:root {
  /* Default: Monochrome Slate (Elegant Dark-on-Light Aesthetic) */
  --primary-color: #111827;
  --accent-color: #4b5563;
  --accent-contrast: #000000;

  /* Layout Colors */
  --text-color: #111827; /* Gray 900 for modern deep text */
  --bg-color: #ffffff;
  --secondary-color: #f9fafb; /* Gray 50 */
  --border-color: #e5e7eb; /* Gray 200 */
  
  /* Derived Colors (Dynamic) */
  --pill-bg: color-mix(in srgb, var(--primary-color) 12%, transparent);
  --pill-text: var(--accent-contrast); 
  --pill-border: color-mix(in srgb, var(--primary-color) 25%, transparent);
  
  --focus-outline: 3px solid var(--primary-color);
  --shadow-color: rgba(0, 0, 0, 0.08);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Theme: Blue */
[data-color-theme="blue"] {
  --primary-color: #1d4ed8;
  --accent-color: #60a5fa;
  --accent-contrast: #1e40af;
}

/* Theme: Indigo */
[data-color-theme="indigo"] {
  --primary-color: #6366f1;
  --accent-color: #8b5cf6;
  --accent-contrast: #3730a3;
}

/* Theme: Emerald */
[data-color-theme="emerald"] {
  --primary-color: #059669;
  --accent-color: #10b981;
  --accent-contrast: #064e3b;
}

/* Theme: Rose */
[data-color-theme="rose"] {
  --primary-color: #e11d48;
  --accent-color: #fb7185;
  --accent-contrast: #9f1239;
}

/* Theme: Slate (Monochrome) */
[data-color-theme="slate"] {
  --primary-color: #111827;
  --accent-color: #4b5563;
  --accent-contrast: #000000;
}

[data-theme="dark"][data-color-theme="slate"] {
  --primary-color: #f9fafb;
  --accent-color: #9ca3af;
  --accent-contrast: #ffffff;
  --pill-bg: rgba(255, 255, 255, 0.05); /* Very subtle white tint on black */
}

[data-theme="dark"] {
  --accent-contrast: var(--accent-color);
  --text-color: #f1f3f5;
  --bg-color: #121212;
  --secondary-color: #1e1e1e;
  --border-color: #343a40;
  --shadow-color: rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  color: var(--text-color);
  background-color: var(--bg-color);
  line-height: 1.6;
  font-size: clamp(1rem, 1vw + 0.8rem, 1.125rem);
  transition: background-color 0.3s ease, color 0.3s ease;
  position: relative;
}

/* ===================
   AMBIENT BACKGROUND
=================== */
.ambient-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  transition: background 0.5s ease, transform 0.5s ease;
  will-change: transform;
}

.blob-1 {
  top: -10%;
  left: -10%;
  width: 45vw;
  height: 45vw;
  background: var(--primary-color);
  animation: floatBlobs 25s ease-in-out infinite alternate;
}

.blob-2 {
  bottom: -10%;
  right: -5%;
  width: 35vw;
  height: 35vw;
  background: var(--accent-color);
  animation: floatBlobs 20s ease-in-out infinite alternate-reverse;
}

.blob-3 {
  top: 40%;
  left: 60%;
  width: 25vw;
  height: 25vw;
  background: var(--primary-color);
  opacity: 0.15;
  animation: floatBlobs 30s ease-in-out infinite alternate;
}

@keyframes floatBlobs {
  0% { transform: translate(0, 0) scale(1) rotate(0deg); }
  33% { transform: translate(4%, 8%) scale(1.1) rotate(10deg); }
  66% { transform: translate(-4%, 4%) scale(0.9) rotate(-5deg); }
  100% { transform: translate(2%, -2%) scale(1) rotate(5deg); }
}

[data-theme="dark"] .blob {
  opacity: 0.18;
}

a {
  color: var(--primary-color);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.2s ease, text-decoration-thickness 0.2s ease;
}

a:hover, a:focus {
  text-decoration-thickness: 2px;
}

a:focus-visible, button:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===================
   HEADER
=================== */
.sticky-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: color-mix(in srgb, var(--bg-color) 75%, transparent);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid color-mix(in srgb, var(--border-color) 60%, transparent);
  margin-bottom: 2rem;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  box-shadow: 0 1px 10px rgba(0, 0, 0, 0.02);
}

