/* ========================================
   CSS Variables & Reset
   ======================================== */

:root {
  /* Colors */
  --color-bg: #faf9f6;
  --color-bg-alt: #f5f4f1;
  --color-text: #1a1a1a;
  --color-text-muted: #555555;
  --color-text-light: #888888;
  --color-accent: #0066ff;
  --color-accent-hover: #0052cc;
  --color-accent-light: rgba(0, 102, 255, 0.08);
  --color-border: #e5e5e5;
  --color-white: #ffffff;

  /* Typography */
  --font-heading: "Syne", -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 80px;

  /* Animation */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 0.15s;
  --duration-normal: 0.3s;
  --duration-slow: 0.6s;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul,
ol {
  list-style: none;
}

/* ========================================
   Scroll Progress Bar
   ======================================== */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: transparent;
  z-index: 1000;
}

.scroll-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-accent), #00aaff);
  transition: width 0.1s ease-out;
}

/* ========================================
   Typography
   ======================================== */

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.1;
}

/* ========================================
   Layout
   ======================================== */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-4xl) 0;
}

/* ========================================
   Fade In Up Animation
   ======================================== */

.fade-in-up {
  opacity: 0;
  transform: translateY(50px);
  transition:
    opacity 0.7s var(--ease-out),
    transform 0.7s var(--ease-out);
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Now grid doesn't need fade-in-up transform since cards animate individually */
.now-grid.fade-in-up {
  transform: none;
}

.now-grid.fade-in-up.visible {
  transform: none;
}

/* Stagger delays for siblings */
.fade-in-up:nth-child(1) {
  transition-delay: 0s;
}
.fade-in-up:nth-child(2) {
  transition-delay: 0.1s;
}
.fade-in-up:nth-child(3) {
  transition-delay: 0.15s;
}
.fade-in-up:nth-child(4) {
  transition-delay: 0.2s;
}
.fade-in-up:nth-child(5) {
  transition-delay: 0.25s;
}
.fade-in-up:nth-child(6) {
  transition-delay: 0.3s;
}

/* ========================================
   Navigation
   ======================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(250, 249, 246, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--duration-normal) var(--ease-out),
    background var(--duration-normal) var(--ease-out);
}

.nav.scrolled {
  border-bottom-color: var(--color-border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: var(--nav-height);
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  transition: opacity var(--duration-fast);
}

.nav-logo:hover {
  opacity: 0.7;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--duration-fast);
  position: relative;
}

.nav-links a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav-links a:not(.nav-cta):hover::after {
  width: 100%;
}

.nav-links a:hover {
  color: var(--color-accent);
}

.nav-cta {
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-text);
  color: var(--color-bg) !important;
  border-radius: 6px;
  transition:
    transform var(--duration-fast),
    background var(--duration-fast);
}

.nav-cta:hover {
  background: var(--color-accent);
  transform: translateY(-2px);
}

/* Hamburger Menu Button */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  padding: var(--space-sm);
  cursor: pointer;
  z-index: 101;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition:
    transform var(--duration-normal) var(--ease-out),
    opacity var(--duration-fast),
    background var(--duration-fast);
  transform-origin: center;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 99;
  background: var(--color-bg);
  padding: calc(var(--nav-height) + var(--space-2xl)) var(--space-xl)
    var(--space-2xl);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-20px);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    visibility var(--duration-slow),
    transform var(--duration-slow) var(--ease-out);
}

.mobile-menu.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.mobile-menu-links a {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  opacity: 0;
  transform: translateX(-30px);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out),
    color var(--duration-fast);
}

.mobile-menu.active .mobile-menu-links a {
  opacity: 1;
  transform: translateX(0);
}

.mobile-menu.active .mobile-menu-links a:nth-child(1) {
  transition-delay: 0.1s;
}
.mobile-menu.active .mobile-menu-links a:nth-child(2) {
  transition-delay: 0.15s;
}
.mobile-menu.active .mobile-menu-links a:nth-child(3) {
  transition-delay: 0.2s;
}
.mobile-menu.active .mobile-menu-links a:nth-child(4) {
  transition-delay: 0.25s;
}
.mobile-menu.active .mobile-menu-links a:nth-child(5) {
  transition-delay: 0.3s;
}
.mobile-menu.active .mobile-menu-links a:nth-child(6) {
  transition-delay: 0.35s;
}

