/* ===== IMPORTS ===== */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ===== DESIGN TOKENS ===== */
:root {
  --bg-primary: #0B0F19;
  --bg-secondary: #111827;
  --bg-surface: #1a2035;
  --bg-hover: #1e2843;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.16);
  --primary: #2563EB;
  --primary-hover: #1d4ed8;
  --primary-subtle: rgba(37, 99, 235, 0.1);
  --accent: #22C55E;
  --text-1: #E5E7EB;
  --text-2: #9CA3AF;
  --text-3: #6B7280;
  --white: #ffffff;
  --font: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-heading: 'Inter', system-ui, -apple-system, sans-serif;

  /* 8px spacing */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sp-12: 48px;
  --sp-16: 64px;
  --sp-20: 80px;
  --sp-24: 96px;

  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 200ms;
}

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

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

body {
  font-family: var(--font);
  background: var(--bg-primary) url('assets/background.avif') center / cover no-repeat fixed;
  color: var(--text-1);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* ===== LAYOUT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-6);
}

.section {
  padding: var(--sp-24) 0;
}

/* ===== SECTION HEADERS ===== */
.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--primary);
  margin-bottom: var(--sp-3);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: var(--sp-4);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-2);
  max-width: 520px;
  line-height: 1.7;
}

/* ===== SCROLL ANIMATIONS (staggered fade + slide) ===== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

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

.reveal-delay-1 {
  transition-delay: 0.06s;
}

.reveal-delay-2 {
  transition-delay: 0.12s;
}

.reveal-delay-3 {
  transition-delay: 0.18s;
}

.reveal-delay-4 {
  transition-delay: 0.24s;
}

/* staggered grid children */
.cert-grid .cert-card.reveal:nth-child(1) {
  transition-delay: 0s;
}

.cert-grid .cert-card.reveal:nth-child(2) {
  transition-delay: 0.05s;
}

.cert-grid .cert-card.reveal:nth-child(3) {
  transition-delay: 0.1s;
}

.cert-grid .cert-card.reveal:nth-child(4) {
  transition-delay: 0.15s;
}

.cert-grid .cert-card.reveal:nth-child(5) {
  transition-delay: 0.2s;
}

.cert-grid .cert-card.reveal:nth-child(6) {
  transition-delay: 0.25s;
}

.cert-grid .cert-card.reveal:nth-child(7) {
  transition-delay: 0.3s;
}

.cert-grid .cert-card.reveal:nth-child(8) {
  transition-delay: 0.35s;
}

.cert-grid .cert-card.reveal:nth-child(9) {
  transition-delay: 0.4s;
}

.cert-grid .cert-card.reveal:nth-child(10) {
  transition-delay: 0.45s;
}

.cert-grid .cert-card.reveal:nth-child(11) {
  transition-delay: 0.5s;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--sp-5) 0;
  transition: padding var(--duration) var(--ease), background var(--duration) var(--ease);
}

.navbar.scrolled {
  padding: var(--sp-3) 0;
  background: rgba(11, 15, 25, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

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

.nav-logo {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-1);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  transition: color var(--duration) var(--ease);
  position: relative;
}

/* Sliding underline from left to right on hover */
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--text-1);
  transition: width 0.25s var(--ease);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-1);
}

.nav-cta {
  padding: var(--sp-2) var(--sp-5) !important;
  border-radius: var(--radius-sm);
  background: var(--primary) !important;
  color: var(--white) !important;
  font-weight: 600 !important;
  transition: background var(--duration) var(--ease) !important;
}

.nav-cta:hover {
  background: var(--primary-hover) !important;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-1);
  z-index: 1001;
}

.hamburger span {
  width: 22px;
  height: 2px;
  background: var(--text-1);
  border-radius: 2px;
  transition: transform var(--duration) var(--ease), opacity var(--duration) var(--ease);
}

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

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

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

/* ===== HERO (with background image) ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--sp-20);
}

.hero-bg {
  display: none;
}

#hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  opacity: 0.35;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
}

/* --- Hero Two-Column Layout --- */
.hero-layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-12);
  position: relative;
  z-index: 2;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--text-2);
  font-weight: 500;
  margin-bottom: var(--sp-8);
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.4;
  }
}

.hero h1 {
  font-size: clamp(2rem, 5.5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: var(--sp-2);
  letter-spacing: -0.025em;
  color: var(--text-1);
}

