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

/* ========== CSS VARIABLES ========== */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #10101a;
  --bg-card: #161625;
  --bg-card-hover: #1c1c30;
  --bg-surface: #1a1a2e;
  --border: #2a2a40;
  --border-light: #3a3a55;
  --text-primary: #e8e8f0;
  --text-secondary: #8888a0;
  --text-muted: #5a5a72;
  --accent-blue: #4f7cff;
  --accent-violet: #7c5cff;
  --accent-cyan: #38bdf8;
  --accent-green: #34d399;
  --accent-amber: #fbbf24;
  --accent-rose: #f472b6;
  --gradient-primary: linear-gradient(135deg, #4f7cff, #7c5cff);
  --gradient-hero: linear-gradient(180deg, #0a0a0f 0%, #10101a 100%);
  --font-sans: 'Inter', -apple-system, sans-serif;
  --font-display: 'Space Grotesk', sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 30px rgba(79, 124, 255, 0.08);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

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

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

a:hover {
  color: var(--accent-violet);
}

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

ul {
  list-style: none;
}

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

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

.section {
  padding: 100px 0;
  position: relative;
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-blue);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 640px;
  margin-bottom: 48px;
}

/* Fade in animation */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ========== NAVBAR ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}

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

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

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

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition);
  border-radius: 2px;
}

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

/* Mobile menu button */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

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

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(79, 124, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 124, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(79, 124, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 56px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-avatar-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-portrait-container {
  position: relative;
  width: 100%;
  max-width: 320px;
  aspect-ratio: 3/4;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid rgba(79, 124, 255, 0.25);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 30px rgba(79, 124, 255, 0.15);
  transition: var(--transition);
  background: #0d0d17;
}

.hero-portrait-container:hover {
  transform: translateY(-6px);
  border-color: rgba(79, 124, 255, 0.5);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.7), 0 0 45px rgba(79, 124, 255, 0.3);
}

.portrait-ambient-glow {
  position: absolute;
  inset: -10px;
  background: radial-gradient(circle at 50% 30%, rgba(79, 124, 255, 0.2), transparent 70%);
  pointer-events: none;
  z-index: 1;
}

.hero-portrait-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform 0.5s ease;
  display: block;
}

.hero-portrait-container:hover .hero-portrait-img {
  transform: scale(1.03);
}

.portrait-chip {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(14, 14, 24, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 100px;
  font-size: 0.78rem;
  color: var(--text-primary);
  font-weight: 500;
  white-space: nowrap;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}

.portrait-chip .chip-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
  animation: pulse-dot 2s infinite;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  background: rgba(22, 22, 37, 0.6);
}

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

@keyframes pulse-dot {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.4;
  }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 8px;
  letter-spacing: -1px;
}

.hero h1 .gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title-sub {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 500;
  color: var(--accent-blue);
  margin-bottom: 20px;
}

.hero-tagline {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 8px;
  line-height: 1.7;
}

.hero-tagline-secondary {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 36px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(79, 124, 255, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(79, 124, 255, 0.35);
  color: #fff;
}

.btn-secondary {
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  background: rgba(22, 22, 37, 0.5);
}

.btn-secondary:hover {
  border-color: var(--accent-blue);
  background: rgba(79, 124, 255, 0.08);
  color: var(--text-primary);
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  animation: float 3s ease-in-out infinite;
  transition: opacity 0.5s ease;
}

.scroll-indicator.hidden {
  opacity: 0;
  pointer-events: none;
}

@keyframes float {

  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  50% {
    transform: translateX(-50%) translateY(8px);
  }
}

/* ========== METRICS BAR ========== */
.metrics-bar {
  padding: 48px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
}

.metric-item {
  text-align: center;
  padding: 16px;
  position: relative;
}

.metric-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--border);
}

.metric-value {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.metric-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}

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

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 18px;
  font-size: 1rem;
}

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

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.about-highlight-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(79, 124, 255, 0.05);
  border: 1px solid rgba(79, 124, 255, 0.12);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.about-highlight-item:hover {
  background: rgba(79, 124, 255, 0.1);
  border-color: rgba(79, 124, 255, 0.25);
}

.highlight-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
  flex-shrink: 0;
}

.highlight-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
  font-weight: 500;
}

.pipeline {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.pipeline-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.pipeline-title {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 0;
}

