/* ==========================================================================
   FASEEH UL HASSAN - 2026 ENTERPRISE TECHNOLOGY PORTFOLIO DESIGN SYSTEM
   Healthcare IT • Laboratory Information Systems • Infrastructure
   ========================================================================== */

:root {
  color-scheme: dark;
  --font-display: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-body: 'Manrope', system-ui, -apple-system, sans-serif;

  /* 2026 Obsidian & Emerald Palette (Dark Mode Default) */
  --bg: #060a0d;
  --bg-gradient: radial-gradient(circle at 50% 0%, #0d1720 0%, #060a0d 80%);
  --surface: #0b1217;
  --surface-alt: #101b24;
  --bg-glass: rgba(11, 18, 23, 0.78);
  --bg-card: rgba(16, 26, 34, 0.65);
  --bg-card-hover: rgba(22, 36, 48, 0.85);
  
  --text: #f3f7fa;
  --text-muted: #8ba2b5;
  --text-sub: #546b7d;
  
  --line: rgba(255, 255, 255, 0.08);
  --line-medium: rgba(255, 255, 255, 0.15);
  --line-highlight: rgba(16, 185, 129, 0.4);
  
  --accent: #10b981;
  --accent-cyan: #06b6d4;
  --accent-soft: rgba(16, 185, 129, 0.12);
  --accent-glow: rgba(16, 185, 129, 0.25);
  --button-text: #060a0d;
  
  --grad-accent: linear-gradient(135deg, #10b981 0%, #06b6d4 50%, #38bdf8 100%);
  --grad-card: linear-gradient(180deg, rgba(16, 185, 129, 0.04) 0%, rgba(11, 18, 23, 0.8) 100%);
  
  --radius: 20px;
  --small-radius: 10px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-card: 0 20px 45px -12px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 0 35px rgba(16, 185, 129, 0.18);
  
  --transition-fast: 0.18s ease;
  --transition-normal: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

:root[data-theme='light'] {
  color-scheme: light;
  
  --bg: #f8fafc;
  --bg-gradient: radial-gradient(circle at 50% 0%, #eef2f6 0%, #f8fafc 80%);
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.86);
  --bg-card: rgba(255, 255, 255, 0.8);
  --bg-card-hover: #ffffff;
  
  --text: #0f172a;
  --text-muted: #475569;
  --text-sub: #64748b;
  
  --line: rgba(15, 23, 42, 0.08);
  --line-medium: rgba(15, 23, 42, 0.14);
  --line-highlight: rgba(5, 150, 105, 0.4);
  
  --accent: #059669;
  --accent-cyan: #0891b2;
  --accent-soft: rgba(5, 150, 105, 0.08);
  --accent-glow: rgba(5, 150, 105, 0.12);
  --button-text: #ffffff;
  
  --grad-accent: linear-gradient(135deg, #059669 0%, #0891b2 50%, #0284c7 100%);
  --grad-card: linear-gradient(180deg, rgba(255, 255, 255, 0.9) 0%, rgba(241, 245, 249, 0.9) 100%);
  
  --shadow-sm: 0 4px 16px rgba(15, 23, 42, 0.04);
  --shadow-card: 0 16px 36px -8px rgba(15, 23, 42, 0.08);
  --shadow-glow: 0 0 35px rgba(5, 150, 105, 0.1);
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  margin: 0;
  background-color: var(--bg);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.75;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Ambient Background Glows */
.ambient-glow {
  position: absolute;
  width: 650px;
  height: 650px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(140px);
  opacity: 0.45;
}
.glow-1 {
  top: -150px;
  left: 20%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
}
.glow-2 {
  top: 45%;
  right: 5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
}

::selection {
  background: var(--accent);
  color: var(--button-text);
}

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

button, input {
  font: inherit;
  color: inherit;
}

button, summary {
  -webkit-tap-highlight-color: transparent;
  cursor: pointer;
  border: none;
  background: none;
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.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;
}

.skip-link {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 1000;
  padding: 12px 24px;
  background: var(--accent);
  color: var(--button-text);
  font-weight: 700;
  border-radius: var(--small-radius);
  transform: translateY(-200%);
  transition: transform var(--transition-normal);
}
.skip-link:focus {
  transform: translateY(0);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.16;
  color: var(--text);
  margin: 0;
}

p {
  margin: 0 0 20px;
}

.section-shell {
  width: min(1200px, calc(100% - 64px));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

section[id] {
  padding-top: 120px;
}

/* Gradient text accents */
.gradient-text {
  background: var(--grad-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

