/* ============================================
   POWER SHOWCASE — Mohammad Alenezi
   Design System & Complete Styles
   ============================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #0f0f18;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-hover: rgba(255, 255, 255, 0.15);

  --text-primary: #e8e8ed;
  --text-secondary: rgba(232, 232, 237, 0.6);
  --text-muted: rgba(232, 232, 237, 0.35);

  --accent: #00f0ff;
  --accent-glow: rgba(0, 240, 255, 0.15);
  --accent-glow-strong: rgba(0, 240, 255, 0.3);
  --accent-dim: rgba(0, 240, 255, 0.6);

  --success: #00e676;
  --warning: #ffab40;
  --idle: #78909c;

  /* Typography */
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Spacing */
  --section-padding: 120px 0;
  --container-max: 1200px;
  --radius: 24px;
  --radius-sm: 14px;
  --radius-xs: 8px;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 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;
  }

  .hero-bg-gradient {
    animation: none !important;
  }

  .typing-cursor {
    animation: none !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  .pulse-dot {
    animation: none !important;
  }
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a:hover {
  color: #fff;
}

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

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
}

section {
  padding: var(--section-padding);
  position: relative;
}

/* ---------- Typography ---------- */
h1,
h2,
h3,
h4,
h5 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

.section-title {
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-dim));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin-bottom: 56px;
}

/* ---------- Scroll Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

.reveal-delay-1 {
  transition-delay: 0.1s;
}

.reveal-delay-2 {
  transition-delay: 0.2s;
}

.reveal-delay-3 {
  transition-delay: 0.3s;
}

.reveal-delay-4 {
  transition-delay: 0.4s;
}

.reveal-delay-5 {
  transition-delay: 0.5s;
}

.reveal-delay-6 {
  transition-delay: 0.6s;
}

/* ---------- Glass Card ---------- */
.glass-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 32px;
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth), background var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), var(--accent-glow), transparent 40%);
  opacity: 0;
  transition: opacity var(--transition-smooth);
  pointer-events: none;
  z-index: 0;
}

.glass-card:hover {
  border-color: var(--border-glass-hover);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.glass-card:hover::before {
  opacity: 1;
}

.glass-card>* {
  position: relative;
  z-index: 1;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 14px 28px;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-smooth);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #0a0a0f;
  box-shadow: 0 0 24px var(--accent-glow);
}

.btn-primary:hover {
  background: #fff;
  color: #0a0a0f;
  box-shadow: 0 0 40px var(--accent-glow-strong);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 10px 20px;
}

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

/* ---------- Chips / Tags ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 100px;
  background: rgba(0, 240, 255, 0.06);
  border: 1px solid rgba(0, 240, 255, 0.12);
  color: var(--accent);
  transition: all var(--transition-fast);
}

.chip:hover {
  background: rgba(0, 240, 255, 0.12);
  border-color: rgba(0, 240, 255, 0.25);
}

.chip-neutral {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--border-glass);
  color: var(--text-secondary);
}

.chip-neutral:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
}

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

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(0, 230, 118, 0.4);
  }

  50% {
    opacity: 0.7;
    box-shadow: 0 0 0 6px rgba(0, 230, 118, 0);
  }
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: background var(--transition-smooth), padding var(--transition-smooth), backdrop-filter var(--transition-smooth);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 10px 0;
  border-bottom: 1px solid var(--border-glass);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-logo .logo-bracket {
  color: var(--accent);
  font-weight: 400;
  opacity: 0.7;
}

.nav-logo .logo-dot {
  color: var(--accent);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
}

.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 100px;
  transition: all var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   HERO SECTION
   ============================================ */
#home {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 100px;
  overflow: hidden;
}

.hero-bg-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0, 240, 255, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(100, 50, 255, 0.04) 0%, transparent 50%);
  animation: heroShift 12s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes heroShift {
  0% {
    opacity: 0.8;
    transform: scale(1);
  }

  100% {
    opacity: 1;
    transform: scale(1.05);
  }
}

.hero-noise {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  opacity: 0.4;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-content h1 {
  margin-bottom: 20px;
}

.hero-content h1 .accent {
  color: var(--accent);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 600px;
}

.typing-line {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 36px;
  min-height: 32px;
}