.pipeline-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: rgba(79, 124, 255, 0.08);
  border: 1px solid rgba(79, 124, 255, 0.2);
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-blue);
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.pipeline-toggle-btn:hover {
  background: rgba(79, 124, 255, 0.18);
  border-color: var(--accent-blue);
  color: #fff;
}

.pipeline-toggle-btn .toggle-chevron {
  transition: transform 0.3s ease;
}

.pipeline-toggle-btn.expanded .toggle-chevron {
  transform: rotate(180deg);
}

.pipeline-steps-wrapper {
  position: relative;
  transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

.pipeline-steps-wrapper.collapsed {
  max-height: 145px;
  /* Displays top 3 steps */
}

.pipeline-steps-wrapper.expanded {
  max-height: 750px;
  /* Displays all 10 steps */
}

.pipeline-fade-mask {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50px;
  background: linear-gradient(180deg, transparent 0%, var(--bg-card) 100%);
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.pipeline-steps-wrapper.expanded .pipeline-fade-mask {
  opacity: 0;
}

.pipeline-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.pipeline-step {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
  position: relative;
}

.pipeline-step .step-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  transition: var(--transition);
}

.pipeline-step:hover .step-dot {
  background: var(--accent-blue);
  box-shadow: 0 0 10px rgba(79, 124, 255, 0.3);
}

.pipeline-step:hover {
  color: var(--text-primary);
}

.pipeline-step:not(:last-child)::before {
  content: '';
  position: absolute;
  left: 4.5px;
  top: 28px;
  width: 1px;
  height: calc(100% - 8px);
  background: var(--border);
}

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

.filter-btn {
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  background: transparent;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  color: var(--text-primary);
  border-color: var(--accent-blue);
  background: rgba(79, 124, 255, 0.1);
}

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

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition);
}

.project-card:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(79, 124, 255, 0.12);
}

/* Featured card stronger accent */
.project-card.featured-main {
  border-color: rgba(79, 124, 255, 0.25);
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(79, 124, 255, 0.04) 100%);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(79, 124, 255, 0.15);
}

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

.project-card.featured-main {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.project-type {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-violet);
  margin-bottom: 10px;
}

.project-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.35;
  color: var(--text-primary);
}

.project-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 18px;
  line-height: 1.6;
}

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

.tag {
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 500;
  background: rgba(79, 124, 255, 0.1);
  color: var(--accent-blue);
  border: 1px solid rgba(79, 124, 255, 0.15);
}

.tag.cv {
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-cyan);
  border-color: rgba(56, 189, 248, 0.15);
}

.tag.nlp {
  background: rgba(52, 211, 153, 0.1);
  color: var(--accent-green);
  border-color: rgba(52, 211, 153, 0.15);
}

.tag.iot {
  background: rgba(251, 191, 36, 0.1);
  color: var(--accent-amber);
  border-color: rgba(251, 191, 36, 0.15);
}

.project-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.project-result {
  font-weight: 600;
  color: var(--accent-green);
}

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

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

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

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

.timeline-dot {
  position: absolute;
  left: -29px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent-blue);
  z-index: 1;
}

.timeline-item:first-child .timeline-dot {
  background: var(--accent-blue);
  box-shadow: 0 0 12px rgba(79, 124, 255, 0.3);
}

.timeline-period {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 6px;
}

.timeline-item h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-org {
  color: var(--accent-blue);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.timeline-item ul {
  padding-left: 0;
}

.timeline-item li {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 6px;
  padding-left: 16px;
  position: relative;
}

.timeline-item li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent-blue);
  font-weight: 700;
}

.timeline-result {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 14px;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.15);
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-green);
}

/* ========== SKILLS ========== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.skill-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}

.skill-group:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow-glow);
}

.skill-group-icon {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(79, 124, 255, 0.08);
  border: 1px solid rgba(79, 124, 255, 0.18);
  color: var(--accent-blue);
  margin-bottom: 16px;
  transition: var(--transition);
}

.skill-group:hover .skill-group-icon {
  background: rgba(79, 124, 255, 0.2);
  border-color: var(--accent-blue);
  color: #fff;
  box-shadow: 0 0 16px rgba(79, 124, 255, 0.4);
}

.skill-group h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.skill-tag {
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.skill-tag:hover {
  color: var(--accent-blue);
  border-color: rgba(79, 124, 255, 0.3);
  background: rgba(79, 124, 255, 0.06);
}

