/* ========================================
   CSS Variables & Reset
======================================== */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-card: #16161e;
  --bg-card-hover: #1c1c26;
  --accent: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.3);
  --accent-light: #818cf8;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: #1e1e2a;
  --border-light: #2a2a3a;
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

/* ========================================
   Typography
======================================== */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

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

/* ========================================
   Container & Layout
======================================== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 8rem 0;
}

.section-dark {
  background: var(--bg-secondary);
}

.section-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 4rem;
}

/* ========================================
   Navigation
======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.95);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  background: var(--accent);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.nav-logo:hover {
  transform: scale(1.05);
  box-shadow: 0 0 30px var(--accent-glow);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

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

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

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

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

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

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

/* ========================================
   Hero
======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  padding: 2rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(139, 92, 246, 0.08), transparent),
    radial-gradient(ellipse 50% 30% at 20% 80%, rgba(99, 102, 241, 0.05), transparent);
  pointer-events: none;
}

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

.hero-greeting {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero-name {
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 700;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 4rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3rem;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.stat-label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.stat-divider {
  width: 1px;
  height: 60px;
  background: var(--border-light);
}

.hero-scroll {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ========================================
   About
======================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.highlight-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: var(--transition);
}

.highlight-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.highlight-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.highlight-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.highlight-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ========================================
   Skills
======================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: var(--transition);
}

.skill-category:hover {
  border-color: var(--border-light);
  transform: translateY(-2px);
}

.skill-category-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.skill-tag {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.skill-tag:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  transform: scale(1.05);
}

/* ========================================
   Martial Arts
======================================== */
.ma-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}

.ma-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.ma-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  opacity: 0;
  transition: var(--transition);
}

.ma-card:hover {
  border-color: var(--accent);
  transform: translateY(-6px);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

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

.ma-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.ma-rank {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.ma-style {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.ma-card h3 {
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.ma-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.ma-current {
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(99, 102, 241, 0.1) 100%);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 2.5rem;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.ma-current-icon {
  font-size: 3rem;
}

.ma-current h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.ma-current p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ========================================
   Affiliations
======================================== */
.affiliations-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.affiliation-item {
  display: flex;
  gap: 3rem;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}

.affiliation-item:hover {
  border-color: var(--border-light);
  transform: translateX(8px);
}

.affiliation-year {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  min-width: 140px;
}

.affiliation-info h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.affiliation-info p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ========================================
   Contact
======================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.contact-intro p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.8;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}

.contact-link:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateX(8px);
}

.contact-link-icon {
  font-size: 1.5rem;
}

.contact-link span:last-child {
  font-weight: 500;
}

/* ========================================
   Footer
======================================== */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ========================================
   Animations (reveal on scroll)
======================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ========================================
   Mobile Responsive
======================================== */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .about-grid,
  .skills-grid,
  .ma-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    flex-direction: column;
    gap: 1.5rem;
  }

  .stat-divider {
    width: 60px;
    height: 1px;
  }

  .affiliation-item {
    flex-direction: column;
    gap: 1rem;
  }

  .ma-current {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 5rem 0;
  }

  .container {
    padding: 0 1.5rem;
  }

  .hero-name {
    font-size: 2.5rem;
  }

  .hero-tagline {
    font-size: 1rem;
  }

  .stat-number {
    font-size: 2.5rem;
  }
}