/* ==========================================================================
   BUTTONS & BADGES
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 12px 26px;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: var(--small-radius);
  border: 1px solid transparent;
  transition: all var(--transition-normal);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-arrow {
  font-size: 1.1rem;
  transition: transform var(--transition-fast);
}
.btn:hover .btn-arrow {
  transform: translate(2px, -2px);
}

.btn-primary {
  background: var(--accent);
  color: var(--button-text);
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.28);
}
.btn-primary:hover {
  background: #34d399;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(16, 185, 129, 0.45);
}

.btn-secondary {
  background: var(--surface-alt);
  color: var(--text);
  border-color: var(--line-medium);
  backdrop-filter: blur(12px);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-sm {
  min-height: 38px;
  padding: 8px 18px;
  font-size: 0.8125rem;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 6px;
  background: var(--surface-alt);
  border: 1px solid var(--line);
  color: var(--text-muted);
  transition: all var(--transition-fast);
}
.badge-tag:hover {
  border-color: var(--line-highlight);
  background: var(--bg-card-hover);
  color: var(--text);
  transform: translateY(-1px);
}

/* ==========================================================================
   SITE HEADER & NAVIGATION
   ========================================================================== */

.site-header {
  position: sticky;
  top: 14px;
  z-index: 100;
  width: min(1280px, calc(100% - 32px));
  height: 72px;
  margin: 14px auto 0;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-monogram {
  width: 40px;
  height: 40px;
  border-radius: var(--small-radius);
  background: var(--grad-accent);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: #060a0d;
  box-shadow: 0 0 18px var(--accent-glow);
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.015em;
}

.brand-role {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-cyan);
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  padding: 8px 14px;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--small-radius);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--text);
  background: var(--surface-alt);
}

.nav-link.active, .nav-link[aria-current='location'] {
  color: var(--accent);
  background: var(--accent-soft);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--small-radius);
  background: var(--surface-alt);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  color: var(--text-muted);
  transition: all var(--transition-fast);
}
.theme-toggle-btn:hover {
  color: var(--accent);
  border-color: var(--line-highlight);
  background: var(--bg-card-hover);
}

.theme-icon-sun, .theme-icon-moon {
  width: 18px;
  height: 18px;
}
:root[data-theme='dark'] .theme-icon-sun { display: block; }
:root[data-theme='dark'] .theme-icon-moon { display: none; }
:root[data-theme='light'] .theme-icon-sun { display: none; }
:root[data-theme='light'] .theme-icon-moon { display: block; }

.menu-toggle-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--small-radius);
  background: var(--surface-alt);
  border: 1px solid var(--line);
  align-items: center;
  justify-content: center;
  color: var(--text);
}

/* Mobile Nav Drawer */
.mobile-nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 998;
  background: rgba(6, 10, 13, 0.85);
  backdrop-filter: blur(16px);
  display: none;
  opacity: 0;
  transition: opacity var(--transition-normal);
}
.mobile-nav-overlay.open {
  display: block;
  opacity: 1;
}

.mobile-nav-panel {
  position: fixed;
  top: 96px;
  right: 16px;
  left: 16px;
  max-width: 480px;
  margin-inline: auto;
  z-index: 999;
  background: var(--surface);
  border: 1px solid var(--line-medium);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transform: translateY(-20px);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
}
.mobile-nav-panel.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--small-radius);
  transition: all var(--transition-fast);
}
.mobile-nav-link:hover, .mobile-nav-link.active {
  color: var(--accent);
  background: var(--surface-alt);
}

/* ==========================================================================
   1. HERO SECTION & PROMINENT NAME HEADING
   ========================================================================== */

.hero-section {
  min-height: calc(100vh - 140px);
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 40px;
  padding-bottom: 70px;
  overflow: hidden;
}

#hero-network-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.6;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 960px;
}

.eyebrow-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--accent-soft);
  border: 1px solid var(--line-highlight);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  animation: pulseNode 2s infinite ease-in-out;
}

@keyframes pulseNode {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.5; }
}

.hero-name-block {
  margin-bottom: 20px;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(3.8rem, 8.5vw, 6.4rem);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.06em;
  color: var(--text);
  margin: 0;
}

.hero-summary {
  font-size: clamp(1.15rem, 1.4vw, 1.35rem);
  line-height: 1.75;
  color: var(--text-muted);
  max-width: 700px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 52px;
}