.mobile-menu-links a:hover {
  color: var(--color-accent);
}

.mobile-menu-footer {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--duration-slow) var(--ease-out) 0.4s,
    transform var(--duration-slow) var(--ease-out) 0.4s;
}

.mobile-menu.active .mobile-menu-footer {
  opacity: 1;
  transform: translateY(0);
}

.mobile-social-links {
  display: flex;
  gap: var(--space-lg);
}

.mobile-social-links a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color var(--duration-fast);
}

.mobile-social-links a:hover {
  color: var(--color-accent);
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--nav-height) + var(--space-3xl)) 0
    calc(var(--space-4xl) + var(--space-3xl));
  position: relative;
}

.hero-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.hero-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent-light);
  border-radius: 50px;
  margin-bottom: var(--space-xl);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 0.2s forwards;
}

.status-dot {
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(0.9);
  }
}

.status-text {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 5.5rem);
  font-weight: 800;
  line-height: 1.05;
  margin-bottom: var(--space-xl);
  letter-spacing: -0.02em;
}

.hero-line {
  display: block;
  overflow: hidden;
}

.hero-word {
  display: inline-block;
  opacity: 0;
  transform: translateY(100%);
  animation: revealWord 0.8s var(--ease-out) forwards;
}

.hero-line:nth-child(1) .hero-word:nth-child(1) {
  animation-delay: 0.3s;
}
.hero-line:nth-child(1) .hero-word:nth-child(2) {
  animation-delay: 0.35s;
}
.hero-line:nth-child(2) .hero-word:nth-child(1) {
  animation-delay: 0.4s;
}
.hero-line:nth-child(2) .hero-word:nth-child(2) {
  animation-delay: 0.45s;
}
.hero-line:nth-child(2) .hero-word:nth-child(3) {
  animation-delay: 0.5s;
}
.hero-line:nth-child(3) .hero-word:nth-child(1) {
  animation-delay: 0.55s;
}
.hero-line:nth-child(3) .hero-word:nth-child(2) {
  animation-delay: 0.6s;
}
.hero-line:nth-child(3) .hero-word:nth-child(3) {
  animation-delay: 0.65s;
}

@keyframes revealWord {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-word.accent {
  color: var(--color-accent);
}

.hero-word.underline {
  position: relative;
}

.hero-word.underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0.1em;
  width: 100%;
  height: 0.12em;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  animation: underlineReveal 0.6s var(--ease-out) 1s forwards;
}

@keyframes underlineReveal {
  to {
    transform: scaleX(1);
  }
}

.hero-description {
  max-width: 600px;
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2xl);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 0.8s forwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: 0;
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 0.9s forwards;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 8px;
  transition: all var(--duration-normal) var(--ease-out);
}

.btn-primary {
  background: var(--color-text);
  color: var(--color-bg);
}

.btn-primary:hover {
  background: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-3px);
}

.btn-large {
  padding: var(--space-lg) var(--space-2xl);
  font-size: 1rem;
}

.btn svg {
  transition: transform var(--duration-normal) var(--ease-out);
}

.btn:hover svg {
  transform: translateX(4px);
}

/* Social Links */
.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 1s forwards;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color var(--duration-fast);
}

.social-link:hover {
  color: var(--color-accent);
}

.social-link svg {
  transition: transform var(--duration-normal) var(--ease-out);
}

.social-link:hover svg {
  transform: scale(1.15);
}

/* Scroll Indicator */
.hero-scroll {
  position: absolute;
  bottom: var(--space-2xl);
  left: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 1.2s forwards;
}

.hero-scroll span {
  font-size: 0.75rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.scroll-indicator {
  width: 24px;
  height: 40px;
  border: 2px solid var(--color-border);
  border-radius: 12px;
  position: relative;
}

.scroll-dot {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--color-text-muted);
  border-radius: 2px;
  animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
  }
  50% {
    transform: translateX(-50%) translateY(12px);
    opacity: 0.3;
  }
}

/* ========================================
   Section Headers
   ======================================== */

.section-header {
  margin-bottom: var(--space-3xl);
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: var(--space-sm);
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 500px;
}

/* ========================================
   Now Section
   ======================================== */

.now-section {
  background: var(--color-bg-alt);
}

.now-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  max-width: 100%;
}

.now-card {
  background: var(--color-white);
  padding: 1.5rem;
  border-radius: 16px;
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition:
    transform 0.4s var(--ease-out),
    box-shadow 0.4s var(--ease-out),
    border-color 0.3s var(--ease-out);
}

