/* ==========================================================================
   ALEXANDER CIZ YORI — MECHANICAL ENGINEERING PORTFOLIO
   Clean, Minimal, Modern Engineering-Grade Typography & Spacing
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  /* Dark Mode (Default) - Sophisticated Charcoal & Cyan */
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-card: rgba(17, 24, 39, 0.9);
  --bg-card-hover: #162032;
  --bg-glass: rgba(11, 15, 25, 0.68);

  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --accent: #38bdf8;
  --accent-rgb: 56, 189, 248;
  --accent-glow: rgba(56, 189, 248, 0.15);
  --accent-hover: #0ea5e9;

  --brand-green: #10b981;
  --brand-orange: #f59e0b;
  --brand-red: #ef4444;

  --border-color: rgba(156, 163, 175, 0.15);
  --border-active: rgba(56, 189, 248, 0.4);
  --grid-line: rgba(56, 189, 248, 0.04);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --transition: 0.2s ease;
}

[data-theme="light"] {
  --bg-primary: #fafafa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f3f4f6;
  --bg-card: rgba(255, 255, 255, 0.95);
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(250, 250, 250, 0.72);

  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;

  --accent: #0284c7;
  --accent-rgb: 2, 132, 199;
  --accent-glow: rgba(2, 132, 199, 0.1);
  --accent-hover: #0369a1;

  --border-color: rgba(0, 0, 0, 0.08);
  --border-active: rgba(2, 132, 199, 0.4);
  --grid-line: rgba(0, 0, 0, 0.03);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  transition: background-color var(--transition), color var(--transition);
}

/* Clean Background Grid */
.tech-grid-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: 
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  z-index: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--accent-hover);
}

code, .mono {
  font-family: var(--font-mono);
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

/* Navigation Bar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(24px) saturate(190%);
  -webkit-backdrop-filter: blur(24px) saturate(190%);
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.14);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  text-decoration: none;
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background: var(--bg-tertiary);
  color: var(--accent);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
}

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

/* Hamburger Toggle Button */
.nav-hamburger-btn {
  display: none;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 10px 8px;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition);
  z-index: 120;
}

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

.hamburger-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
  transform-origin: center;
}

.nav-hamburger-btn.open .hamburger-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-hamburger-btn.open .hamburger-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav-hamburger-btn.open .hamburger-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile Drawer Menu */
.mobile-nav-drawer {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: var(--bg-glass);
  border-bottom: 1px solid var(--border-active);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
  padding: 1.25rem 0 1.5rem 0;
  backdrop-filter: blur(28px) saturate(190%);
  -webkit-backdrop-filter: blur(28px) saturate(190%);
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.mobile-nav-drawer.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.mobile-drawer-inner {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-nav-link {
  display: block;
  padding: 0.65rem 0.85rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  background: transparent;
  transition: all var(--transition);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--accent);
  background: var(--bg-tertiary);
  padding-left: 1.15rem;
}

.mobile-drawer-divider {
  height: 1px;
  background: var(--border-color);
  margin: 0.25rem 0;
}

.mobile-drawer-actions {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.mobile-resume-btn {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.mobile-theme-btn {
  width: 100%;
  height: auto;
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: var(--radius-md);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.88rem;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}
.btn-primary:hover {
  background: var(--accent-hover);
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-active);
  color: var(--accent);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.3rem 0.75rem;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  color: #10b981;
  border-radius: 20px;
  margin-bottom: 1rem;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
}

/* Section Commons & Generous Spacing */
section {
  padding: 6.5rem 0;
}

.section-head {
  margin-bottom: 2.75rem;
}

.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  margin-bottom: 0.65rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.02rem;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.6;
}

/* Filter Bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 2.25rem;
}

.filter-btn {
  background: var(--bg-card);
  border: 1.5px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

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

.filter-btn.active {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
  font-weight: 600;
}

/* Hero Section: 2-Column Split (Intro on Left, Education Card on Right) */
.hero {
  padding: 6.5rem 0 5.5rem;
}

.hero-split-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: stretch;
}

.hero-intro-col {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-title {
  font-size: clamp(2.2rem, 4.2vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
}

.hero-title .highlight-text {
  color: var(--accent);
}

.hero-bio {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 0.5rem;
}

/* Education Card to the Right of Hero */
.hero-education-col {
  display: flex;
  flex-direction: column;
}

.hero-education-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
  height: 100%;
  box-shadow: var(--shadow-sm);
}

.edu-card-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.95rem;
}

.edu-card-kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 0.3rem;
}

.edu-card-title {
  font-size: 1.3rem;
  font-weight: 700;
}

.edu-card-items {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.edu-item-block {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding-bottom: 0.95rem;
  border-bottom: 1px dashed var(--border-color);
}