/* Metrics Grid Strip */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  padding: 26px 28px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.metric-item {
  display: flex;
  flex-direction: column;
  padding: 4px 16px;
  border-right: 1px solid var(--line);
}
.metric-item:last-child {
  border-right: none;
}

.metric-val {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.metric-val .accent-mark {
  color: var(--accent);
}

.metric-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 6px;
  line-height: 1.4;
}

/* ==========================================================================
   2. ABOUT SECTION
   ========================================================================== */

.section-heading {
  margin-bottom: 40px;
  max-width: 750px;
}

.section-heading h2 {
  font-size: clamp(2.2rem, 3.8vw, 3.2rem);
  letter-spacing: -0.04em;
  text-wrap: balance;
}

.section-kicker {
  display: block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.split-section {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 70px;
  align-items: start;
}

.about-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.about-sidebar .section-heading {
  margin-bottom: 0;
  max-width: 360px;
}

.about-photo-wrapper {
  position: relative;
  width: 100%;
  max-width: 340px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-highlight);
  background: var(--bg-card);
  box-shadow: var(--shadow-card), 0 0 28px var(--accent-glow);
  aspect-ratio: 4 / 5;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.about-photo-wrapper:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), 0 0 38px rgba(16, 185, 129, 0.35);
  border-color: var(--accent);
}

.about-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  display: block;
  transition: transform var(--transition-smooth);
}

.about-photo-wrapper:hover .about-photo {
  transform: scale(1.03);
}

.about-photo-backdrop {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 65%, rgba(6, 10, 13, 0.6) 100%);
  pointer-events: none;
}

:root[data-theme='light'] .about-photo-backdrop {
  background: linear-gradient(180deg, transparent 70%, rgba(15, 23, 42, 0.25) 100%);
}

.about-content {
  color: var(--text-muted);
}

.role-intro {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 14px;
}

.about-content .lead {
  color: var(--text);
  font-size: 1.25rem;
  line-height: 1.7;
}

.hero-focus {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 38px;
}

.value-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.value-card {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all var(--transition-normal);
}
.value-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--line-highlight);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.value-icon-box {
  width: 42px;
  height: 42px;
  border-radius: var(--small-radius);
  background: var(--accent-soft);
  border: 1px solid var(--line-highlight);
  display: grid;
  place-items: center;
  color: var(--accent);
  margin-bottom: 14px;
}

.value-card h3 {
  font-size: 1.0625rem;
  color: var(--text);
  margin-bottom: 8px;
}

.value-card p {
  font-size: 0.8125rem;
  margin: 0;
  color: var(--text-muted);
}

/* ==========================================================================
   3. EXPERTISE SECTION
   ========================================================================== */

.expertise-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.expertise-card {
  display: grid;
  grid-template-columns: 52px 1fr;
  column-gap: 24px;
  padding: 32px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.expertise-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad-accent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.expertise-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--line-highlight);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.expertise-card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-medium);
  border-radius: var(--small-radius);
  background: var(--surface-alt);
  color: var(--accent);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.875rem;
  box-shadow: 0 0 14px var(--accent-soft);
}

.expertise-card h3 {
  font-size: 1.4rem;
  letter-spacing: -0.03em;
  margin-bottom: 10px;
}

.expertise-card p {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.75;
  margin-bottom: 18px;
}

.tag-list {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* ==========================================================================
   4. EXPERIENCE SECTION
   ========================================================================== */

.experience-layout {
  display: grid;
  grid-template-columns: 1.65fr 1fr;
  gap: 48px;
  border-top: 1px solid var(--line);
  padding-top: 44px;
}

.experience-main {
  padding: 36px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--line-highlight);
  border-radius: var(--radius);
  box-shadow: var(--shadow-glow);
}

.role-header {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 18px;
}

.company {
  display: block;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.role-header h3 {
  font-size: 1.8rem;
  letter-spacing: -0.035em;
}

.role-badge {
  display: inline-block;
  flex-shrink: 0;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  border: 1px solid var(--line-highlight);
}

.role-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.achievement-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 28px;
}

.achievement-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.check-icon {
  width: 18px;
  height: 18px;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.experience-side {
  align-self: start;
  padding: 34px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  backdrop-filter: blur(16px);
}

.experience-side h3 {
  font-size: 1.45rem;
  letter-spacing: -0.03em;
  margin-bottom: 14px;
}

.experience-side p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.experience-side h4 {
  font-size: 0.9375rem;
  margin-bottom: 10px;
  color: var(--accent-cyan);
}