.typing-cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: var(--accent);
  animation: blink 1s step-end infinite;
  margin-left: 2px;
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}

.hero-chips {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ============================================
   METRICS STRIP
   ============================================ */
#metrics {
  padding: 80px 0;
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.metric-card {
  text-align: center;
  padding: 28px 20px;
}

.metric-card .metric-icon {
  font-size: 1.8rem;
  margin-bottom: 14px;
  display: block;
}

.metric-card .metric-label {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.metric-card .metric-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ============================================
   PROJECTS
   ============================================ */
.project-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 40px;
}

.filter-btn {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 8px 20px;
  border-radius: 100px;
  border: 1px solid var(--border-glass);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0, 240, 255, 0.06);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.project-card {
  transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
  cursor: pointer;
}

.project-card .project-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.project-card .project-block {
  margin-bottom: 12px;
}

.project-card .project-block-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 4px;
}

.project-card .project-block-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.project-card .project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
}

.project-card .project-tags .chip {
  font-size: 0.72rem;
  padding: 4px 10px;
}

.project-info-btn {
  margin-top: 18px;
  width: 100%;
  justify-content: center;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.82rem;
}

/* ============================================
   PROJECT MODAL
   ============================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-smooth);
  padding: 24px;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 48px;
  max-width: 640px;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  transform: translateY(24px) scale(0.97);
  transition: transform var(--transition-smooth);
  position: relative;
}

.modal-overlay.active .modal-content {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-glass);
  background: transparent;
  color: var(--text-secondary);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.modal-content h3 {
  font-size: 1.4rem;
  margin-bottom: 24px;
}

.modal-section {
  margin-bottom: 24px;
}

.modal-section h4 {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 10px;
}

.modal-section p,
.modal-section li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.modal-section ul {
  list-style: none;
  padding: 0;
}

.modal-section ul li::before {
  content: '→ ';
  color: var(--accent);
}

.modal-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

/* ============================================
   SKILLS
   ============================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.skill-column h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.skill-column .skill-column-sub {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

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

.how-i-work {
  border-top: 1px solid var(--border-glass);
  padding-top: 40px;
}

.how-i-work h3 {
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.how-i-work .work-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.work-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.work-chip:hover {
  border-color: var(--accent);
  background: rgba(0, 240, 255, 0.04);
}

.work-chip .work-icon {
  font-size: 1.1rem;
}

/* ============================================
   RESEARCH
   ============================================ */
.research-main-card {
  margin-bottom: 48px;
}

.research-main-card .research-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  padding: 6px 14px;
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 100px;
  margin-bottom: 20px;
}

.research-main-card h3 {
  font-size: 1.3rem;
  margin-bottom: 16px;
  line-height: 1.4;
}

.research-detail {
  display: flex;
  gap: 32px;
  margin-top: 20px;
}

.research-detail-item .detail-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 4px;
}

.research-detail-item .detail-value {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.research-blocks {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 56px;
}

.research-block {
  padding: 24px;
}

.research-block h4 {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.research-block p,
.research-block li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.research-block ul {
  list-style: none;
  padding: 0;
}

.research-block ul li::before {
  content: '• ';
  color: var(--accent);
}

/* Research Timeline */
.research-timeline {
  position: relative;
  padding-left: 40px;
}

.research-timeline::before {
  content: '';
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-glass);
}

.research-timeline .timeline-line-fill {
  position: absolute;
  left: 14px;
  top: 0;
  width: 2px;
  height: 0;
  background: linear-gradient(180deg, var(--accent), rgba(0, 240, 255, 0.2));
  transition: height 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.timeline-item {
  position: relative;
  padding-bottom: 36px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -33px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--border-glass);
  background: var(--bg-primary);
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth);
  z-index: 1;
}

.timeline-item.active::before {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

.timeline-item .timeline-phase {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 4px;
}

.timeline-item .timeline-label {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
}

/* ============================================
   DASHBOARD
   ============================================ */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.dashboard-widget {
  padding: 28px;
}

.dashboard-widget .widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.dashboard-widget .widget-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.widget-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 100px;
}

.widget-status.online {
  background: rgba(0, 230, 118, 0.1);
  color: var(--success);
  border: 1px solid rgba(0, 230, 118, 0.2);
}

