/* ── Custom Properties ─────────────────────────────────────────────────── */
:root {
  --bg:        #0a192f;
  --bg-card:   #112240;
  --bg-card2:  #1d3461;
  --accent:    #c9a84c;
  --accent-dim:#a8852f;
  --text:      #e6f1ff;
  --text-dim:  #8892b0;
  --border:    #233554;
  --font:      'Inter', sans-serif;
  --radius:    8px;
  --shadow:    0 4px 24px rgba(0,0,0,0.4);
  --transition:0.25s ease;
}

/* ── Reset ─────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: #e8c56b; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ── Utility ───────────────────────────────────────────────────────────── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-label {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 8px;
}
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
}
.section-title span { color: var(--accent); }
.section-divider {
  width: 60px;
  height: 3px;
  background: var(--accent);
  margin-bottom: 48px;
}
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ── Navigation ────────────────────────────────────────────────────────── */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10, 25, 47, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
#nav.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.5); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.nav-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
}
.nav-logo span { color: var(--accent); }
.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: 0.03em;
  position: relative;
  padding-bottom: 2px;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color: var(--accent); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 68px; left: 0; right: 0;
    background: #0d2137;
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 14px 24px;
    font-size: 1rem;
    width: 100%;
  }
  .nav-links a::after { display: none; }
}

/* ── Hero ──────────────────────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}
#hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(201,168,76,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 64px;
  align-items: center;
}
.hero-greeting {
  font-size: 1rem;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.hero-name {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--text);
  margin-bottom: 12px;
}
.hero-title {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 24px;
}
.hero-summary {
  font-size: 1rem;
  color: var(--text-dim);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.75;
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat .num {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.hero-stat .label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: #0a192f;
}
.btn-primary:hover {
  background: #e8c56b;
  color: #0a192f;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(201,168,76,0.3);
}
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}
.btn-outline:hover {
  background: rgba(201,168,76,0.08);
  color: var(--accent);
  transform: translateY(-2px);
}
.hero-photo-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-photo {
  width: 300px; height: 300px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  border: 4px solid var(--accent);
  box-shadow: 0 0 0 8px rgba(201,168,76,0.12), var(--shadow);
}

@media (max-width: 820px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-inner > div { order: 2; }
  .hero-photo-wrap { order: 1; margin-bottom: 8px; }
  .hero-photo { width: 200px; height: 200px; }
  .hero-summary { margin-left: auto; margin-right: auto; }
  .hero-stats { justify-content: center; }
  .hero-ctas { justify-content: center; }
}

/* ── About ─────────────────────────────────────────────────────────────── */
#about { background: var(--bg-card); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.about-text p {
  color: var(--text-dim);
  margin-bottom: 16px;
  line-height: 1.8;
}
.about-text p strong { color: var(--text); }
.expertise-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}
.tag {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.8rem;
  padding: 5px 12px;
  border-radius: 4px;
  transition: border-color var(--transition), color var(--transition);
}
.tag:hover { border-color: var(--accent); color: var(--accent); }

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
}

/* ── Experience ────────────────────────────────────────────────────────── */
#experience {}
.timeline { position: relative; }
.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 2px;
  background: var(--border);
  transform: translateX(-50%);
}
.timeline-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
  position: relative;
}
.timeline-item:nth-child(odd) .tl-card { grid-column: 1; }
.timeline-item:nth-child(odd) .tl-spacer { grid-column: 2; }
.timeline-item:nth-child(even) .tl-spacer { grid-column: 1; order: -1; }
.timeline-item:nth-child(even) .tl-card { grid-column: 2; }
.tl-dot {
  position: absolute;
  left: 50%;
  top: 24px;
  width: 14px; height: 14px;
  background: var(--accent);
  border-radius: 50%;
  transform: translateX(-50%);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 3px var(--accent);
}
.tl-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition), transform var(--transition);
}
.tl-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}
.tl-company {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 4px;
}
.tl-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.tl-date {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 16px;
}
.tl-bullets { padding-left: 0; }
.tl-bullets li {
  font-size: 0.875rem;
  color: var(--text-dim);
  padding-left: 16px;
  position: relative;
  margin-bottom: 8px;
  line-height: 1.6;
}
.tl-bullets li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
}
.tl-bullets li strong { color: var(--text); }