.header-container {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 0;
  flex-wrap: nowrap;
  min-width: 0;
}

.header-content {
  flex: 1;
  min-width: 0;
}

.header h1 {
  font-size: clamp(1.15rem, 5vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 0.1rem;
  letter-spacing: -0.03em;
  line-height: 1.2;
  white-space: nowrap;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}

.headline {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.3rem;
  letter-spacing: -0.01em;
  line-height: 1.4;
  word-wrap: break-word;
}

/* Desktop nav */
.header-nav {
  display: flex;
  gap: 1.25rem;
  flex-shrink: 0;
}

.header-nav a {
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-color);
  opacity: 0.7;
  white-space: nowrap;
  transition: opacity 0.2s ease, color 0.2s ease;
}

.header-nav a:hover,
.header-nav a.active {
  opacity: 1;
  color: var(--primary-color);
}

.header-nav a.active::after {
  content: '';
  display: block;
  height: 2px;
  background-color: var(--primary-color);
  margin-top: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

/* Unified Theme Menu */
.theme-menu-wrapper {
  position: relative;
}

.theme-dropdown {
  position: absolute;
  top: 130%;
  right: 0;
  background-color: color-mix(in srgb, var(--secondary-color) 70%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid color-mix(in srgb, var(--border-color) 60%, transparent);
  border-radius: 16px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 200;
  min-width: 190px;
}

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

.dropdown-section {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.dropdown-section span {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-color);
  opacity: 0.7;
  font-weight: 700;
}

.mode-toggle-btn {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  color: var(--text-color);
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s;
  width: 100%;
  text-align: center;
  font-weight: 600;
  font-family: inherit;
}

.mode-toggle-btn:hover {
  border-color: var(--primary-color);
}

/* Color Switcher */
.color-picker {
  display: flex;
  gap: 0.5rem;
}

.color-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.2s ease, border-color 0.2s ease;
  padding: 0;
}

.color-dot:hover {
  transform: scale(1.3);
}

.color-dot.active {
  border-color: var(--text-color);
  transform: scale(1.1);
}

.color-dot[data-theme-btn="blue"] { background-color: #2563eb; }
.color-dot[data-theme-btn="indigo"] { background-color: #6366f1; }
.color-dot[data-theme-btn="emerald"] { background-color: #059669; }
.color-dot[data-theme-btn="rose"] { background-color: #e11d48; }
.color-dot[data-theme-btn="slate"] { background-color: #111827; }

.action-btn {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0 0.65rem;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-color);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.82rem;
  transition: all 0.2s ease;
  white-space: nowrap;
}

/* Main Content Fade */
#main-content {
  transition: opacity 0.3s ease-in-out;
}

#main-content.fading {
  opacity: 0;
}

.nav-link {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.3s ease;
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

.nav-link:hover {
  color: var(--primary-color);
}

.nav-link.active {
  color: var(--primary-color);
}

.nav-link.active::after {
  width: 100%;
}

.action-btn:hover {
  background-color: var(--secondary-color);
  border-color: var(--primary-color);
  transform: translateY(-2px);
}

#theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-color);
  transition: background-color 0.2s ease, transform 0.2s ease;
  flex-shrink: 0;
}

#theme-toggle:hover {
  background-color: var(--secondary-color);
  transform: scale(1.05);
}

.theme-icon {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* ===================
   HAMBURGER MENU
=================== */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  padding: 0.55rem 0.6rem;
  flex-shrink: 0;
  transition: background-color 0.2s ease;
}

.mobile-menu-btn:hover {
  background-color: var(--secondary-color);
}

.hamburger-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-color);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.mobile-menu-btn.is-open .hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-btn.is-open .hamburger-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.mobile-menu-btn.is-open .hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile drawer */
.mobile-menu {
  max-height: 0;
  overflow: hidden;
  border-top: 1px solid transparent;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.3s ease, padding 0.35s ease;
  background-color: color-mix(in srgb, var(--bg-color) 85%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.mobile-menu.is-open {
  max-height: 500px;
  border-top-color: var(--border-color);
}

.mobile-menu nav {
  display: flex;
  flex-direction: column;
  padding: 0.75rem 1.5rem 0.5rem;
  gap: 0.25rem;
}

.mobile-nav-link {
  display: block;
  padding: 0.625rem 0.75rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-color);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.mobile-nav-link:hover {
  background-color: var(--secondary-color);
  color: var(--primary-color);
}

