body h2,
[data-theme="dark"] .article-body h3 {
  color: var(--text-primary);
}

[data-theme="dark"] .article-body blockquote {
  background: var(--glass-bg);
  border-left-color: var(--accent);
  color: var(--text-secondary);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.03),
    0 1px 4px rgba(0, 0, 0, 0.2),
    inset 0 0.5px 0 var(--glass-highlight);
}

[data-theme="dark"] .article-body table {
  background: var(--glass-bg);
  box-shadow:
    0 0 0 0.5px rgba(255, 255, 255, 0.04),
    0 1px 4px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .article-body th {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
}

[data-theme="dark"] .article-body th,
[data-theme="dark"] .article-body td {
  border-bottom-color: var(--glass-border);
}

.article-body .image-credits {
  margin-top: 48px;
  padding: 16px 20px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.02);
  border: 1px solid rgba(0, 0, 0, 0.04);
  opacity: 0.45;
  transition: opacity 0.3s ease;
}

.article-body .image-credits:hover {
  opacity: 0.75;
}

.article-body .image-credits h4 {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #80868b;
  margin-bottom: 8px;
}

.article-body .image-credits p,
.article-body .image-credits li {
  font-size: 11px;
  line-height: 1.5;
  color: #9aa0a6;
  margin-bottom: 4px;
}

.article-body .image-credits ul {
  margin: 6px 0 0;
  padding-left: 16px;
}

.article-body .image-credits a {
  color: #9aa0a6;
  text-decoration: underline;
  text-decoration-color: rgba(0, 0, 0, 0.1);
}

.article-body .image-credits a:hover {
  color: #5f6368;
}

[data-theme="dark"] .article-body .image-credits {
  background: rgba(255, 255, 255, 0.02);
  border-color: rgba(255, 255, 255, 0.04);
}

[data-theme="dark"] .article-body .image-credits h4 {
  color: #6e6e73;
}

[data-theme="dark"] .article-body .image-credits p,
[data-theme="dark"] .article-body .image-credits li {
  color: #6e6e73;
}

[data-theme="dark"] .article-body .image-credits a {
  color: #6e6e73;
  text-decoration-color: rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .article-body .image-credits a:hover {
  color: #a1a1a6;
}

[data-theme="dark"] .article-body .callout-box {
  background: var(--accent-surface);
  border-color: var(--accent-border);
}

/* Progress bar dark */
[data-theme="dark"] .progress-bar {
  background: linear-gradient(90deg, #0a84ff, #30d158);
  box-shadow: 0 0 8px rgba(10, 132, 255, 0.4);
}

/* Mobile nav dark */
/* Dark mobile nav handled in responsive section above */

/* Smooth theme transition */
html {
  transition: background-color 0.3s ease;
}

html body,
html .header,
html .hero,
html .section--gray,
html .footer,
html .stat-card,
html .work-card,
html .portfolio-card,
html .blog-card,
html .blog-featured,
html .skill-tag,
html .btn--primary,
html .btn--outline,
html .portfolio-filters button,
html .hero__social a,
html .contact__social a,
html .theme-toggle {
  transition-property: background-color, color, border-color, box-shadow;
  transition-duration: 0.3s;
  transition-timing-function: ease;
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal, .reveal--left, .reveal--right, .reveal--scale,
  .stagger-children > * {
    opacity: 1 !important;
    transform: none !important;
  }
}