/* ===========================
   CSS Custom Properties
   =========================== */
:root {
  --nav-height: 64px;
  --bg-primary: #070d14;
  --bg-secondary: #0c1420;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(56, 189, 248, 0.38);

  --accent: #0ea5e9;
  --accent-light: #38bdf8;
  --accent-glow: rgba(14, 165, 233, 0.28);
  --accent-2: #14b8a6;
  --accent-2-glow: rgba(20, 184, 166, 0.18);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --gradient-hero: linear-gradient(130deg, #0ea5e9 0%, #14b8a6 100%);
  --gradient-card: linear-gradient(135deg, rgba(14, 165, 233, 0.12) 0%, rgba(20, 184, 166, 0.08) 100%);

  --font: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: var(--font);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
}

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

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

html,
body {
  max-width: 100%;
}

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

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

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

ul {
  list-style: none;
}

/* ===========================
   Background Noise & Grid
   =========================== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse 80% 50% at 10% 0%, rgba(56, 189, 248, 0.14) 0%, transparent 60%),
    radial-gradient(ellipse 60% 42% at 90% 100%, rgba(20, 184, 166, 0.1) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.06) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at center, rgba(0, 0, 0, 0.35), transparent 78%);
  pointer-events: none;
  z-index: 0;
}

/* ===========================
   Layout Utilities
   =========================== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 24px);
}

.section {
  padding: clamp(64px, 8vw, 96px) 0;
  position: relative;
  z-index: 1;
  scroll-margin-top: calc(var(--nav-height) + 18px);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 12px;
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--gradient-hero);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 16px;
}

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

/* ===========================
   Navigation
   =========================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 clamp(16px, 3vw, 24px);
  transition: var(--transition);
}

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

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.nav-logo {
  font-size: 1.1rem;
  font-weight: 700;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 32px);
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-hero);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::after {
  transform: scaleX(1);
}

.nav-cta {
  font-size: 0.8rem !important;
  font-weight: 600 !important;
  color: var(--text-primary) !important;
  background: var(--accent);
  padding: 8px 20px;
  border-radius: 100px;
  transition: var(--transition) !important;
  box-shadow: 0 0 20px var(--accent-glow);
}

.nav-cta:hover {
  background: var(--accent-light) !important;
  box-shadow: 0 0 30px var(--accent-glow) !important;
}

.nav-cta::after {
  display: none !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===========================
   Buttons
   =========================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  min-height: 44px;
  border-radius: 100px;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-hero);
  color: #fff;
  box-shadow: 0 4px 24px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

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

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

/* ===========================
   Hero Section
   =========================== */
.hero {
  min-height: auto;
  display: flex;
  align-items: flex-start;
  padding: calc(var(--nav-height) + 14px) clamp(16px, 3vw, 24px) 30px;
  position: relative;
  z-index: 1;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-light);
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

.hero-name {
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

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

.hero-title {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}

.tech-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.tech-tag:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

.tech-tag-icon {
  width: 14px;
  height: 14px;
  border-radius: 3px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  gap: clamp(18px, 4vw, 40px);
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.hero-stat-number {
  font-size: 1.75rem;
  font-weight: 800;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 4px;
}

/* ===========================
   Glass Card
   =========================== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-card);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

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

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

/* ===========================
   About Section
   =========================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-content p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 1rem;
  line-height: 1.85;
}

.about-content p:last-child {
  margin-bottom: 0;
}

.about-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}

.about-detail {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}

.about-detail-icon {
  width: 36px;
  height: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent-light);
  font-size: 1rem;
}

.about-detail-label {
  color: var(--text-muted);
  font-size: 0.78rem;
  display: block;
  margin-bottom: 2px;
}

.about-detail-value {
  color: var(--text-primary);
  font-weight: 500;
}

.services-grid {
  display: grid;
  gap: 16px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  transition: var(--transition);
}

.service-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.service-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-card h3::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

.service-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===========================
   Experience Section
   =========================== */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent-2), transparent);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-item.visible {
  opacity: 1;
  transform: translateX(0);
}

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

.timeline-dot {
  position: absolute;
  left: -39px;
  top: 6px;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border: 3px solid var(--bg-primary);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-glow);
}

.timeline-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.timeline-role {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.timeline-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.timeline-duration {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 100px;
}

.timeline-location {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.timeline-summary {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

