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

:root {
  --color-bg: #0a0a0a;
  --color-bg-alt: #111111;
  --color-bg-card: #1a1a1a;
  --color-text: #f0f0f0;
  --color-text-muted: #999999;
  --color-accent: #c8a86e;
  --color-accent-light: #dfc59b;
  --color-border: #2a2a2a;
  --color-border-hover: rgba(200, 168, 110, 0.3);
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --radius: 8px;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

ul { list-style: none; }

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.nav.scrolled {
  border-bottom-color: var(--color-border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  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(--color-accent);
  letter-spacing: 0.02em;
}

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

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition);
}

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

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

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

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

.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 0 24px 20px;
  gap: 16px;
}

.nav-mobile a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color var(--transition);
}

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

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 24px 60px;
  position: relative;
}

.hero-content {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-greeting {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.hero-title {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-accent-light);
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 480px;
  line-height: 1.7;
  margin-bottom: 36px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  padding: 14px 32px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 4px;
  transition: var(--transition);
  cursor: pointer;
}

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

.btn-primary:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
}

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

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

.hero-image {
  display: flex;
  justify-content: center;
}

.hero-image-wrapper {
  width: 380px;
  height: 460px;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

.hero-image-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 12px;
  border: 1px solid rgba(200, 168, 110, 0.2);
  pointer-events: none;
}

.hero-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  animation: bounce 2s ease infinite;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--color-text-muted);
  border-bottom: 2px solid var(--color-text-muted);
  transform: rotate(45deg);
  opacity: 0.4;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(10px); }
  60% { transform: translateX(-50%) translateY(5px); }
}

/* ===== Sections ===== */
.section {
  padding: 100px 0;
}

.section-label {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
  display: inline-block;
}

.section-label::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  width: 48px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
}

.section-intro {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 640px;
  margin-bottom: 48px;
  margin-top: 24px;
}

/* ===== About ===== */
.about {
  background: var(--color-bg-alt);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text {
  margin-top: 16px;
}

.about-headline {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 24px;
}

.about-text p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-text em {
  color: var(--color-text);
  font-style: italic;
}

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

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.highlight-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
}

.highlight-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.highlight-number {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.highlight-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ===== Perspectives ===== */
.perspectives-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.perspective-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 36px;
  transition: var(--transition);
  position: relative;
}

.perspective-card:hover {
  border-color: var(--color-border-hover);
}

.perspective-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.15;
  position: absolute;
  top: 20px;
  right: 28px;
  line-height: 1;
}

.perspective-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 20px;
  max-width: 90%;
}

.perspective-body > p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.perspective-point {
  margin-bottom: 20px;
}

.perspective-point:last-child {
  margin-bottom: 0;
}

.perspective-point h4 {
  font-size: 0.925rem;
  font-weight: 600;
  color: var(--color-accent-light);
  margin-bottom: 6px;
}

.perspective-point p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== Case Studies ===== */
.case-studies {
  background: var(--color-bg-alt);
}

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

.case-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 36px;
  transition: var(--transition);
}

.case-card:hover {
  border-color: var(--color-border-hover);
}

.case-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
  display: inline-block;
  background: rgba(200, 168, 110, 0.1);
  padding: 4px 12px;
  border-radius: 100px;
}

.case-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 28px;
}

.case-section {
  margin-bottom: 20px;
}

.case-section:last-child {
  margin-bottom: 0;
}

.case-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 6px;
  display: block;
}

.case-section p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== Background Section ===== */
.background-layout {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 60px;
  align-items: start;
}

.background-subhead {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 28px;
}

/* Timeline (simplified) */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: 36px;
}

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

.timeline-marker {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--color-accent);
  background: var(--color-bg);
  z-index: 1;
}

.timeline-item:first-child .timeline-marker {
  background: var(--color-accent);
}

.timeline-content {
  padding-bottom: 4px;
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
  gap: 12px;
}

.timeline-company {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.timeline-role {
  font-size: 0.875rem;
  color: var(--color-accent-light);
  font-weight: 500;
}

.timeline-date {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 500;
  white-space: nowrap;
}

.timeline-summary {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Sidebar */
.sidebar-block {
  margin-bottom: 36px;
}

.sidebar-block:last-child {
  margin-bottom: 0;
}

.edu-item {
  margin-bottom: 20px;
}

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

.edu-school {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.edu-degree {
  font-size: 0.9rem;
  color: var(--color-accent-light);
  font-weight: 500;
  margin-bottom: 2px;
}

.edu-detail {
  font-size: 0.825rem;
  color: var(--color-text-muted);
}

.sidebar-text {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 8px;
}

.sidebar-text:last-child {
  margin-bottom: 0;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.775rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: var(--transition);
}

.tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ===== Contact ===== */
.contact {
  text-align: center;
}

.contact .section-label::after {
  left: 50%;
  transform: translateX(-50%);
}

.contact-content {
  max-width: 560px;
  margin: 0 auto;
}

.contact-headline {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 16px;
  margin-top: 24px;
}

.contact-sub {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 40px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: var(--transition);
  min-width: 320px;
  justify-content: center;
}

.contact-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.contact-link svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ===== Footer ===== */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

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

/* ===== Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }

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

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

  .hero-image {
    order: -1;
  }

  .hero-image-wrapper {
    width: 280px;
    height: 340px;
  }

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

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

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

  .background-layout {
    grid-template-columns: 1fr;
  }

  .timeline-header {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

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

  .section {
    padding: 72px 0;
  }

  .section-label {
    font-size: 1.75rem;
    margin-bottom: 16px;
  }

  .hero {
    padding: 100px 24px 40px;
  }

  .hero-name {
    font-size: 2.25rem;
  }

  .highlight-card {
    padding: 20px 16px;
  }

  .perspective-card,
  .case-card {
    padding: 28px 24px;
  }

  .contact-link {
    min-width: auto;
    width: 100%;
  }
}