.mini-divider {
  height: 1px;
  background: var(--line);
  margin-block: 22px;
}

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

/* ==========================================================================
   5. INFRASTRUCTURE SECTION
   ========================================================================== */

.infrastructure-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 48px;
}

.infra-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 24px;
  transition: all var(--transition-normal);
}
.infra-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--line-highlight);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.infra-card h3 {
  font-size: 1.3rem;
  letter-spacing: -0.03em;
  grid-column: 1 / -1;
}

.infra-card p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin: 0;
}

.infra-card ul {
  margin: 0;
  padding: 0 0 0 16px;
  color: var(--text-muted);
  font-size: 0.75rem;
}

.infra-card li {
  margin-bottom: 6px;
}

.infra-card li::marker {
  color: var(--accent);
}

/* ==========================================================================
   6. CREDENTIALS & EDUCATION SECTION
   ========================================================================== */

.education-panel {
  padding: 34px;
  border: 1px solid var(--line);
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
}

.panel-label {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.education-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.education-card {
  border-left: 2px solid var(--accent-cyan);
  padding-left: 20px;
}

.education-card:first-child {
  border-left: 2px solid var(--accent);
  padding-left: 20px;
}

.education-card h3 {
  font-size: 1.0625rem;
  margin-bottom: 8px;
}

.education-card p {
  font-size: 0.75rem;
  margin: 0;
  color: var(--text-muted);
}

.certification-heading {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 24px;
  justify-content: space-between;
  align-items: center;
}

.certification-heading h3 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  letter-spacing: -0.04em;
}

.certification-heading p {
  margin: 6px 0 0;
  max-width: 560px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.cert-count {
  flex-shrink: 0;
  padding: 6px 16px;
  border: 1px solid var(--line-highlight);
  border-radius: var(--radius-full);
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
}

.credential-tools {
  margin: 24px 0 12px;
  padding: 14px 0;
  border-block: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

.credential-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.filter-button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--small-radius);
  padding: 6px 14px;
  background: var(--surface-alt);
  color: var(--text-muted);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  transition: all var(--transition-fast);
}

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

.filter-button.active {
  background: var(--accent);
  color: var(--button-text);
  border-color: var(--accent);
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.credential-search {
  flex: 1;
  max-width: 320px;
  min-width: 220px;
  position: relative;
}

.search-svg-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-sub);
  pointer-events: none;
}

.credential-search input {
  min-height: 40px;
  width: 100%;
  padding: 8px 14px 8px 36px;
  border: 1px solid var(--line-medium);
  border-radius: var(--small-radius);
  background: var(--surface);
  color: var(--text);
  font-size: 0.8125rem;
  transition: all var(--transition-fast);
}
.credential-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.credential-status {
  color: var(--accent-cyan);
  font-size: 0.75rem;
  font-weight: 600;
  margin: 0 0 16px;
}

.certification-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 20px;
}

.cert-group {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.cert-group:hover {
  border-color: var(--line-highlight);
}

.cert-group-head {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 24px;
  cursor: pointer;
  min-height: 74px;
  user-select: none;
  transition: background var(--transition-fast);
}
.cert-group-head::-webkit-details-marker {
  display: none;
}
.cert-group-head:hover {
  background: var(--surface-alt);
}

.cert-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--line-highlight);
  border-radius: var(--small-radius);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.75rem;
}

.cert-group-head > div {
  flex: 1;
}

.cert-group small {
  display: block;
  color: var(--text-sub);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 2px;
}

.cert-group h3 {
  font-size: 1.125rem;
  line-height: 1.35;
}

.group-count {
  display: grid;
  place-items: center;
  flex-shrink: 0;
  min-width: 24px;
  height: 24px;
  border-radius: 6px;
  background: var(--surface-alt);
  color: var(--accent-cyan);
  font-size: 0.6875rem;
  font-weight: 700;
}

.disclosure-mark {
  flex-shrink: 0;
  width: 14px;
  color: var(--accent);
  font-size: 0;
}
.disclosure-mark::before {
  content: '+';
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
}
.cert-group[open] .disclosure-mark::before {
  content: '−';
}

.cert-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 36px;
  padding: 8px 24px 20px;
  border-top: 1px solid var(--line);
}

.cert-list > div {
  align-self: start;
  position: relative;
  color: var(--text-muted);
  font-size: 0.8125rem;
  padding: 10px 0 10px 18px;
  line-height: 1.6;
}