.experience-extra {
  margin-top: 64px;
}

.learning-showcase {
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.05), rgba(129, 140, 248, 0.08));
  border: 1px solid rgba(129, 140, 248, 0.25);
  border-radius: var(--radius);
  padding: 26px;
}

.learning-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 14px;
}

.learning-heading {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.learning-subheading {
  font-size: 1.1rem;
  color: var(--accent-light);
  margin: 6px 0 0;
}

.learning-summary {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0 0 16px;
}

.learning-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.learning-track {
  background: rgba(10, 14, 30, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.learning-track-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 10px;
}

.learning-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.learning-list li {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.education-grid {
  display: grid;
  gap: 16px;
}

.education-grid .card {
  background: rgba(255, 255, 255, 0.055);
  border-color: rgba(129, 140, 248, 0.18);
}

/* ===========================
   Skills Section
   =========================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.tools-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: -20px 0 24px;
}

.tools-stack-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-right: 4px;
  align-self: center;
}

.tool-pill {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--accent-light);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.28);
  border-radius: 999px;
  padding: 6px 12px;
}

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

.skill-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-hero);
  transform: scaleX(0);
  transition: transform var(--transition);
}

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

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

.skill-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent-glow), var(--accent-2-glow));
  border: 1px solid var(--border-hover);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.skill-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.skill-desc {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===========================
   Certifications Section
   =========================== */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.cert-provider-row {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 0 14px;
  margin: 0 0 30px;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.cert-provider-tab {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  white-space: nowrap;
  opacity: 0.7;
  transition: opacity var(--transition), color var(--transition);
}

.cert-provider-tab:hover {
  opacity: 1;
  color: var(--text-primary);
}

.cert-provider-tab.active {
  opacity: 1;
  color: var(--text-primary);
}

.cert-level-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-light);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  padding: 2px 8px;
  border-radius: 100px;
}

.cert-provider-group {
  scroll-margin-top: 100px;
}

.cert-provider-group + .cert-provider-group {
  margin-top: 44px;
}

.cert-provider-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--text-primary);
  margin: 0 0 12px;
}

.cert-provider-subtitle {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin: 0 0 20px;
}

.cert-level-group + .cert-level-group {
  margin-top: 28px;
}

.cert-level-title {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin: 0 0 14px;
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.cert-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-hero);
  transform: scaleX(0);
  transition: transform var(--transition);
  transform-origin: left;
}

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

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

.cert-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.cert-badge {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--accent-glow), var(--accent-2-glow));
  border: 1px solid var(--border-hover);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.cert-external {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: color var(--transition);
}

.cert-card:hover .cert-external {
  color: var(--accent-light);
}

.cert-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  flex: 1;
}

.cert-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.cert-platform {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-light);
  background: rgba(99, 102, 241, 0.12);
  padding: 4px 10px;
  border-radius: 100px;
}

.cert-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===========================
   Case Studies Section
   =========================== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
  text-decoration: none;
  display: block;
  position: relative;
  overflow: hidden;
}

.case-card::after {
  content: '→';
  position: absolute;
  top: 24px;
  right: 24px;
  font-size: 1.2rem;
  color: var(--text-muted);
  transition: var(--transition);
}

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

.case-card:hover::after {
  color: var(--accent-light);
  transform: translate(4px, -4px);
}

.case-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.2);
  padding: 4px 10px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.case-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
  padding-right: 32px;
}

.case-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.case-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.case-meta-dot {
  width: 4px;
  height: 4px;
  background: var(--text-muted);
  border-radius: 50%;
}

/* ===========================
   Contact Section
   =========================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 48px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(129, 140, 248, 0.14);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.contact-info-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.contact-info p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.contact-availability {
  margin-top: 12px;
  font-size: 0.82rem;
  color: var(--accent-light);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(129, 140, 248, 0.24);
  border-radius: 10px;
  padding: 10px 12px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 8px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: color var(--transition);
  text-decoration: none;
}

.contact-link:hover {
  color: var(--accent-light);
}

.contact-link-icon {
  width: 38px;
  height: 38px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
  flex-shrink: 0;
}

.contact-link:hover .contact-link-icon {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.social-links {
  display: flex;
  gap: 12px;
  margin-top: 8px;
  flex-wrap: wrap;
}

.social-link {
  width: 42px;
  height: 42px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
  text-decoration: none;
  color: var(--text-secondary);
}

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

/* ===========================
   Contact Form
   =========================== */
.contact-form {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(129, 140, 248, 0.16);
  border-radius: var(--radius);
  padding: 36px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