.mobile-actions {
  display: flex;
  gap: 0.75rem;
  padding: 0.5rem 1.5rem 1rem;
  flex-wrap: wrap;
}

/* Responsive breakpoints */
@media (max-width: 950px) {
  .header-nav,
  .header-actions {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
}

@media (min-width: 951px) {
  .mobile-menu-btn,
  .mobile-menu {
    display: none !important;
  }
}

/* ===================
   SCROLL PROGRESS
=================== */
#scroll-progress-container {
  width: 100%;
  height: 3px;
  background-color: transparent;
  position: relative;
}

#scroll-progress-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(to right, var(--primary-color), var(--accent-color));
  transition: width 0.1s linear;
}

/* ===================
   HERO SECTION
=================== */
.hero-section {
  padding: 1.5rem 0 2.5rem;
}

.hero-content-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
}

.hero-text {
  flex: 1.2;
}

.big-summary {
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  font-weight: 500;
  line-height: 1.7;
  letter-spacing: -0.01em;
  margin-bottom: 0;
  color: var(--text-color);
  opacity: 0.9;
}

.hero-actions-row {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

/* CTAs */
.cta-primary-btn {
  background-color: var(--primary-color);
  color: var(--bg-color); /* Dynamic contrast */
  padding: 0.9rem 2rem;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: 0 4px 15px color-mix(in srgb, var(--primary-color) 40%, transparent);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.cta-primary-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px color-mix(in srgb, var(--primary-color) 50%, transparent);
}

.cta-secondary-btn {
  background-color: var(--secondary-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 0.9rem 1.5rem;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  transition: all 0.2s ease;
}

.cta-secondary-btn:hover {
  background-color: var(--bg-color);
  border-color: var(--primary-color);
  color: var(--primary-color);
  transform: translateY(-3px);
}

/* Mobile Hero */
@media (max-width: 768px) {
  .hero-content-wrapper {
    flex-direction: column-reverse;
    text-align: center;
    gap: 2rem;
  }
  .hero-actions-row {
    justify-content: center;
  }
  .profile-blob {
    width: 200px;
    height: 200px;
  }
}

/* ===================
   SECTIONS
=================== */
.section {
  margin-bottom: 5rem;
  scroll-margin-top: 6rem;
}

.section h2 {
  font-size: 1.3rem;
  font-weight: 800;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.6rem;
  margin-bottom: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ... existing skill-card styles shifted below ... */

/* ===================
   FOOTER ENHANCEMENTS
=================== */
.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.footer-lighthouse {
  display: flex;
  gap: 2rem;
  padding: 1rem 2rem;
  background-color: var(--secondary-color);
  border-radius: 50px;
  border: 1px solid var(--border-color);
}

.lighthouse-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
}

.lh-svg {
  width: 24px;
  height: 24px;
  transform: rotate(-90deg);
}

.lh-bg {
  fill: none;
  stroke: var(--border-color);
  stroke-width: 3.8;
}

.lh-progress {
  fill: none;
  stroke: #28a745;
  stroke-width: 3.8;
  stroke-linecap: round;
}

/* Skill achievements list */
.achievement-list {
  margin-top: 0.75rem;
  padding-left: 1rem;
  font-size: 0.85rem;
  opacity: 0.9;
  border-left: 2px solid color-mix(in srgb, var(--primary-color) 20%, transparent);
}

.achievement-list li {
  margin-bottom: 0.4rem;
  list-style: none;
}

.achievement-list li::before {
  content: '→';
  margin-right: 0.5rem;
  color: var(--primary-color);
  font-weight: bold;
}

.section h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

/* ===================
   CARDS (common hover)
=================== */
.skill-card, .project-card, .education-item {
  background-color: color-mix(in srgb, var(--secondary-color) 60%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 1.5rem;
  border-radius: 18px;
  border: 1px solid color-mix(in srgb, var(--border-color) 45%, transparent);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease, border-color 0.3s ease, background-color 0.3s ease;
  box-shadow: 0 4px 20px rgba(0,0,0,0.02);
}

.skill-card:hover, .project-card:hover, .education-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 32px color-mix(in srgb, var(--shadow-color) 40%, transparent);
  border-color: color-mix(in srgb, var(--primary-color) 60%, transparent);
  background-color: color-mix(in srgb, var(--secondary-color) 85%, transparent);
}