/* Personal touch: first line (Hi, I'm) lighter than the name */
.hero h1::first-line {
  font-weight: 400;
  color: var(--text-2);
}

.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-2);
  margin-bottom: var(--sp-6);
  min-height: 1.8em;
}

.hero-tagline .typed-cursor {
  color: var(--primary);
  animation: blink 1s infinite;
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

.hero-description {
  font-size: 0.95rem;
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: var(--sp-8);
  max-width: 520px;
}

.hero-buttons {
  display: flex;
  gap: var(--sp-3);
  flex-wrap: wrap;
  margin-bottom: var(--sp-12);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  background: var(--primary);
  color: var(--white);
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
  transition: background var(--duration) var(--ease), transform var(--duration) var(--ease);
}

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

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  background: transparent;
  color: var(--text-1);
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: border-color var(--duration) var(--ease), background var(--duration) var(--ease), transform var(--duration) var(--ease);
}

.btn-secondary:hover {
  border-color: var(--border-hover);
  background: var(--bg-surface);
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: translateY(0) scale(0.98);
}

.hero-stats {
  display: flex;
  gap: var(--sp-10);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-3);
  font-weight: 500;
  margin-top: 2px;
}

/* --- LinkedIn Button --- */
.btn-linkedin {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  background: #0A66C2;
  color: var(--white);
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
  transition: background var(--duration) var(--ease), transform var(--duration) var(--ease);
}

.btn-linkedin:hover {
  background: #004182;
  transform: translateY(-1px);
}

.btn-linkedin:active {
  transform: translateY(0) scale(0.98);
}

/* --- Hero Avatar --- */
.hero-avatar {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.avatar-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.avatar-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle,
      rgba(37, 99, 235, 0.18) 0%,
      rgba(37, 99, 235, 0.06) 40%,
      transparent 70%);
  animation: avatar-pulse 4s ease-in-out infinite;
  pointer-events: none;
}

@keyframes avatar-pulse {

  0%,
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.7;
  }

  50% {
    transform: translate(-50%, -50%) scale(1.08);
    opacity: 1;
  }
}

.avatar-ring {
  position: relative;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  padding: 4px;
  background: linear-gradient(135deg,
      var(--primary) 0%,
      rgba(37, 99, 235, 0.4) 50%,
      var(--primary) 100%);
  background-size: 300% 300%;
  animation: ring-gradient 6s ease infinite;
}

@keyframes ring-gradient {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

.avatar-img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--bg-primary);
  transition: transform 0.4s var(--ease);
}

.avatar-ring:hover .avatar-img {
  transform: scale(1.03);
}

.avatar-badge {
  margin-top: var(--sp-4);
}

.avatar-badge span {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--text-2);
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: border-color var(--duration) var(--ease), color var(--duration) var(--ease);
}

.avatar-badge span:hover {
  border-color: var(--primary);
  color: var(--text-1);
}

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-16);
  align-items: start;
  margin-top: var(--sp-12);
}

.about-text p {
  color: var(--text-2);
  margin-bottom: var(--sp-5);
  line-height: 1.75;
  font-size: 0.95rem;
}

.about-text strong {
  color: var(--text-1);
  font-weight: 600;
}

/* Skills section - pill/tag style instead of progress bars */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.skill-item {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  transition: border-color var(--duration) var(--ease), background var(--duration) var(--ease);
}

.skill-item:hover {
  border-color: var(--border-hover);
  background: var(--bg-hover);
}

.skill-name {
  font-weight: 500;
  font-size: 0.8rem;
  color: var(--text-1);
}

.skill-name .icon {
  font-size: 0.9rem;
}

/* Progress bars removed - no .skill-percent, .skill-bar, .skill-fill needed */

/* ===== PROJECTS ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--sp-6);
  margin-top: var(--sp-12);
}

.project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--duration) var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.project-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s var(--ease);
}

.project-card:hover .project-image img {
  transform: scale(1.03);
}

.project-image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, var(--bg-surface));
}

.project-body {
  padding: var(--sp-6);
}

.project-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--sp-2);
  letter-spacing: -0.01em;
}

.project-desc {
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.65;
  margin-bottom: var(--sp-5);
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
}

.project-tag {
  padding: var(--sp-1) var(--sp-3);
  background: var(--primary-subtle);
  border-radius: var(--radius-xs);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--primary);
}

.project-links {
  display: flex;
  gap: var(--sp-3);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  transition: background var(--duration) var(--ease);
}