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

.form-label {
  display: block;
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-input,
.form-textarea {
  width: 100%;
  background: rgba(255,255,255,0.055);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  font-family: var(--font);
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: var(--transition);
  outline: none;
  -webkit-appearance: none;
}

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

.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent);
  background: rgba(99, 102, 241, 0.05);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.form-submit {
  width: 100%;
  justify-content: center;
}

.form-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 12px;
  text-align: center;
}

/* ===========================
   Footer
   =========================== */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-logo {
  font-size: 1rem;
  font-weight: 700;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.footer-updated {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: color var(--transition);
  text-decoration: none;
}

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

/* ===========================
   Scroll Animations
   =========================== */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* ===========================
   Divider
   =========================== */
.section-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

.hero + .section-divider + .section {
  padding-top: 64px;
}

@media (max-width: 1024px) {
  .section {
    scroll-margin-top: calc(var(--nav-height) + 14px);
  }

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  }

  .certs-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }

  .cases-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }

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

/* ===========================
   Back to Top
   =========================== */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--accent);
  border: none;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 90;
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
  box-shadow: 0 4px 16px var(--accent-glow);
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  background: var(--accent-light);
  transform: translateY(-3px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  fill: #fff;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  .container {
    padding: 0 18px;
  }

  .section {
    padding: 56px 0;
  }

  .nav {
    padding: 0 16px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 20px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    max-height: calc(100svh - var(--nav-height));
    overflow-y: auto;
  }

  .nav-links li,
  .nav-links a,
  .nav-links .btn {
    width: 100%;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    min-height: auto;
    align-items: flex-start;
    padding: calc(var(--nav-height) + 4px) 0 36px;
  }

  .hero-inner {
    padding: 0 18px;
  }

  .hero-badge {
    margin-bottom: 16px;
  }

  .hero-title {
    margin-bottom: 14px;
  }

  .hero-desc {
    margin-bottom: 22px;
  }

  .hero-tech {
    gap: 8px;
    margin-bottom: 22px;
  }

  .tech-tag {
    font-size: 0.74rem;
    padding: 6px 12px;
  }

  .hero-stats {
    gap: 12px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .contact-info,
  .contact-form,
  .education-grid .card,
  .timeline .card {
    padding: 22px;
  }

  .timeline-header {
    flex-direction: column;
    gap: 8px;
  }

  .timeline-meta {
    align-items: flex-start;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-inner {
    padding: 0 16px;
  }

  .hero-name {
    font-size: 2rem;
    margin-bottom: 10px;
  }

  .hero-title {
    font-size: 0.95rem;
  }

  .hero-desc,
  .contact-info p,
  .timeline-summary,
  .skill-desc,
  .case-desc {
    font-size: 0.92rem;
    line-height: 1.7;
  }

  .hero-badge {
    font-size: 0.74rem;
    padding: 6px 14px;
  }

  .hero-tech {
    gap: 8px;
    margin-bottom: 18px;
  }

  .tech-tag {
    font-size: 0.72rem;
    padding: 5px 11px;
  }

  .hero-ctas {
    flex-direction: column;
    gap: 10px;
    margin-bottom: 24px;
  }

  .hero-stats {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 12px;
    align-items: start;
  }

  .hero-stat-number {
    font-size: 1.55rem;
  }

  .hero-stat-label {
    font-size: 0.75rem;
    line-height: 1.4;
  }

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

  .about-details {
    gap: 12px;
  }

  .about-detail {
    align-items: flex-start;
  }

  .contact-info,
  .contact-form,
  .education-grid .card,
  .timeline .card,
  .cert-card,
  .case-card,
  .skill-card {
    padding: 18px;
  }

  .form-input,
  .form-textarea {
    font-size: 16px;
    padding: 14px 15px;
  }

  .form-textarea {
    min-height: 140px;
  }

  .contact-link {
    align-items: flex-start;
    overflow-wrap: anywhere;
  }

  .section-title {
    line-height: 1.25;
  }

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

  .footer {
    padding-bottom: 96px;
  }

  .learning-grid,
  .cv-options {
    grid-template-columns: 1fr;
  }

  .learning-header {
    flex-direction: column;
    align-items: flex-start;
  }

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

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

  .cert-provider-row {
    gap: 16px;
    margin-bottom: 24px;
  }

  .cert-provider-tab {
    font-size: 0.9rem;
  }

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

  .cv-modal-panel {
    margin-top: 4vh;
    padding: 18px;
  }
}

@media (max-width: 380px) {
  .hero-stats {
    grid-template-columns: 1fr;
  }

  .hero-name {
    font-size: 1.85rem;
  }

  .hero-ctas {
    gap: 8px;
  }

  .btn {
    padding: 12px 16px;
    font-size: 0.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===========================
   SVG Icon Helpers
   =========================== */
.icon {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
}