/* Staggered animation delays for Now cards */
.now-grid .now-card:nth-child(1) {
  transition-delay: 0s;
}
.now-grid .now-card:nth-child(2) {
  transition-delay: 0.08s;
}
.now-grid .now-card:nth-child(3) {
  transition-delay: 0.16s;
}
.now-grid .now-card:nth-child(4) {
  transition-delay: 0.24s;
}

.now-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), #00aaff);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}

.now-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 102, 255, 0.12);
  border-color: transparent;
}

.now-card:hover::before {
  transform: scaleX(1);
}

.now-emoji {
  font-size: 1.8rem;
  display: block;
  margin-bottom: var(--space-md);
  transition: transform 0.4s var(--ease-out);
}

.now-card:hover .now-emoji {
  transform: scale(1.1) rotate(-5deg);
}

.now-card h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.now-card p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  line-height: 1.7;
  margin-bottom: var(--space-md);
  flex-grow: 1;
}

.now-card-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-accent-light);
  border-radius: 4px;
  color: var(--color-accent);
  width: fit-content;
  transition:
    background 0.3s ease,
    color 0.3s ease;
}

.now-card:hover .now-card-tag {
  background: var(--color-accent);
  color: var(--color-white);
}

/* Now card staggered entrance animations */
.now-grid .now-card {
  opacity: 0;
  transform: translateY(40px);
}

.now-grid.visible .now-card {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 0.6s var(--ease-out),
    transform 0.6s var(--ease-out);
}

.now-grid.visible .now-card:nth-child(1) {
  transition-delay: 0.1s;
}
.now-grid.visible .now-card:nth-child(2) {
  transition-delay: 0.2s;
}
.now-grid.visible .now-card:nth-child(3) {
  transition-delay: 0.3s;
}
.now-grid.visible .now-card:nth-child(4) {
  transition-delay: 0.4s;
}

/* ========================================
   Experience/Timeline Section
   ======================================== */

.experience-section {
  background: var(--color-bg-alt);
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xl);
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent), transparent);
}

.timeline-block {
  padding-left: 0;
  position: relative;
}

.timeline-block-header {
  margin-bottom: var(--space-2xl);
  display: block;
  padding-left: 0;
}

.timeline-block-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

.timeline-entry {
  position: relative;
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  padding-left: 80px;
  border-bottom: 1px solid var(--color-border);
}

.timeline-entry:last-child {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -64px;
  top: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline-dot {
  width: 20px;
  height: 20px;
  background: var(--color-accent);
  border: 3px solid var(--color-bg-alt);
  border-radius: 50%;
  transition:
    transform 0.3s var(--ease-out),
    box-shadow 0.3s var(--ease-out);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.timeline-entry:hover .timeline-dot {
  transform: scale(1.3);
  box-shadow: 0 0 0 8px rgba(0, 102, 255, 0.15);
}

.timeline-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.timeline-entry-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

.timeline-date {
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.timeline-org {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-md) 0;
  font-weight: 500;
}

.timeline-details {
  color: var(--color-text-muted);
  line-height: 1.6;
  font-size: 0.95rem;
}

.timeline-details p {
  margin: var(--space-sm) 0;
}

.timeline-details ul {
  list-style-position: inside;
  margin: var(--space-md) 0;
  padding-left: var(--space-md);
}

.timeline-details li {
  margin: var(--space-sm) 0;
  list-style: disc;
}

.timeline-details strong {
  color: var(--color-text);
}

/* Timeline animations */
.timeline-entry {
  opacity: 0;
  transform: translateX(-20px);
}

.timeline.visible .timeline-entry {
  opacity: 1;
  transform: translateX(0);
  transition:
    opacity 0.6s var(--ease-out),
    transform 0.6s var(--ease-out);
}

.timeline.visible .timeline-entry:nth-child(1) {
  transition-delay: 0.1s;
}
.timeline.visible .timeline-entry:nth-child(2) {
  transition-delay: 0.2s;
}
.timeline.visible .timeline-entry:nth-child(3) {
  transition-delay: 0.3s;
}
.timeline.visible .timeline-entry:nth-child(4) {
  transition-delay: 0.4s;
}
.timeline.visible .timeline-entry:nth-child(5) {
  transition-delay: 0.5s;
}