.widget-status.active {
  background: rgba(0, 240, 255, 0.1);
  color: var(--accent);
  border: 1px solid rgba(0, 240, 255, 0.2);
}

.widget-status.idle {
  background: rgba(120, 144, 156, 0.1);
  color: var(--idle);
  border: 1px solid rgba(120, 144, 156, 0.2);
}

.widget-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.widget-body .widget-items {
  list-style: none;
  padding: 0;
}

.widget-body .widget-items li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  display: flex;
  align-items: center;
  gap: 8px;
}

.widget-body .widget-items li:last-child {
  border-bottom: none;
}

.widget-body .widget-items li .item-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.manual-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-top: 12px;
}

/* Skeleton loading effect */
.skeleton {
  background: linear-gradient(90deg, var(--bg-glass) 25%, rgba(255, 255, 255, 0.06) 50%, var(--bg-glass) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-xs);
  height: 14px;
  margin-bottom: 8px;
}

.skeleton.w-60 {
  width: 60%;
}

.skeleton.w-80 {
  width: 80%;
}

.skeleton.w-40 {
  width: 40%;
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }

  100% {
    background-position: -200% 0;
  }
}

/* ============================================
   RESUME
   ============================================ */
.resume-ctas {
  display: flex;
  gap: 12px;
  margin-bottom: 48px;
}

.resume-timeline {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.accordion-item {
  border-radius: var(--radius);
  overflow: hidden;
}

.accordion-item .glass-card {
  border-radius: var(--radius);
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  padding: 0;
}

.accordion-header .accordion-icon {
  font-size: 1.2rem;
  transition: transform var(--transition-fast);
  color: var(--text-secondary);
}

.accordion-item.open .accordion-icon {
  transform: rotate(180deg);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth), padding var(--transition-smooth);
}

.accordion-item.open .accordion-body {
  max-height: 600px;
  padding-top: 20px;
}

.accordion-body ul {
  list-style: none;
  padding: 0;
}

.accordion-body ul li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.accordion-body ul li:last-child {
  border-bottom: none;
}

.accordion-body ul li::before {
  content: '›';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ============================================
   CONTACT
   ============================================ */
#contact {
  border-top: 1px solid var(--border-glass);
}

.contact-links {
  display: flex;
  gap: 12px;
  margin-bottom: 48px;
}

.contact-form {
  max-width: 560px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--text-primary);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

/* Success modal */
.success-modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  padding: 48px;
  text-align: center;
  z-index: 3000;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-smooth);
}

.success-modal.active {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, -50%) scale(1);
}

.success-modal .success-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.success-modal h3 {
  margin-bottom: 8px;
}

.success-modal p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

.success-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 2999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-smooth);
}

.success-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  padding: 80px 0 40px;
  border-top: 1px solid var(--border-glass);
  text-align: center;
}

.footer-brand {
  margin-bottom: 40px;
}

.footer-name {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  background: linear-gradient(135deg, var(--text-primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
  letter-spacing: -0.03em;
}

.footer-tagline {
  font-size: 1rem;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}

.footer-tagline span {
  color: var(--accent);
  font-weight: 600;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 100px;
  transition: all var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent);
  background: rgba(0, 240, 255, 0.05);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-tech {
  display: flex;
  gap: 6px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }

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

  .research-blocks {
    grid-template-columns: 1fr;
  }

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

  .research-detail {
    flex-direction: column;
    gap: 16px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 80px 0;
  }

  .container {
    padding: 0 20px;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-glass);
    flex-direction: column;
    padding: 100px 32px 32px;
    gap: 4px;
    transition: right var(--transition-smooth);
    z-index: 999;
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    font-size: 1rem;
    padding: 14px 16px;
  }

  .mobile-menu-btn {
    display: flex;
  }

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

  .hero-ctas {
    flex-direction: column;
  }

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

  .contact-links {
    flex-direction: column;
  }

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

  .resume-ctas {
    flex-direction: column;
  }

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

  .modal-content {
    padding: 32px 24px;
  }
}

@media (max-width: 480px) {
  .metrics-grid {
    grid-template-columns: 1fr;
  }

  .hero-chips {
    gap: 8px;
  }

  .work-chips {
    flex-direction: column;
  }
}