/* ===========================
   Selection Style
   =========================== */
::selection {
  background: var(--accent-glow);
  color: var(--text-primary);
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

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

/* ===========================
   Form success message
   =========================== */
.form-success {
  display: none;
  padding: 16px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: var(--radius-sm);
  color: #4ade80;
  font-size: 0.88rem;
  text-align: center;
  margin-top: 16px;
}

.form-success.show {
  display: block;
}

/* ===========================
   CV Customization Modal
   =========================== */
.cv-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
}

.cv-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.cv-modal-panel {
  position: relative;
  width: min(680px, calc(100% - 32px));
  margin: 6vh auto 0;
  background: #0b1020;
  border: 1px solid rgba(148, 163, 184, 0.24);
  border-radius: var(--radius);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
  padding: 24px;
}

.cv-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.cv-modal-header h3 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.cv-modal-close {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  width: 34px;
  height: 34px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
}

.cv-customize-form {
  display: grid;
  gap: 12px;
}

.cv-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.cv-check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--text-secondary);
}

.cv-modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 6px;
}

/* ===========================
   Badge Section
   =========================== */
.badges-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}

.badge-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  transition: var(--transition);
  text-decoration: none;
}

.badge-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.badge-item img {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  object-fit: contain;
}

.badge-item-info span {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
}

.badge-item-info small {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ===========================
   Case Study Page
   =========================== */
.case-study-main {
  padding-top: calc(var(--nav-height) + 24px);
  position: relative;
  z-index: 1;
}

.case-study-shell {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px 72px;
}

.case-study-article {
  padding: 28px;
}

.case-study-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.case-study-breadcrumb a {
  color: var(--accent-light);
}

.case-study-breadcrumb a:hover {
  color: var(--text-primary);
}

.case-study-heading {
  margin-bottom: 22px;
}

.case-study-title {
  font-size: clamp(2rem, 4vw, 2.9rem);
  line-height: 1.15;
  margin-bottom: 10px;
}

.case-study-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.case-study-meta .case-tag {
  margin-bottom: 0;
}

.case-study-cover {
  width: 100%;
  height: auto;
  object-fit: contain;
  aspect-ratio: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 30px;
  box-shadow: var(--shadow);
}

.case-study-content {
  display: grid;
  gap: 28px;
}

.case-study-section h2 {
  font-size: 1.6rem;
  margin-bottom: 14px;
  line-height: 1.25;
}

.case-study-section h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.case-study-section p,
.case-study-section li {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.85;
}

.case-study-section p + p {
  margin-top: 14px;
}

.case-study-section ul,
.case-study-section ol {
  display: grid;
  gap: 8px;
  padding-left: 20px;
}

.case-study-section li::marker {
  color: var(--accent-light);
}

.case-study-note {
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(129, 140, 248, 0.18);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
}

.case-study-note h2 {
  margin-bottom: 10px;
}

.screenshot-list {
  display: grid;
  gap: 14px;
}

.screenshot-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.screenshot-item-number {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  flex-shrink: 0;
}

.screenshot-item p {
  margin: 0;
}

@media (max-width: 768px) {
  .case-study-main {
    padding-top: calc(var(--nav-height) + 16px);
  }

  .case-study-shell {
    padding: 0 18px 56px;
  }

  .case-study-article {
    padding: 22px;
  }

  .case-study-content {
    gap: 24px;
  }
}

@media (max-width: 480px) {
  .case-study-shell {
    padding: 0 16px 44px;
  }

  .case-study-article {
    padding: 18px;
  }

  .case-study-title {
    font-size: 1.9rem;
  }

  .case-study-section h2 {
    font-size: 1.35rem;
  }

  .case-study-section p,
  .case-study-section li {
    font-size: 0.95rem;
    line-height: 1.75;
  }

  .case-study-note {
    padding: 16px;
  }

  .screenshot-item {
    padding: 14px 15px;
  }
}