/* Mobile responsiveness for timeline */
@media (max-width: 768px) {
  .timeline::before {
    left: 8px;
  }

  .timeline-entry {
    padding-left: 50px;
  }

  .timeline-marker {
    left: -44px;
  }

  .timeline-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
}

/* ========================================
   Work/Projects Section
   ======================================== */

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: var(--space-3xl);
}

.project-card {
  background: var(--color-white);
  border: 1px solid #e8e8e8;
  border-radius: 16px;
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  transition:
    transform 0.3s var(--ease-out),
    box-shadow 0.3s var(--ease-out),
    border-color 0.3s var(--ease-out);
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: #0066ff;
  box-shadow: 0 20px 40px rgba(0, 102, 255, 0.15);
}

.project-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: #1a1a1a;
}

.project-subtitle {
  font-size: 0.875rem;
  color: #666666;
  margin-bottom: var(--space-md);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: var(--space-md);
}

.project-tags span {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.25rem 0.625rem;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: 4px;
}

.project-description {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: #666666;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  flex-grow: 1;
}

/* Collapsible Project Details */
.project-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.project-detail-block {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
}

.project-detail-block summary {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  background: var(--color-bg-alt);
  color: var(--color-text);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.2s ease;
}

.project-detail-block summary::-webkit-details-marker {
  display: none;
}

.project-detail-block summary::after {
  content: "+";
  font-size: 1.25rem;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

.project-detail-block[open] summary::after {
  content: "-";
}

.project-detail-block summary:hover {
  background: var(--color-accent-light);
}

.project-detail-block ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: var(--space-md);
  background: var(--color-white);
}

.project-detail-block li {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  padding-left: var(--space-md);
  position: relative;
}

.project-detail-block li::before {
  content: "-";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* Project Stats Row */
.project-stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
}

.project-stats-row span {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #666666;
}

.project-stats-row span strong {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-accent);
}

/* Project Top Links */
.project-top-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: var(--space-md);
}

.project-github-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--duration-fast);
  text-decoration: none;
}

.project-github-link:hover {
  color: var(--color-accent);
}

.project-github-link svg {
  transition: transform var(--duration-fast) var(--ease-out);
}

.project-github-link:hover svg {
  transform: translateX(2px);
}

.project-medium-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--duration-fast);
  text-decoration: none;
}

.project-medium-link:hover {
  color: #00ab6c;
}

.project-medium-link svg {
  transition: transform var(--duration-fast) var(--ease-out);
}

.project-medium-link:hover svg {
  transform: translateX(2px);
}

/* Title Row with Demo Link */
.project-title-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.project-title-row .project-title {
  margin-bottom: 0;
}

.project-demo-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  transition:
    background var(--duration-fast),
    color var(--duration-fast);
}

.project-demo-link:hover {
  background: var(--color-accent);
  color: white;
}

/* Ongoing Title Row */
.ongoing-title-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Projects CTA */
.projects-cta {
  text-align: center;
}

/* ========================================
   On-Going Projects Section
   ======================================== */

.ongoing-projects-section {
  background: var(--color-bg);
}

.ongoing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  max-width: 100%;
}

.ongoing-card {
  background: var(--color-white);
  border: 2px dashed var(--color-border);
  padding: 1.5rem;
  border-radius: 12px;
  position: relative;
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  display: flex;
  flex-direction: column;
}

.ongoing-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out);
}

.ongoing-card:hover {
  border-color: var(--color-accent);
  background: rgba(0, 102, 255, 0.02);
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0, 102, 255, 0.08);
}

.ongoing-card:hover::before {
  transform: scaleX(1);
}

.ongoing-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  width: fit-content;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-accent-light);
  color: var(--color-accent);
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--space-md);
}

.ongoing-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 var(--space-xs) 0;
}

.ongoing-tagline {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
  margin: 0 0 var(--space-md) 0;
}

.ongoing-teaser {
  flex-grow: 1;
  margin-bottom: var(--space-md);
}

.ongoing-teaser p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 0;
}

.ongoing-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.ongoing-tech span {
  font-size: 0.75rem;
  padding: 4px 8px;
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  border-radius: 4px;
  font-weight: 500;
}

.ongoing-status {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* Ongoing projects animations */
.ongoing-card {
  opacity: 0;
  transform: translateY(30px);
}

.ongoing-grid.visible .ongoing-card,
.ongoing-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 0.6s var(--ease-out),
    transform 0.6s var(--ease-out);
}