.cert-list > div::before {
  content: '';
  position: absolute;
  left: 0;
  top: 18px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.cert-list > div:only-child {
  grid-column: 1 / -1;
}

.credential-empty {
  padding: 32px;
  text-align: center;
  background: var(--surface-alt);
  border-radius: var(--small-radius);
  color: var(--text-muted);
  margin-top: 16px;
}

/* ==========================================================================
   7. CONTACT SECTION
   ========================================================================== */

.contact-section {
  padding-bottom: 90px;
}

.contact-card {
  padding: 60px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--line-highlight);
  border-radius: var(--radius);
  box-shadow: var(--shadow-glow);
}

.contact-card h2 {
  max-width: 650px;
  font-size: clamp(2.4rem, 4.2vw, 3.6rem);
  letter-spacing: -0.05em;
  margin-bottom: 20px;
  text-wrap: balance;
}

.contact-card > p {
  color: var(--text-muted);
  max-width: 580px;
  font-size: 0.9375rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-bottom: 28px;
}

.hero-meta span:first-child {
  color: var(--accent);
  font-weight: 800;
}

.email-copy-wrapper {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.email-display {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.2vw, 1.875rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

/* Toast */
.toast-notice {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1100;
  padding: 12px 20px;
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: var(--small-radius);
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  box-shadow: var(--shadow-card);
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-normal);
}
.toast-notice.show {
  transform: translateY(0);
  opacity: 1;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.site-footer {
  display: flex;
  gap: 20px;
  justify-content: space-between;
  padding-block: 28px;
  border-top: 1px solid var(--line);
  color: var(--text-muted);
  font-size: 0.75rem;
}

.site-footer span:first-child {
  font-weight: 800;
  color: var(--text);
}

/* ==========================================================================
   SCROLL REVEAL & MOTION
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

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

.delay-1 { transition-delay: 0.08s; }
.delay-2 { transition-delay: 0.16s; }
.delay-3 { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
  #hero-network-canvas {
    display: none;
  }
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES
   ========================================================================== */

@media (max-width: 1100px) {
  .desktop-nav { gap: 14px; font-size: 0.75rem; }
  .brand-role { display: none; }
  .split-section { gap: 48px; }
  .experience-layout { gap: 30px; }
  .role-header { flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
  .role-header h3 { margin-bottom: 4px; }
}

@media (max-width: 768px) {
  .section-shell { width: calc(100% - 36px); }
  .site-header { width: calc(100% - 24px); height: 64px; margin-top: 8px; top: 8px; padding-inline: 14px; }
  .nav-desktop { display: none; }
  .menu-toggle-btn { display: inline-flex; }
  .hero-section { min-height: auto; padding-top: 24px; padding-bottom: 50px; }
  .hero-name { font-size: clamp(3rem, 12vw, 4.4rem); }
  .hero-summary { font-size: 1rem; }
  .metrics-grid { grid-template-columns: 1fr 1fr; padding: 16px; }
  .metric-item { padding: 12px 10px; }
  .metric-item:nth-child(2) { border-right: none; }
  .metric-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .metric-val { font-size: 2rem; }
  section[id] { padding-top: 72px; }
  .split-section, .expertise-grid, .experience-layout, .infrastructure-grid, .certification-grid { grid-template-columns: 1fr; }
  .split-section { gap: 0; }
  .about-sidebar { margin-bottom: 36px; }
  .about-photo-wrapper { max-width: 300px; }
  .achievement-list { grid-template-columns: 1fr; }
  .education-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .education-card:nth-child(3) { border-left: 2px solid var(--accent-cyan); padding-left: 20px; }
  .certification-heading { align-items: start; flex-direction: column; gap: 10px; }
  .credential-tools { align-items: stretch; gap: 14px; }
  .credential-search { max-width: none; }
  .cert-list { grid-template-columns: 1fr; padding: 6px 16px 16px; gap: 0; }
  .contact-card { padding: 36px 24px; }
  .site-footer { flex-direction: column; gap: 6px; }
}

@media (max-width: 480px) {
  .education-grid, .infra-card, .value-grid { grid-template-columns: 1fr; }
  .expertise-card { grid-template-columns: 1fr; gap: 14px; }
}

@media print {
  .site-header, .hero-actions, .credential-tools, .theme-toggle-btn, .menu-toggle-btn, .ambient-glow {
    display: none !important;
  }
  .section-shell { width: 100%; }
  .reveal { opacity: 1 !important; transform: none !important; }
}