/* ============================================
   K. M. Mehedi — Portfolio
   Premium Dark Theme with Gold Accents
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-tertiary: #16161f;
  --bg-card: #1a1a25;
  --bg-card-hover: #1f1f2e;
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b5;
  --text-muted: #6b6b80;
  --accent: #d4a853;
  --accent-light: #f0c674;
  --accent-dark: #b08930;
  --accent-glow: rgba(212, 168, 83, 0.15);
  --accent-glow-strong: rgba(212, 168, 83, 0.3);
  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(212, 168, 83, 0.2);
  --gradient-accent: linear-gradient(135deg, #d4a853, #f0c674);
  --gradient-dark: linear-gradient(180deg, #0a0a0f, #111118);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(212, 168, 83, 0.1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Playfair Display', Georgia, serif;
  --nav-height: 80px;
  --container-max: 1200px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--accent);
  color: var(--bg-primary);
}

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

ul {
  list-style: none;
}

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

/* ---------- Preloader ---------- */
#preloader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

#preloader.loaded {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader {
  position: relative;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.loader-ring {
  position: absolute;
  inset: 0;
  border: 2px solid transparent;
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: loaderSpin 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.loader-text {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 2px;
}

@keyframes loaderSpin {
  to { transform: rotate(360deg); }
}

/* ---------- Cursor Glow (desktop) ---------- */
.cursor-glow {
  position: fixed;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

@media (max-width: 768px) {
  .cursor-glow { display: none; }
}

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Navigation ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 1px;
  display: flex;
  gap: 4px;
}

.logo-text {
  color: var(--text-primary);
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  transition: var(--transition);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
  transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 20px;
}

.nav-btn {
  background: var(--gradient-accent);
  color: var(--bg-primary) !important;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 10px 20px;
}

.nav-btn::after {
  display: none;
}

.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
  z-index: 1001;
}

.bar {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active .bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .bar:nth-child(2) {
  opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--bg-primary);
  box-shadow: 0 4px 20px rgba(212, 168, 83, 0.25);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(212, 168, 83, 0.35);
}

.btn-primary i {
  transition: transform 0.3s ease;
}

.btn-primary:hover i {
  transform: translateX(4px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border);
}

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

.btn-sm {
  padding: 10px 24px;
  font-size: 0.85rem;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: calc(var(--nav-height) + 40px) 0 60px;
}

#particleCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(212, 168, 83, 0.04) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 80%, rgba(100, 80, 200, 0.03) 0%, transparent 60%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-greeting {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.hero-name {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.name-line {
  display: block;
}

.name-line.accent {
  color: var(--accent);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  min-height: 1.5em;
}

.typing-wrapper {
  display: inline;
}

.typing-cursor {
  animation: blink 1s step-end infinite;
  color: var(--accent);
  font-weight: 300;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero-subtitle {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 32px;
}

.hero-subtitle strong {
  color: var(--accent-light);
  font-weight: 600;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-social {
  display: flex;
  gap: 16px;
}

.hero-social a {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  color: var(--text-secondary);
  font-size: 1rem;
  transition: var(--transition);
}

.hero-social a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-3px);
}

/* Hero Image */
.hero-image {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.image-frame {
  position: relative;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  overflow: hidden;
}

.image-glow {
  position: absolute;
  inset: -20px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, var(--accent), transparent, var(--accent), transparent, var(--accent));
  animation: rotateGlow 8s linear infinite;
  opacity: 0.3;
}

@keyframes rotateGlow {
  to { transform: rotate(360deg); }
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  position: relative;
  z-index: 2;
}

.image-border {
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  z-index: 3;
  opacity: 0.4;
}

/* Floating Badges */
.floating-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
  z-index: 4;
  white-space: nowrap;
}

.floating-badge i {
  color: var(--accent);
  font-size: 0.9rem;
}

.badge-1 {
  top: 10%;
  right: -10%;
  animation: floatBadge 4s ease-in-out infinite;
}

.badge-2 {
  bottom: 10%;
  left: -5%;
  animation: floatBadge 4s ease-in-out infinite 1.5s;
}

@keyframes floatBadge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.scroll-arrow {
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ---------- Sections ---------- */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  padding: 6px 16px;
  background: var(--accent-glow);
  border-radius: 20px;
  border: 1px solid var(--border-accent);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-line {
  width: 60px;
  height: 3px;
  background: var(--gradient-accent);
  border-radius: 3px;
  margin: 0 auto;
}

/* ---------- About ---------- */
.about {
  background: var(--bg-secondary);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text p {
  margin-bottom: 20px;
  font-size: 1rem;
  line-height: 1.8;
}

.about-lead {
  font-size: 1.15rem !important;
  color: var(--text-primary);
  font-weight: 400;
}

.about-lead em {
  color: var(--accent);
  font-style: italic;
  font-family: var(--font-heading);
  font-size: 1.05em;
}

.about-text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.stat-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.stat-card:hover::before {
  opacity: 0.04;
}

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

.stat-icon {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 12px;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: inline;
}

.stat-suffix {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  display: inline;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ---------- Experience Timeline ---------- */
.experience {
  background: var(--bg-primary);
}

.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

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

.timeline-item {
  position: relative;
  padding-left: 48px;
  padding-bottom: 48px;
}

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

.timeline-marker {
  position: absolute;
  left: -6px;
  top: 6px;
  z-index: 2;
}

.marker-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent);
  transition: var(--transition);
}

.timeline-item:hover .marker-dot {
  background: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow-strong);
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: var(--transition);
  position: relative;
}

.timeline-content:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateX(8px);
}

.timeline-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.timeline-badge.current {
  background: rgba(34, 197, 94, 0.15);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.timeline-badge.award {
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid var(--border-accent);
}

