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

:root {
  --bg: #ffffff;
  --bg-dark: #0f0f0f;
  --surface: #f7f7f7;
  --surface-dark: #1a1a1a;
  --text: #111111;
  --text-muted: #666666;
  --text-light: #ffffff;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --border: #e5e5e5;
  --border-dark: #2a2a2a;
  --radius: 12px;
  --radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 40px rgba(0,0,0,0.14);
  --nav-height: 68px;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Playfair Display', Georgia, serif;
}

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

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

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

ul { list-style: none; }

/* ========================================
   LAYOUT UTILITIES
   ======================================== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-dark {
  background: var(--bg-dark);
  color: var(--text-light);
}

.section-dark .section-title {
  color: var(--text-light);
}

.section-dark .text-muted {
  color: #aaa;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 4px;
  background: var(--accent);
  border-radius: 2px;
  margin-top: 10px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 56px;
  margin-top: 6px;
}

.section-dark .section-subtitle {
  color: #aaa;
}

/* ========================================
   NAVIGATION
   ======================================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s;
}

.nav.scrolled {
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.nav-cta {
  background: var(--accent);
  color: white !important;
  padding: 8px 20px;
  border-radius: 100px;
  transition: background 0.2s !important;
}

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

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

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: white;
  border-bottom: 1px solid var(--border);
  z-index: 99;
  padding: 20px 24px;
}

.mobile-menu.open {
  display: block;
}

.mobile-menu ul {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-menu a {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
}

/* ========================================
   HERO
   ======================================== */
.hero {
  min-height: 100vh;
  padding-top: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 80px;
  max-width: 1100px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.hero-content {
  flex: 1;
  max-width: 560px;
}

.hero-greeting {
  font-size: 1.1rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-bottom: 8px;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1px;
  margin-bottom: 16px;
  color: var(--text);
}

.hero-tagline {
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 20px;
}

.hero-bio {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 36px;
}

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

.hero-visual {
  flex-shrink: 0;
}

.hero-photo {
  width: 320px;
  height: 380px;
  object-fit: cover;
  border-radius: 24px;
  box-shadow: var(--shadow-hover);
}

.hero-placeholder {
  width: 280px;
  height: 340px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--accent) 0%, #7c3aed 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  color: white;
  box-shadow: var(--shadow-hover);
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: 100px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

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

.btn-full {
  width: 100%;
  text-align: center;
}

/* ========================================
   ABOUT
   ======================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-top: 48px;
}

.about-text p {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 16px;
}

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

.fact-card {
  display: flex;
  flex-direction: column;
  padding: 24px 28px;
  background: var(--surface);
  border-radius: var(--radius);
  border-left: 4px solid var(--accent);
}

.fact-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 4px;
}

.fact-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ========================================
   TIMELINE
   ======================================== */
.timeline {
  position: relative;
  padding-left: 32px;
  margin-top: 48px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 0;
  width: 2px;
  background: var(--border-dark);
}

.timeline-item {
  position: relative;
  margin-bottom: 52px;
}

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

.timeline-dot {
  position: absolute;
  left: -39px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-dark);
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}

.timeline-role {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-light);
}

.timeline-period {
  font-size: 0.85rem;
  color: #888;
  background: var(--surface-dark);
  padding: 3px 10px;
  border-radius: 100px;
}

.timeline-company {
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 12px;
  font-weight: 500;
}

.timeline-desc {
  list-style: disc;
  padding-left: 18px;
  color: #bbb;
  font-size: 0.95rem;
  line-height: 1.75;
}

.timeline-desc li {
  margin-bottom: 4px;
}

/* ========================================
   PORTFOLIO
   ======================================== */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
  margin-top: 48px;
}

.project-card {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
  background: white;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.project-img {
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: var(--surface);
}

.project-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}

.project-card:hover .project-img img {
  transform: scale(1.04);
}

.project-img-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #e0e7ff, #ede9fe);
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.5px;
}

.project-info {
  padding: 24px;
}

.project-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.project-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.65;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.tag {
  font-size: 0.78rem;
  font-weight: 500;
  background: #e0e7ff;
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 100px;
}

.project-links {
  display: flex;
  gap: 12px;
}

.project-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: white;
  background: var(--accent);
  padding: 8px 18px;
  border-radius: 100px;
  transition: background 0.2s;
}

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

.project-link-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1.5px solid var(--border);
}

.project-link-ghost:hover {
  background: var(--surface);
  color: var(--text);
}

/* ========================================
   SOCIAL / OTHER ME
   ======================================== */
.social-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 48px;
}

.social-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 36px 24px;
  background: var(--surface-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text-light);
  transition: all 0.25s;
  text-align: center;
}

.social-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.25);
}

.social-icon {
  width: 36px;
  height: 36px;
  color: var(--accent);
}

.social-name {
  font-weight: 600;
  font-size: 1rem;
}

.social-handle {
  font-size: 0.85rem;
  color: #888;
}

/* ========================================
   CONTACT
   ======================================== */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 64px;
  align-items: start;
  margin-top: 48px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea {
  padding: 13px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text);
  background: white;
  transition: border-color 0.2s;
  outline: none;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-note {
  font-size: 0.88rem;
  color: var(--text-muted);
  min-height: 20px;
}

.contact-info {
  padding-top: 8px;
}

.contact-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
  margin-bottom: 12px;
}

.contact-email {
  display: block;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
  word-break: break-all;
}

.contact-email:hover {
  text-decoration: underline;
}

.contact-location {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: var(--bg-dark);
  color: #666;
  padding: 32px 0;
  text-align: center;
  font-size: 0.88rem;
}

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

/* ========================================
   ANIMATIONS
   ======================================== */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

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

  .nav-links { display: none; }
  .hamburger { display: flex; }

  .hero {
    flex-direction: column-reverse;
    gap: 40px;
    padding-top: calc(var(--nav-height) + 32px);
    text-align: center;
    min-height: auto;
    padding-bottom: 80px;
  }

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

  .hero-placeholder {
    width: 180px;
    height: 210px;
    font-size: 2.5rem;
  }

  .hero-photo {
    width: 200px;
    height: 240px;
  }

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

  .contact-wrap {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

@media (max-width: 480px) {
  .social-grid { grid-template-columns: 1fr; }
  .hero-name { font-size: 2.6rem; }
}