/* ========== ACHIEVEMENTS ========== */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

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

.achievement-card:hover {
  border-color: var(--accent-amber);
  box-shadow: 0 0 24px rgba(251, 191, 36, 0.08);
}

/* Spotlight tier for top achievements */
.achievement-card.achievement-spotlight {
  border-color: rgba(251, 191, 36, 0.3);
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(251, 191, 36, 0.04) 100%);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(251, 191, 36, 0.15);
}

.achievement-card.achievement-spotlight:hover {
  border-color: var(--accent-amber);
  box-shadow: 0 8px 32px rgba(251, 191, 36, 0.15);
  transform: translateY(-4px);
}

.achievement-spotlight-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--accent-amber);
  background: rgba(251, 191, 36, 0.1);
  border: 1px solid rgba(251, 191, 36, 0.25);
  padding: 3px 8px;
  border-radius: 100px;
}

.achievement-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.achievement-card h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
}

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

/* Certifications */
.cert-section {
  margin-top: 16px;
}

.cert-provider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.cert-provider h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.provider-logo-img {
  width: 26px;
  height: 26px;
  object-fit: contain;
  border-radius: 4px;
  flex-shrink: 0;
  display: inline-block;
  vertical-align: middle;
}

.provider-logo-img.logo-alibaba {
  background: #ffffff;
  padding: 2px;
  border-radius: 5px;
}

.provider-logo-img.logo-idea {
  height: 22px;
  width: auto;
}

.provider-logo-img.logo-ttp {
  background: #ffffff;
  padding: 2px 5px;
  border-radius: 5px;
  height: 24px;
  width: auto;
}

.provider-logo-img.logo-openai {
  width: 24px;
  height: 24px;
  background: transparent;
  padding: 0;
  border-radius: 0;
  filter: brightness(0) invert(1);
}

.cert-provider .cert-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.cert-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 32px;
}

.cert-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

a.cert-item {
  text-decoration: none;
  cursor: pointer;
}

.cert-item:hover {
  border-color: var(--border-light);
  color: var(--text-primary);
}

a.cert-item:hover {
  border-color: rgba(79, 124, 255, 0.4);
  color: var(--text-primary);
  background: rgba(79, 124, 255, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.cert-ext-icon {
  margin-left: auto;
  font-size: 0.75rem;
  opacity: 0.5;
  transition: opacity 0.3s ease, transform 0.3s ease, color 0.3s ease;
}

a.cert-item:hover .cert-ext-icon {
  opacity: 1;
  transform: translate(2px, -2px);
  color: var(--accent-blue);
}

.cert-item::before {
  content: '✓';
  color: var(--accent-green);
  font-weight: 700;
  font-size: 0.8rem;
}

/* ========== CONTACT ========== */
.contact-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-content h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.contact-content>p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 1.05rem;
}

.contact-availability {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 32px;
  padding: 18px 24px;
  background: rgba(79, 124, 255, 0.04);
  border: 1px solid rgba(79, 124, 255, 0.12);
  border-radius: var(--radius-md);
  text-align: left;
}

.availability-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.avail-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
  flex-shrink: 0;
  animation: pulse-dot 2s infinite;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: nowrap;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.88rem;
  transition: var(--transition);
  background: var(--bg-card);
  white-space: nowrap;
}

.contact-link:hover {
  border-color: var(--accent-blue);
  background: rgba(79, 124, 255, 0.08);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.contact-link.copied {
  border-color: var(--accent-green) !important;
  color: var(--accent-green) !important;
  background: rgba(52, 211, 153, 0.12) !important;
}

.contact-link svg {
  width: 18px;
  height: 18px;
}

.contact-link-wa:hover {
  border-color: #25D366;
  background: rgba(37, 211, 102, 0.08);
  color: #25D366;
}

/* ========== MARQUEE TICKER ========== */
.marquee-ticker {
  background: #08080d;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  padding: 14px 0;
  white-space: nowrap;
  position: relative;
}

.marquee-ticker::before,
.marquee-ticker::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 60px;
  z-index: 2;
  pointer-events: none;
}

.marquee-ticker::before {
  left: 0;
  background: linear-gradient(90deg, #08080d 0%, transparent 100%);
}

.marquee-ticker::after {
  right: 0;
  background: linear-gradient(-90deg, #08080d 0%, transparent 100%);
}

.marquee-track {
  display: inline-flex;
  gap: 36px;
  animation: marquee-scroll 25s linear infinite;
}