.timeline-company h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.company-parent {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 500;
}

.timeline-location {
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 12px;
}

.timeline-role h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--accent-light);
  margin-bottom: 4px;
}

.timeline-date {
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
}

.timeline-highlights {
  margin-bottom: 16px;
}

.timeline-highlights li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.timeline-highlights li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.timeline-highlights li strong {
  color: var(--text-primary);
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.timeline-tags span {
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid var(--border-accent);
  border-radius: 20px;
  letter-spacing: 0.3px;
}

/* ---------- Skills ---------- */
.skills {
  background: var(--bg-secondary);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 80px;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

.skill-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

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

.skill-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  font-size: 1.3rem;
  color: var(--accent);
  transition: var(--transition);
}

.skill-card:hover .skill-icon {
  background: var(--accent);
  color: var(--bg-primary);
}

.skill-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.skill-card p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-muted);
}

/* Certifications */
.certifications-section {
  padding-top: 20px;
}

.sub-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.sub-title i {
  color: var(--accent);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.cert-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.cert-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.cert-icon {
  color: var(--accent);
  font-size: 1rem;
  flex-shrink: 0;
}

.cert-card span {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* ---------- Education ---------- */
.education {
  background: var(--bg-primary);
}

.education-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}

.edu-card {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.edu-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.edu-icon {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  font-size: 1.3rem;
  color: var(--accent);
}

.edu-content h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.edu-content h4 {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 8px;
}

.edu-institution {
  font-size: 0.88rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.edu-date {
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ---------- Contact ---------- */
.contact {
  background: var(--bg-secondary);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-lead {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-primary);
  margin-bottom: 32px;
}

.contact-cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: var(--transition);
  cursor: pointer;
}

.contact-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateX(8px);
}

.contact-card-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--accent-glow);
  border: 1px solid var(--border-accent);
  font-size: 1.1rem;
  color: var(--accent);
}

.contact-card-info {
  flex: 1;
}

.contact-card-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.contact-card-value {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
}

.contact-card-arrow {
  color: var(--text-muted);
  font-size: 0.8rem;
  transition: var(--transition);
}

.contact-card:hover .contact-card-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

/* Contact Visual */
.contact-map-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.map-decoration {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.map-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border-accent);
}

.map-ring:nth-child(1) {
  inset: 0;
  animation: pulseRing 3s ease-in-out infinite;
}

.map-ring:nth-child(2) {
  inset: 15px;
  animation: pulseRing 3s ease-in-out infinite 0.5s;
}

.map-ring:nth-child(3) {
  inset: 30px;
  animation: pulseRing 3s ease-in-out infinite 1s;
}

@keyframes pulseRing {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.05); }
}

.map-icon {
  font-size: 2.5rem;
  color: var(--accent);
  position: relative;
  z-index: 2;
}

.contact-map-card h3 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.contact-map-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* ---------- Footer ---------- */
.footer {
  padding: 48px 0 24px;
  background: var(--bg-primary);
  border-top: 1px solid var(--border);
}

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

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-brand .logo-text,
.footer-brand .logo-accent {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
}

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

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

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

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-social a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.footer-bottom {
  text-align: center;
}

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

/* ---------- Scroll Reveal Animations ---------- */
.reveal-up,
.reveal-left,
.reveal-right,
.reveal-scale {
  opacity: 0;
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-up {
  transform: translateY(40px);
}

.reveal-left {
  transform: translateX(-40px);
}

.reveal-right {
  transform: translateX(40px);
}

.reveal-scale {
  transform: scale(0.9);
}

.reveal-up.revealed,
.reveal-left.revealed,
.reveal-right.revealed,
.reveal-scale.revealed {
  opacity: 1;
  transform: translate(0, 0) scale(1);
}

/* ---------- Mobile Responsive ---------- */
@media (max-width: 1024px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-content {
    gap: 40px;
  }
  
  .image-frame {
    width: 300px;
    height: 300px;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }

  /* Mobile Navigation */
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 100px 32px 32px;
    gap: 4px;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
  }

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

  .nav-link {
    width: 100%;
    padding: 12px 0;
    font-size: 1rem;
  }

  .nav-link::after {
    display: none;
  }

  .nav-btn {
    margin-top: 16px;
    width: 100%;
    text-align: center;
    justify-content: center;
  }

  /* Mobile overlay */
  .nav-links.open::before {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: -1;
  }

  /* Hero */
  .hero {
    padding-top: calc(var(--nav-height) + 20px);
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

  .hero-text {
    order: 2;
  }

  .hero-image {
    order: 1;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-social {
    justify-content: center;
  }

  .image-frame {
    width: 240px;
    height: 240px;
  }

  .floating-badge {
    font-size: 0.75rem;
    padding: 8px 14px;
  }

  .badge-1 {
    right: 0;
  }

  .badge-2 {
    left: 0;
  }

  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  /* Skills */
  .skills-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  /* Education */
  .education-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .edu-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .edu-institution,
  .edu-date {
    justify-content: center;
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  /* Timeline */
  .timeline-content:hover {
    transform: translateX(4px);
  }

  /* Footer */
  .footer-content {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  /* Section */
  .section {
    padding: 64px 0;
  }

  .scroll-indicator {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-name {
    font-size: 2.5rem;
  }

  .stat-card {
    padding: 20px 16px;
  }

  .stat-number {
    font-size: 2rem;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .timeline-content {
    padding: 20px;
  }

  .timeline-item {
    padding-left: 36px;
  }

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

  .contact-card {
    padding: 16px;
  }
}

/* ---------- Utility / Performance ---------- */
@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;
  }
  
  .reveal-up,
  .reveal-left,
  .reveal-right,
  .reveal-scale {
    opacity: 1;
    transform: none;
  }
}