.ongoing-grid .ongoing-card:nth-child(1) {
  transition-delay: 0.1s;
}
.ongoing-grid .ongoing-card:nth-child(2) {
  transition-delay: 0.2s;
}
.ongoing-grid .ongoing-card:nth-child(3) {
  transition-delay: 0.3s;
}
.ongoing-grid .ongoing-card:nth-child(4) {
  transition-delay: 0.4s;
}

/* Mobile responsiveness for ongoing projects */
@media (max-width: 768px) {
  .ongoing-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

/* ========================================
   Writing Section
   ======================================== */

.writing-section {
  background: var(--color-bg-alt);
  margin-bottom: 8rem;
}

.writing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-bottom: var(--space-3xl);
}

.writing-card {
  background: var(--color-white);
  padding: 2.5rem;
  border-radius: 16px;
  border: 1px solid #e8e8e8;
  transition:
    transform 0.3s var(--ease-out),
    box-shadow 0.3s var(--ease-out),
    border-color 0.3s var(--ease-out);
  display: flex;
  flex-direction: column;
}

.writing-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 102, 255, 0.12);
  border-color: #0066ff;
}

.writing-card:hover .writing-title {
  color: #0066ff;
}

.writing-card:hover .writing-link svg {
  transform: translateX(4px);
}

.writing-date {
  font-size: 0.8rem;
  color: #666666;
  margin-bottom: var(--space-md);
  text-transform: none;
  letter-spacing: normal;
}

.writing-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-md);
  color: #1a1a1a;
  transition: color 0.3s ease;
}

.writing-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.writing-tags span {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: 4px;
  font-weight: 600;
}

.writing-excerpt {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: #666666;
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  flex-grow: 1;
}

.writing-engagement {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.writing-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: gap 0.3s var(--ease-out);
}

.writing-link svg {
  transition: transform 0.3s var(--ease-out);
}

.writing-link:hover {
  gap: var(--space-md);
}

.writing-cta {
  text-align: center;
}

/* ========================================
   Skills Section
   ======================================== */

/* Filter buttons */
.skills-filter {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
  justify-content: center;
}

.filter-btn {
  padding: 0.5rem 1rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast);
  color: var(--color-text);
}

.filter-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.skill-category {
  background: var(--color-white);
  padding: 1rem;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  transition:
    transform var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal);
}

.skill-category:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent);
}

.skill-category-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.skill-emoji {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.skill-category-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.2;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.skill-tag {
  display: inline-block;
  padding: 0.4rem 0.7rem;
  background: var(--color-white);
  border: 1px solid #e0e0e0;
  border-radius: 5px;
  font-size: 0.75rem;
  font-weight: 500;
  transition: all var(--duration-fast);
  white-space: nowrap;
}

.skill-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

.skill-tag.core {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
  color: var(--color-accent);
  font-weight: 600;
}

.skill-tag.core:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

.skill-tag.badge {
  background: linear-gradient(135deg, #0066ff 0%, #0052cc 100%);
  border-color: transparent;
  color: var(--color-white);
  font-weight: 600;
  font-size: 0.7rem;
}

.skill-tag.badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 102, 255, 0.3);
}

.skill-tag.primary {
  background: var(--color-accent-light);
  border-color: transparent;
  color: var(--color-accent);
}

.skill-tag.primary:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

.skills-cta {
  text-align: center;
  margin-top: var(--space-2xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border);
}

.skills-note {
  margin-top: var(--space-md);
  font-size: 0.875rem;
  opacity: 0.6;
  font-style: italic;
}

/* ========================================
   Skills Page Styles
   ======================================== */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  font-size: 0.875rem;
  opacity: 0.6;
}

.breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity var(--duration-fast);
}

.breadcrumb a:hover {
  opacity: 0.8;
}

.page-title {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--space-lg);
  line-height: 1.1;
}

.page-subtitle {
  font-size: 1.125rem;
  opacity: 0.7;
  max-width: 600px;
}

.skills-toolbar {
  display: flex;
  gap: var(--space-lg);
  margin: var(--space-3xl) 0 var(--space-2xl);
  flex-wrap: wrap;
  align-items: center;
}

.skills-search {
  flex: 1;
  min-width: 250px;
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: var(--font-body);
  background: var(--color-white);
  transition: border-color var(--duration-fast);
}