@media (max-width: 768px) {
  .timeline::before { left: 16px; }
  .timeline-item {
    grid-template-columns: 1fr;
    padding-left: 40px;
  }
  .timeline-item:nth-child(odd) .tl-card,
  .timeline-item:nth-child(even) .tl-card { grid-column: 1; }
  .tl-spacer { display: none; }
  .tl-dot { left: 16px; }
}

/* ── Skills ────────────────────────────────────────────────────────────── */
#skills { background: var(--bg-card); }
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.skill-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color var(--transition), transform var(--transition);
}
.skill-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}
.skill-card-icon {
  font-size: 1.5rem;
  margin-bottom: 10px;
}
.skill-card-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.skill-tag {
  background: var(--bg-card);
  color: var(--text-dim);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 3px;
  border: 1px solid var(--border);
}

/* ── Speaking ──────────────────────────────────────────────────────────── */
#speaking {}
.speaking-intro {
  font-size: 1rem;
  color: var(--text-dim);
  max-width: 640px;
  margin-bottom: 48px;
  line-height: 1.75;
}
.videos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.video-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
  color: inherit;
  text-decoration: none;
}
.video-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  color: inherit;
}
.video-thumb-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #000;
}
.video-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease, opacity 0.4s ease;
  opacity: 0.85;
}
.video-card:hover .video-thumb {
  transform: scale(1.04);
  opacity: 1;
}
.video-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: #fff;
  background: rgba(0,0,0,0.25);
  transition: background var(--transition);
}
.video-card:hover .video-play {
  background: rgba(201,168,76,0.35);
}
.video-meta {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.video-badge {
  display: inline-block;
  background: rgba(201,168,76,0.15);
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 3px;
  border: 1px solid rgba(201,168,76,0.3);
}
.video-yt-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  transition: color var(--transition);
}
.video-card:hover .video-yt-label { color: var(--accent); }

/* ── Community ─────────────────────────────────────────────────────────── */
#community { background: var(--bg-card); }
.community-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.community-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  transition: border-color var(--transition), transform var(--transition);
}
.community-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}
.community-icon { font-size: 2rem; margin-bottom: 16px; }
.community-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}
.community-role {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 12px;
}
.community-desc {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.7;
}

@media (max-width: 600px) {
  .community-grid { grid-template-columns: 1fr; }
}

/* ── Awards ────────────────────────────────────────────────────────────── */
#awards {}
.awards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.award-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.award-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.award-year {
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.award-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.4;
}
.award-org {
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ── Education ─────────────────────────────────────────────────────────── */
#education { background: var(--bg-card); }
.education-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.edu-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color var(--transition);
}
.edu-card:hover { border-color: var(--accent); }
.edu-icon { font-size: 2rem; margin-bottom: 16px; }
.edu-degree {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.4;
}
.edu-school {
  font-size: 0.875rem;
  color: var(--accent);
  margin-bottom: 4px;
}
.edu-location {
  font-size: 0.8rem;
  color: var(--text-dim);
}

@media (max-width: 600px) {
  .education-grid { grid-template-columns: 1fr; }
}

/* ── Contact / Footer ──────────────────────────────────────────────────── */
#contact {
  text-align: center;
  padding-bottom: 64px;
}
.contact-intro {
  font-size: 1rem;
  color: var(--text-dim);
  max-width: 520px;
  margin: 0 auto 40px;
  line-height: 1.75;
}
.contact-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.contact-link {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 14px 22px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  transition: all var(--transition);
}
.contact-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.footer-copy {
  font-size: 0.8rem;
  color: var(--text-dim);
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.footer-copy a { color: var(--accent); }