.project-link.github {
  background: var(--bg-hover);
  border: 1px solid var(--border);
  color: var(--text-1);
}

.project-link.github:hover {
  background: rgba(255, 255, 255, 0.08);
}

.project-link.live {
  background: var(--primary);
  color: var(--white);
}

.project-link.live:hover {
  background: var(--primary-hover);
}

/* ===== CERTIFICATIONS ===== */
.cert-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-8);
  margin-bottom: var(--sp-8);
}

.cert-filter-btn {
  padding: var(--sp-2) var(--sp-5);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-2);
  border: 1px solid var(--border);
  background: transparent;
  transition: color var(--duration) var(--ease), background var(--duration) var(--ease), border-color var(--duration) var(--ease);
}

.cert-filter-btn:hover {
  color: var(--text-1);
  border-color: var(--border-hover);
}

.cert-filter-btn.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--sp-6);
}

/* Certificate Card — premium interactions */
.cert-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  position: relative;
  will-change: transform;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.cert-card:hover {
  transform: translateY(-4px) scale(1.03);
  border-color: var(--border-hover);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.22);
}

/* click feedback */
.cert-card:active,
.cert-card.pressing {
  transform: translateY(0) scale(0.97);
  transition-duration: 80ms;
}

.cert-card.hidden {
  display: none;
}

/* cursor-follow glow */
.cert-card-glow {
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s var(--ease);
  z-index: 1;
  transform: translate(-50%, -50%);
}

.cert-card:hover .cert-card-glow {
  opacity: 1;
}

.cert-image {
  height: 180px;
  overflow: hidden;
  background: var(--bg-secondary);
  position: relative;
}

.cert-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s var(--ease);
  loading: lazy;
}

.cert-card:hover .cert-image img {
  transform: scale(1.03);
}

/* View Details overlay */
.cert-image-overlay {
  position: absolute;
  inset: 0;
  background: rgba(11, 15, 25, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.25s var(--ease);
  z-index: 2;
}

.cert-card:hover .cert-image-overlay {
  opacity: 1;
}

.cert-overlay-text {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--white);
  padding: var(--sp-2) var(--sp-4);
  background: var(--primary);
  border-radius: var(--radius-xs);
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
}

.cert-body {
  padding: var(--sp-5);
  position: relative;
  z-index: 2;
}

.cert-title {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: var(--sp-1);
  line-height: 1.4;
  color: var(--text-1);
}

.cert-issuer {
  font-size: 0.78rem;
  color: var(--text-3);
}

.cert-category-badge {
  display: inline-block;
  margin-top: var(--sp-3);
  padding: 2px var(--sp-3);
  border-radius: var(--radius-xs);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cert-category-badge.ai {
  background: rgba(37, 99, 235, 0.1);
  color: #60a5fa;
}

.cert-category-badge.programming {
  background: rgba(34, 197, 94, 0.1);
  color: var(--accent);
}

.cert-category-badge.tools {
  background: rgba(168, 85, 247, 0.1);
  color: #a78bfa;
}

.cert-category-badge.professional {
  background: rgba(251, 191, 36, 0.1);
  color: #fbbf24;
}

/* ===== CERTIFICATE DETAIL MODAL ===== */
.cert-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s var(--ease);
  padding: var(--sp-4);
}

.cert-modal.active {
  opacity: 1;
  visibility: visible;
}

/* Two-column layout — no scroll needed */
.cert-modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: min(900px, 95vw);
  max-height: 92vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: scale(0.95) translateY(16px);
  opacity: 0;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
}

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

/* Header — compact single row */
.cert-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--sp-4) var(--sp-5);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  gap: var(--sp-4);
}

.cert-modal-header-text {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  flex-wrap: wrap;
}

.cert-modal-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: -0.01em;
  margin: 0;
}

.cert-modal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  font-size: 0.75rem;
  color: var(--text-3);
}

.cert-modal-meta span {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}

.cert-modal-meta .meta-badge {
  display: inline-block;
  padding: 2px var(--sp-2);
  border-radius: var(--radius-xs);
  font-weight: 600;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cert-modal-close {
  width: 32px;
  height: 32px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-2);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--duration) var(--ease), color var(--duration) var(--ease), border-color var(--duration) var(--ease);
}

.cert-modal-close:hover {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.3);
}

/* Side-by-side body */
.cert-modal-body-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

/* Left: image panel */
.cert-modal-image {
  width: 45%;
  flex-shrink: 0;
  background: var(--bg-primary);
  border-right: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sp-5);
  overflow: hidden;
}