.skills-search:focus {
  outline: none;
  border-color: var(--color-accent);
}

.skills-actions {
  display: flex;
  gap: var(--space-md);
}

.action-btn {
  padding: var(--space-sm) var(--space-md);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast);
}

.action-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.action-btn:active {
  background: var(--color-accent-light);
}

.skills-full-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-lg);
}

.skill-category-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  transition: all var(--duration-normal);
}

.skill-category-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(0, 102, 255, 0.1);
}

.skill-category-header-clickable {
  padding: var(--space-md);
  background: var(--color-bg-alt);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--duration-fast);
  user-select: none;
}

.skill-category-header-clickable:hover {
  background: #f5f4f2;
}

.skill-category-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0;
  flex: 1;
}

.skill-count {
  font-size: 0.75rem;
  opacity: 0.6;
  margin-right: var(--space-sm);
  font-weight: 500;
}

.toggle-icon {
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--color-accent);
  transition: transform var(--duration-fast);
}

.skill-category-card.expanded .toggle-icon {
  transform: rotate(180deg);
}

.skill-category-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-normal);
}

.skill-category-card.expanded .skill-category-content {
  max-height: 500px;
}

.skill-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: var(--space-md);
}

.skill-pill {
  display: inline-block;
  padding: 0.35rem 0.6rem;
  background: var(--color-white);
  border: 1px solid #e0e0e0;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 500;
  transition: all var(--duration-fast);
  white-space: nowrap;
}

.skill-pill:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}

.skill-pill.hidden {
  display: none;
}

.skill-category-card.hidden-category {
  display: none;
}

/* ========================================
   Certificates Section
   ======================================== */

.certificates-section {
  background: var(--color-bg-alt);
}

.certificates-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: var(--space-3xl);
}

.certificate-card {
  background: var(--color-white);
  border: 1px solid #e8e8e8;
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  transition:
    transform 0.3s var(--ease-out),
    box-shadow 0.3s var(--ease-out),
    border-color 0.3s var(--ease-out);
}

.certificate-card:hover {
  transform: translateY(-4px);
  border-color: #0066ff;
  box-shadow: 0 12px 32px rgba(0, 102, 255, 0.12);
}

.certificate-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}

.certificate-logo {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s var(--ease-out);
}

.certificate-card:hover .certificate-logo {
  transform: scale(1.08);
}

.certificate-logo svg {
  width: 100%;
  height: 100%;
}

.certificate-date {
  font-size: 0.7rem;
  color: #888888;
  background: var(--color-bg-alt);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
}

.certificate-name {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 0.25rem;
  line-height: 1.3;
}

.certificate-org {
  font-size: 0.8rem;
  color: #888888;
  margin-bottom: 0.75rem;
}

.certificate-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 0.875rem;
  flex-grow: 1;
}

.certificate-skills span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  padding: 0.2rem 0.4rem;
  background: var(--color-accent-light);
  color: var(--color-accent);
  border-radius: 3px;
}

.certificate-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: gap 0.3s var(--ease-out);
}

.certificate-link:hover {
  gap: 0.6rem;
}

.certificate-link svg {
  transition: transform 0.3s var(--ease-out);
  width: 14px;
  height: 14px;
}

.certificate-link:hover svg {
  transform: translate(2px, -2px);
}

.certificates-cta {
  text-align: center;
}

/* ========================================
   About Section
   ======================================== */

.about-section {
  background: var(--color-bg-alt);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-4xl);
  align-items: start;
}

.about-text {
  margin-bottom: var(--space-2xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.about-text p {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  text-align: center;
}

.about-facts h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  margin-bottom: var(--space-lg);
}

.facts-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
  transition: transform var(--duration-fast);
}

.facts-list li:hover {
  transform: translateX(8px);
}

.facts-list li:last-child {
  border-bottom: none;
}

.fact-emoji {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.about-image {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-xl));
}

.about-photo {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
  border-radius: 20px;
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-lg);
  transition:
    transform 0.3s var(--ease-out),
    box-shadow 0.3s var(--ease-out);
}

.about-photo:hover {
  transform: scale(1.02);
  box-shadow: 0 20px 50px rgba(0, 102, 255, 0.2);
}

.about-resume {
  text-align: center;
}

/* ========================================
   Footer
   ======================================== */

.footer {
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-4xl) 0 var(--space-2xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-4xl);
  margin-bottom: var(--space-4xl);
}