/* ===================
   SKILLS
=================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.skill-icon-container {
  width: 48px;
  height: 48px;
  background-color: var(--pill-bg);
  color: var(--primary-color);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  transition: transform 0.3s ease, background-color 0.3s ease;
}

.skill-card:hover .skill-icon-container {
  transform: scale(1.1) rotate(5deg);
  background-color: var(--primary-color);
  color: var(--bg-color);
}

.skill-icon-container svg {
  width: 24px;
  height: 24px;
}

.skill-category {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-contrast); /* Fixed Contrast for Accessibility */
  margin-bottom: 0.25rem;
  letter-spacing: 0.05em;
}

.skill-card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.15rem;
  line-height: 1.3;
}

.skill-card p {
  font-size: 0.95rem;
  opacity: 0.85;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.skill-tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  font-size: 0.72em;
  font-weight: 600;
  background-color: var(--pill-bg);
  color: var(--pill-text);
  border: 1px solid var(--pill-border);
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  display: inline-block;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.skill-card:hover .skill-tag {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

/* ===================
   PROJECTS
=================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.project-card h3 {
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.project-card h3 a {
  color: inherit;
  text-decoration: none;
}

.project-card h3 a:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

.project-card p {
  font-size: 0.95em;
  margin-bottom: 1rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ===================
   PILLS & BADGES
=================== */
.tech-pill {
  font-size: 0.72em;
  font-weight: 600;
  background-color: var(--pill-bg);
  color: var(--pill-text);
  border: 1px solid var(--pill-border);
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  display: inline-block;
  white-space: nowrap;
}

.exp-period {
  font-size: 0.82em;
  background-color: var(--pill-bg);
  color: var(--pill-text);
  border: 1px solid var(--pill-border);
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-weight: 600;
  display: inline-block;
  white-space: nowrap;
  margin-bottom: 0.5rem;
}

/* Live Badge */
.live-badge {
  font-size: 0.72em;
  background-color: #28a745;
  color: #ffffff;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  margin-left: 0.75rem;
  vertical-align: middle;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.live-badge::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: #ffffff;
  border-radius: 50%;
  animation: pulse-badge 1.5s infinite;
}

@keyframes pulse-badge {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.5; }
  100% { transform: scale(1); opacity: 1; }
}

/* ===================
   TIMELINE / EXPERIENCE
=================== */
.timeline-container {
  position: relative;
  padding-left: 2.5rem;
  margin-left: 0.5rem;
}

.timeline-container::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary-color), var(--accent-color), transparent);
}

.experience-item {
  position: relative;
  margin-bottom: 2.5rem;
  background-color: color-mix(in srgb, var(--secondary-color) 60%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 1.75rem;
  border-radius: 18px;
  border: 1px solid color-mix(in srgb, var(--border-color) 45%, transparent);
  box-shadow: 0 4px 20px rgba(0,0,0,0.02);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease, border-color 0.3s ease, background-color 0.3s ease;
}

.experience-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 32px color-mix(in srgb, var(--shadow-color) 40%, transparent);
  border-color: color-mix(in srgb, var(--primary-color) 60%, transparent);
  background-color: color-mix(in srgb, var(--secondary-color) 85%, transparent);
}

.experience-item::before {
  content: '';
  position: absolute;
  left: -2.85rem;
  top: 1.9rem;
  width: 14px;
  height: 14px;
  background-color: var(--bg-color);
  border: 3px solid var(--primary-color);
  border-radius: 50%;
  z-index: 2;
  transition: transform 0.3s ease, background-color 0.3s ease;
}

.experience-item:hover::before {
  transform: scale(1.5);
  background-color: var(--primary-color);
}

.experience-item:last-child {
  margin-bottom: 0;
}

.exp-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
  gap: 0.5rem;
}

.exp-company {
  font-weight: 700;
  font-size: 1.1rem;
}

.exp-title {
  font-style: italic;
  font-weight: 500;
  color: var(--primary-color);
  margin-bottom: 0.25rem;
}

.exp-responsibilities {
  margin-left: 1.25rem;
  list-style-type: disc;
}

.exp-responsibilities li {
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.exp-responsibilities li::marker {
  color: var(--primary-color);
}

/* ===================
   TWO COLUMN
=================== */
.two-column {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 4rem;
}