.edu-item-block:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.edu-item-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
}

.edu-item-school {
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--text-primary);
}

.edu-item-dates {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  white-space: nowrap;
}

.edu-item-degree {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 500;
}

.edu-item-grade {
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.edu-item-detail {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* ==========================================================================
   INTERACTIVE HORIZONTAL CARD CAROUSEL (Adaptive Light/Dark Buttons)
   ========================================================================== */

.carousel-nav-controls {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.carousel-counter {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  background: var(--bg-card);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.carousel-btn-group {
  display: flex;
  gap: 0.65rem;
}

.carousel-arrow-btn {
  background: var(--bg-card);
  border: 1.5px solid var(--border-color);
  color: var(--text-primary);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.carousel-arrow-btn svg {
  stroke: var(--text-primary);
  transition: stroke var(--transition);
}

.carousel-arrow-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(var(--accent-rgb), 0.35);
}

.carousel-arrow-btn:hover svg {
  stroke: #ffffff;
}

.carousel-arrow-btn:active {
  transform: translateY(1px);
}

.carousel-arrow-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  border-color: var(--border-color);
  background: var(--bg-tertiary);
  color: var(--text-muted);
  box-shadow: none;
  transform: none;
}

.carousel-arrow-btn:disabled svg {
  stroke: var(--text-muted);
}

/* Viewport Wrapper & Floating Track Arrows */
.carousel-viewport-wrapper {
  position: relative;
  width: 100%;
}

.carousel-track-arrow {
  display: none;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1.5px solid var(--border-color);
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(8px);
  transition: all var(--transition);
}

.carousel-track-arrow svg {
  stroke: var(--text-primary);
  transition: stroke var(--transition);
}

.carousel-track-arrow:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
  transform: translateY(-50%) scale(1.08);
  box-shadow: 0 6px 20px rgba(var(--accent-rgb), 0.4);
}

.carousel-track-arrow:hover svg {
  stroke: #ffffff;
}

.track-arrow-left {
  left: -22px;
}

.track-arrow-right {
  right: -22px;
}

@media (min-width: 1200px) {
  .carousel-track-arrow {
    display: flex;
  }
}

/* Viewport & Track */
.carousel-viewport {
  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE/Edge */
  padding: 0.5rem 0.25rem 1.5rem;
  cursor: grab;
  user-select: none;
}

.carousel-viewport::-webkit-scrollbar {
  display: none; /* Chrome/Safari */
}

.carousel-viewport.is-dragging {
  cursor: grabbing;
  scroll-behavior: auto;
  scroll-snap-type: none;
}

.carousel-track {
  display: flex;
  gap: 1.5rem;
  width: max-content;
}

/* Carousel Card */
.carousel-card {
  flex: 0 0 440px;
  max-width: 86vw;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.carousel-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-active);
  box-shadow: var(--shadow-md);
}

.carousel-media {
  width: 100%;
  height: 220px;
  background: #080c14;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.carousel-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  transition: transform 0.3s ease;
}

.carousel-card:hover .carousel-media img {
  transform: scale(1.03);
}

.carousel-badge-top {
  position: absolute;
  top: 0.85rem;
  left: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  background: rgba(11, 15, 25, 0.9);
  color: var(--accent);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(4px);
}

.carousel-3d-badge {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  background: rgba(56, 189, 248, 0.18);
  color: var(--accent);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent);
  backdrop-filter: blur(4px);
}

.carousel-body {
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex: 1;
}

.carousel-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.carousel-title {
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.45rem;
  line-height: 1.3;
}

.carousel-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1.15rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.carousel-metrics-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem;
  margin-bottom: 1rem;
}

.carousel-metric-item {
  display: flex;
  flex-direction: column;
}

.carousel-metric-lbl {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.carousel-metric-val {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--accent);
}

.carousel-footer {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding-top: 0.95rem;
  border-top: 1px solid var(--border-color);
}

.carousel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.carousel-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 0.22rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

/* Dots Pagination */
.carousel-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-color);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  padding: 0;
}

.carousel-dot:hover {
  background: var(--text-muted);
}

.carousel-dot.active {
  background: var(--accent);
  width: 24px;
  border-radius: 4px;
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

@media (max-width: 960px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  box-shadow: var(--shadow-sm);
}

.skill-card-title {
  font-size: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--accent);
  font-family: var(--font-mono);
}

.skill-item-list {
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
}

.skill-item-row {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.skill-item-name-wrap {
  display: flex;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
}

.skill-item-name {
  color: var(--text-primary);
}

.skill-item-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* Experience Timeline */
.timeline-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow-sm);
}

.timeline-head-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.25rem;
}

.timeline-role {
  font-size: 1.05rem;
  font-weight: 700;
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
}