.footer-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-lg);
}

.footer-text {
  font-size: 1rem;
  opacity: 0.8;
  max-width: 500px;
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

.footer .btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.footer .btn-primary:hover {
  background: var(--color-white);
  color: var(--color-text);
}

.footer-links {
  display: flex;
  gap: var(--space-3xl);
}

.footer-col h3 {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  margin-bottom: var(--space-lg);
  opacity: 0.5;
}

.footer-col a {
  display: block;
  padding: var(--space-xs) 0;
  font-size: 0.9375rem;
  opacity: 0.8;
  transition:
    opacity var(--duration-fast),
    transform var(--duration-fast);
}

.footer-col a:hover {
  opacity: 1;
  transform: translateX(4px);
}

.footer-bottom {
  padding-top: var(--space-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
  opacity: 0.5;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 968px) {
  .now-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .ongoing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
  }

  .about-image {
    position: relative;
    top: 0;
    order: -1;
    max-width: 400px;
  }

  .skills-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .skills-full-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .writing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .certificates-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --space-3xl: 3rem;
    --space-4xl: 4rem;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-title {
    font-size: clamp(2rem, 10vw, 3.5rem);
  }

  .hero-scroll {
    display: none;
  }

  .now-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .ongoing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .project-card {
    padding: 1.5rem;
  }

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .skills-full-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .skills-toolbar {
    flex-direction: column;
  }

  .skills-search {
    min-width: 100%;
  }

  .writing-grid {
    grid-template-columns: 1fr;
  }

  .writing-card {
    padding: 1.5rem;
  }

  .writing-section {
    margin-bottom: 4rem;
  }

  .certificates-grid {
    grid-template-columns: 1fr;
  }

  .certificate-card {
    padding: 1.5rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-links {
    flex-direction: column;
    gap: var(--space-md);
  }

  .project-stats-row {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .project-tags {
    gap: 0.375rem;
  }

  .project-tags span {
    font-size: 0.7rem;
  }

  .skills-full-grid {
    grid-template-columns: 1fr;
  }

  .page-title {
    font-size: 2rem;
  }

  .skills-actions {
    width: 100%;
    flex-direction: column;
  }

  .action-btn {
    width: 100%;
  }

  .footer-links {
    flex-direction: column;
    gap: var(--space-2xl);
  }
}

/* ========================================
   Utilities
   ======================================== */

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

/* ========================================
   Floating Demo Bubble
   ======================================== */

.demo-bubble {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 999;
  font-family: var(--font-mono);
}

.demo-bubble-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1rem;
  background: #1a1a1a;
  color: #fff;
  border: 1px solid #333;
  border-radius: 50px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  transition:
    background 0.2s ease,
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

.demo-bubble-toggle:hover {
  background: #0066ff;
  border-color: #0066ff;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 102, 255, 0.3);
}

.demo-bubble-text {
  pointer-events: none;
}

.demo-bubble-text strong {
  color: #66b3ff;
}

.demo-bubble-toggle:hover .demo-bubble-text strong {
  color: #fff;
}

.demo-bubble-arrow {
  font-size: 1rem;
  line-height: 1;
}

.demo-bubble-dropdown {
  position: absolute;
  bottom: calc(100% + 0.5rem);
  right: 0;
  min-width: 200px;
  background: #1a1a1a;
  border: 1px solid #333;
  border-radius: 12px;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition:
    opacity 0.25s ease,
    visibility 0.25s ease,
    transform 0.25s ease;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.demo-bubble.open .demo-bubble-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.demo-bubble-label {
  font-size: 0.7rem;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.5rem 0.5rem;
  border-bottom: 1px solid #333;
  margin-bottom: 0.25rem;
}

.demo-bubble-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  color: #ccc;
  text-decoration: none;
  font-size: 0.825rem;
  border-radius: 8px;
  transition:
    background 0.15s ease,
    color 0.15s ease;
}

.demo-bubble-item:hover {
  background: rgba(0, 102, 255, 0.1);
  color: #fff;
}

.demo-bubble-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #0066ff;
  flex-shrink: 0;
}

@media (max-width: 480px) {
  .demo-bubble {
    bottom: 1rem;
    right: 1rem;
  }

  .demo-bubble-toggle {
    font-size: 0.75rem;
    padding: 0.5rem 0.75rem;
  }

  .demo-bubble-dropdown {
    min-width: 180px;
  }
}