@media (min-width: 768px) {
  .two-column {
    grid-template-columns: 1fr 1fr;
    margin-bottom: 0;
  }
}

/* ===================
   EDUCATION
=================== */
.education-item {
  margin-bottom: 1.5rem;
}

.edu-school {
  font-weight: 700;
  font-size: 1.05rem;
}

.edu-degree {
  margin-bottom: 0.2rem;
  font-style: italic;
  opacity: 0.9;
}

/* ===================
   CERTIFICATIONS
=================== */
.cert-category {
  margin-bottom: 1.5rem;
  background-color: color-mix(in srgb, var(--secondary-color) 60%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 1.5rem;
  border-radius: 18px;
  border: 1px solid color-mix(in srgb, var(--border-color) 45%, transparent);
  box-shadow: 0 4px 20px rgba(0,0,0,0.02);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease, border-color 0.3s ease, background-color 0.3s ease;
}

.cert-category:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 32px color-mix(in srgb, var(--shadow-color) 40%, transparent);
  border-color: color-mix(in srgb, var(--primary-color) 60%, transparent);
  background-color: color-mix(in srgb, var(--secondary-color) 85%, transparent);
}

.cert-category h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.25rem;
  display: inline-block;
}

.cert-list {
  margin-left: 1.25rem;
  list-style-type: circle;
}

.cert-list li {
  margin-bottom: 0.4rem;
  font-size: 0.93em;
}

.cert-list li::marker {
  color: var(--primary-color);
}

/* ===================
   FOOTER
=================== */
.footer {
  text-align: center;
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
  font-size: 0.9em;
  margin-top: 4rem;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-color);
  opacity: 0.6;
  transition: all 0.3s ease;
}

.footer-links a:hover {
  color: var(--primary-color);
  opacity: 1;
  transform: translateY(-3px);
}

.footer-lighthouse {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.lighthouse-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--secondary-color);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  font-size: 0.75rem;
  font-weight: 600;
}

.lh-svg {
  width: 14px;
  height: 14px;
}

.lh-bg {
  stroke: var(--border-color);
  stroke-width: 4;
  fill: none;
}

.lh-progress {
  stroke: #28a745;
  stroke-width: 4;
  fill: none;
  stroke-linecap: round;
}

/* ===================
   SCROLL ANIMATIONS
=================== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  will-change: opacity, transform;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===================
   BACK TO TOP
=================== */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: #ffffff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px var(--shadow-color);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#scroll-progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background-color: rgba(var(--primary-rgb), 0.1);
  z-index: 1001;
}

#scroll-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(to right, var(--primary-color), var(--accent-color));
  transition: width 0.1s ease;
}

#back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#back-to-top:hover {
  background-color: var(--accent-color);
  transform: translateY(-5px);
}

#back-to-top svg {
  width: 26px;
  height: 26px;
  fill: currentColor;
}

[data-theme="dark"] #back-to-top {
  color: var(--bg-color);
}

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

/* ===================
   REDUCED MOTION
=================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===================
   PRINT
=================== */
@media print {
  @page { margin: 1.5cm; }

  body {
    background: #fff !important;
    color: #000 !important;
    font-size: 10pt;
  }

  .sticky-header {
    position: static !important;
    padding: 0 0 1rem 0 !important;
    border-bottom: 2px solid #000 !important;
    margin-bottom: 2rem !important;
    background: transparent !important;
    backdrop-filter: none !important;
  }

  #theme-toggle, #back-to-top, .header-nav, .header-actions,
  .mobile-menu-btn, .mobile-menu, #scroll-progress-container,
  .hero-actions-row, .footer-lighthouse {
    display: none !important;
  }

  .gradient-text {
    background: none !important;
    color: #000 !important;
    -webkit-text-fill-color: initial !important;
  }

  .hero-section {
    padding: 1rem 0 2rem !important;
  }

  .big-summary {
    font-size: 14pt !important;
  }

  .skill-card, .project-card, .experience-item, .education-item, .cert-category {
    break-inside: avoid;
    background: transparent !important;
    border: 1px solid #eee !important;
    box-shadow: none !important;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
  }

  .animate-on-scroll {
    opacity: 1 !important;
    transform: none !important;
  }

  .tech-pill, .exp-period {
    border: 1px solid #000 !important;
    color: #000 !important;
    background: transparent !important;
  }

  a { color: #000 !important; }
}