.cert-modal-image img {
  width: 100%;
  height: auto;
  max-height: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  object-fit: contain;
  transition: transform 0.35s var(--ease);
  cursor: zoom-in;
}

.cert-modal-image img:hover {
  transform: scale(1.03);
}

/* Right: details panel */
.cert-modal-body {
  flex: 1;
  padding: var(--sp-5);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.cert-modal-body::-webkit-scrollbar {
  width: 4px;
}

.cert-modal-body::-webkit-scrollbar-track {
  background: transparent;
}

.cert-modal-body::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: 100px;
}

.cert-modal-description {
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.7;
  margin: 0;
}

.cert-modal-divider {
  height: 1px;
  background: var(--border);
  margin: 0;
}

.cert-modal-skills-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-3);
  margin: 0;
}

.cert-modal-skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.cert-modal-skill-tag {
  padding: 4px var(--sp-3);
  background: var(--primary-subtle);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: var(--radius-xs);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--primary);
  transition: background var(--duration) var(--ease);
}

.cert-modal-skill-tag:hover {
  background: rgba(37, 99, 235, 0.2);
}

/* Mobile: stack vertically */
@media (max-width: 600px) {
  .cert-modal-body-layout {
    flex-direction: column;
  }

  .cert-modal-image {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
    max-height: 200px;
    padding: var(--sp-3);
  }

  .cert-modal-header-text {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-1);
  }
}

/* ===== CONTACT ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-16);
  margin-top: var(--sp-12);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}

.contact-info p {
  color: var(--text-2);
  line-height: 1.75;
  font-size: 0.95rem;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-5) var(--sp-6);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--duration) var(--ease), transform var(--duration) var(--ease);
}

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

.contact-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--white);
  flex-shrink: 0;
}

.contact-card-label {
  font-size: 0.75rem;
  color: var(--text-3);
  margin-bottom: 1px;
}

.contact-card-value {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-1);
}

.contact-card-icon.linkedin-icon {
  background: #0A66C2;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--sp-3) var(--sp-4);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-1);
  font-family: var(--font);
  font-size: 0.875rem;
  transition: border-color var(--duration) var(--ease);
  outline: none;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-3);
}

.btn-submit {
  padding: var(--sp-3) var(--sp-8);
  background: var(--primary);
  color: var(--white);
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
  transition: background var(--duration) var(--ease);
  align-self: flex-start;
}

.btn-submit:hover {
  background: var(--primary-hover);
}

/* ===== FOOTER ===== */
.footer {
  padding: var(--sp-10) 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-5);
}

.footer-socials {
  display: flex;
  gap: var(--sp-3);
}

.footer-socials a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  font-size: 0.95rem;
  transition: border-color var(--duration) var(--ease), color var(--duration) var(--ease);
}

.footer-socials a:hover {
  border-color: var(--border-hover);
  color: var(--text-1);
}

.footer-text {
  font-size: 0.8rem;
  color: var(--text-3);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-10);
  }
}

@media (max-width: 768px) {
  .section {
    padding: var(--sp-16) 0;
  }

  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 260px;
    height: 100vh;
    background: var(--bg-secondary);
    flex-direction: column;
    justify-content: center;
    gap: var(--sp-6);
    padding: var(--sp-10);
    border-left: 1px solid var(--border);
    transition: right 0.3s var(--ease);
  }

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

  .nav-links a {
    font-size: 1rem;
  }

  .hero-stats {
    gap: var(--sp-8);
  }

  .stat-number {
    font-size: 1.35rem;
  }

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

  .cert-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }

  .hero-buttons {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-layout {
    flex-direction: column-reverse;
    gap: var(--sp-8);
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

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

  .hero-buttons {
    align-items: center;
  }

  .avatar-ring {
    width: 200px;
    height: 200px;
  }

  .avatar-glow {
    width: 260px;
    height: 260px;
  }

  .hero-stats {
    justify-content: center;
    gap: var(--sp-6);
  }

  .cert-modal-content {
    width: 95vw;
    max-height: 95vh;
  }

  /* disable parallax on mobile */
  .cert-card {
    transform: none !important;
  }

  .cert-card:hover {
    transform: translateY(-4px) !important;
  }

  .cert-card-glow {
    display: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--sp-4);
  }

  .section {
    padding: var(--sp-12) 0;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--sp-4);
  }

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

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-surface);
  border-radius: 100px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-hover);
}