.timeline-org {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.exp-social-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 0.22rem 0.65rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--transition);
}

.exp-social-btn svg {
  stroke: var(--accent);
  transition: stroke var(--transition);
}

.exp-social-btn:hover {
  transform: translateY(-1px);
}

.exp-btn-instagram:hover {
  background: #E1306C;
  border-color: #E1306C;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(225, 48, 108, 0.35);
}

.exp-btn-instagram:hover svg {
  stroke: #ffffff;
}

.exp-btn-youtube svg {
  color: #FF0000;
  fill: #FF0000;
  transition: all var(--transition);
}

.exp-btn-youtube:hover {
  background: #FF0000;
  border-color: #FF0000;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(255, 0, 0, 0.35);
}

.exp-btn-youtube:hover svg {
  color: #ffffff;
  fill: #ffffff;
}

.timeline-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.timeline-list li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  position: relative;
  padding-left: 1.1rem;
}

.timeline-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* Case Study Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(4, 7, 13, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-window {
  width: 100%;
  max-width: 900px;
  max-height: 88vh;
  background: var(--bg-secondary);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-xl);
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  position: relative;
  display: flex;
  flex-direction: column;
  transform: scale(0.97);
  transition: transform var(--transition);
}

/* Dedicated Resume PDF Modal Window */
.resume-modal-window {
  width: 100%;
  max-width: 960px;
  height: 90vh;
  max-height: 90vh;
  background: var(--bg-secondary);
  border: 1.5px solid var(--border-active);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.97);
  transition: transform var(--transition);
}

.modal-backdrop.open .resume-modal-window {
  transform: scale(1);
}

.resume-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.15rem 1.75rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
}

.resume-modal-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-right: 2.25rem;
}

.resume-pdf-frame {
  width: 100%;
  flex: 1;
  border: none;
  background: #2b2b2b;
}

.modal-backdrop.open .modal-window {
  transform: scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition);
}

.modal-close-btn:hover {
  background: var(--brand-red);
  color: #ffffff;
  border-color: var(--brand-red);
}

.modal-header {
  padding: 1.5rem 2rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-tabs {
  display: flex;
  overflow-x: auto;
  padding: 0 2rem;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  gap: 1rem;
}

.modal-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.75rem 0;
  cursor: pointer;
  position: relative;
  white-space: nowrap;
  transition: color var(--transition);
}

.modal-tab-btn:hover {
  color: var(--text-primary);
}

.modal-tab-btn.active {
  color: var(--accent);
  font-weight: 600;
}

.modal-tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
}

.modal-content-body {
  padding: 1.75rem 2rem;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Embedded 3D CAD Viewer Stage inside Modal */
.modal-cad-stage-wrap {
  width: 100%;
  height: 380px;
  background: #060911;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  margin: 1.25rem 0;
}

#modal-cad-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.modal-cad-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.cad-control-pill {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}

.cad-control-pill:hover,
.cad-control-pill.active {
  border-color: var(--accent);
  color: var(--accent);
}

/* BOM Table */
.bom-table-wrap {
  overflow-x: auto;
  margin: 1.25rem 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.bom-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.bom-table th,
.bom-table td {
  padding: 0.65rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.bom-table th {
  background: var(--bg-tertiary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  text-transform: uppercase;
}

/* Contact Section */
.contact-grid {
  display: flex;
  justify-content: center;
  align-items: center;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2.25rem 2.5rem;
  box-shadow: var(--shadow-sm);
  width: 100%;
  max-width: 580px;
}

.email-copy-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.15rem;
  cursor: pointer;
  margin-bottom: 1.25rem;
  transition: all var(--transition);
  user-select: none;
}

.email-copy-pill:hover {
  border-color: var(--accent);
}

.email-copy-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}

.email-copy-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  white-space: nowrap;
  letter-spacing: 0.05em;
  margin-bottom: 0.15rem;
}

.email-copy-address {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(0.78rem, 1.2vw, 0.92rem);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-primary);
}

.email-copy-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-top: 0.2rem;
  white-space: nowrap;
}

.copy-hint {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  white-space: nowrap;
  flex-shrink: 0;
}

.social-links-row {
  display: flex;
  gap: 0.75rem;
}

.social-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  transition: all var(--transition);
}

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

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  outline: none;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Responsive */
@media (max-width: 860px) {
  .nav-desktop,
  .nav-resume-desktop,
  .desktop-theme-btn {
    display: none !important;
  }
  .nav-hamburger-btn {
    display: flex;
  }
  .mobile-nav-drawer {
    display: block;
  }
  .hero-split-grid {
    grid-template-columns: 1fr;
    gap: 2.25rem;
  }
  .carousel-card {
    flex: 0 0 88vw;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .modal-header,
  .modal-tabs,
  .modal-content-body {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
}