.marquee-track span {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-secondary);
  text-transform: uppercase;
  transition: var(--transition);
}

.marquee-track span:hover {
  color: var(--accent-cyan);
  text-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
}

@keyframes marquee-scroll {
  0% {
    transform: translateX(0);
  }

  100% {
    transform: translateX(-50%);
  }
}

/* ========== INTERACTIVE PIPELINE ========== */
.pipeline-step {
  cursor: pointer;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  user-select: none;
}

.pipeline-step.active,
.pipeline-step:hover {
  background: rgba(79, 124, 255, 0.08);
  color: var(--text-primary);
}

.pipeline-step.active .step-dot {
  background: var(--accent-blue);
  box-shadow: 0 0 12px rgba(79, 124, 255, 0.6);
}

.pipeline-detail-card {
  margin-top: 24px;
  padding: 20px;
  background: rgba(16, 16, 26, 0.8);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.pipeline-detail-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.pipeline-tag {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--accent-blue);
  color: #fff;
  letter-spacing: 1px;
}

.pipeline-detail-header h4 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.pipeline-detail-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

.pipeline-tools-badge {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  display: inline-block;
}

/* ========== AI DIAGNOSTICS FOOTER ========== */
.footer-diagnostics {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.diag-item {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.status-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
  animation: pulse-dot 1.8s infinite;
}

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

/* ========== RESPONSIVE ========== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    text-align: center;
  }

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

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

  .hero-avatar-wrapper {
    order: -1;
  }

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

  .project-card.featured-main {
    grid-column: span 1;
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 15, 0.98);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 24px;
    z-index: 999;
  }

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

  .nav-links a {
    font-size: 1.2rem;
  }

  .nav-toggle {
    display: flex;
    z-index: 1001;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .pipeline {
    grid-column: span 1;
  }

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

  .metric-item:nth-child(3)::after {
    display: none;
  }

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

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

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

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

  .btn {
    justify-content: center;
  }

  .footer-diagnostics {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .metric-item:nth-child(2)::after,
  .metric-item:nth-child(4)::after {
    display: none;
  }

  .hero h1 {
    font-size: clamp(2rem, 10vw, 3rem);
  }

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

  .cert-provider h4 {
    font-size: 0.9rem;
    flex-wrap: wrap;
    gap: 6px;
  }

  .cert-provider .cert-date {
    font-size: 0.72rem;
  }

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

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

  .contact-link {
    justify-content: center;
  }
}

/* Small mobile: 480px and below — stack contact buttons */
@media (max-width: 480px) {
  .contact-links {
    flex-direction: column;
    align-items: stretch;
  }

  .contact-link {
    justify-content: center;
  }
}

/* Small mobile: 375px and below */
@media (max-width: 375px) {
  .container {
    padding: 0 16px;
  }

  .section {
    padding: 60px 0;
  }

  .hero {
    padding: 100px 0 60px;
  }

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

  .metric-value {
    font-size: 1.4rem;
  }

  .project-card {
    padding: 18px;
  }

  .skill-group {
    padding: 20px;
  }

  .pipeline {
    padding: 20px;
  }

  .achievement-card {
    padding: 20px;
  }
}

/* Large desktop: 1400px and above */
@media (min-width: 1400px) {
  :root {
    --max-width: 1320px;
  }

  body {
    font-size: 1.05rem;
  }

  .hero h1 {
    font-size: clamp(3rem, 4vw, 4.5rem);
  }

  .hero-grid {
    grid-template-columns: 1fr 380px;
    gap: 80px;
  }

  .about-grid {
    gap: 72px;
  }

  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }

  .skills-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .achievements-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }
}

/* Ultra-wide: 1800px and above */
@media (min-width: 1800px) {
  :root {
    --max-width: 1600px;
  }

  .hero-grid {
    grid-template-columns: 1fr 420px;
    gap: 100px;
  }

  .metrics-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .skills-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .achievements-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .section {
    padding: 120px 0;
  }
}

/* Ensure content images scale properly at all sizes */
img:not(.provider-logo-img):not(.hero-portrait-img) {
  max-width: 100%;
  height: auto;
}

/* Prevent horizontal overflow on all screens */
body,
.container,
section,
.hero,
.metrics-bar,
.marquee-ticker,
footer {
  max-width: 100vw;
  overflow-x: hidden;
}