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

:root {
  --bg: #0f0f13;
  --bg-card: #1a1a23;
  --bg-card-hover: #22222e;
  --text: #e4e4ed;
  --text-muted: #9090a7;
  --accent: #6c5ce7;
  --accent-light: #a29bfe;
  --border: #2a2a38;
  --radius: 12px;
  --max-width: 1100px;
}

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

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 15, 19, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.logo {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--accent-light);
}

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

.nav-links a {
  font-size: 0.925rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.greeting {
  font-size: 1.05rem;
  color: var(--accent-light);
  margin-bottom: 8px;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, #a29bfe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: 1.15rem;
  color: var(--text);
  margin-bottom: 8px;
  font-weight: 500;
}

.subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  font-family: inherit;
}

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

.btn-primary:hover {
  background: #7d6ff0;
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  border-color: var(--accent-light);
  color: var(--accent-light);
}

.btn-large {
  padding: 16px 40px;
  font-size: 1rem;
  width: 100%;
  margin-top: 16px;
}

/* Code block visual */
.code-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.9rem;
  line-height: 1.8;
  box-shadow: 0 20px 60px rgba(108, 92, 231, 0.1);
}

.code-block pre {
  margin: 0;
}

.code-block code {
  color: var(--text-muted);
}

.code-block .kw { color: #c792ea; }
.code-block .str { color: #c3e88d; }
.code-block .num { color: #f78c6c; }

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

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-desc {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 56px;
  font-size: 1rem;
}

/* ===== Services ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all 0.25s;
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: #3a3a52;
  transform: translateY(-2px);
}

.service-icon {
  color: var(--accent-light);
  margin-bottom: 16px;
}

.service-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.925rem;
  margin-bottom: 16px;
  line-height: 1.65;
}

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

.tech-tags li {
  font-size: 0.8rem;
  padding: 4px 12px;
  background: rgba(108, 92, 231, 0.12);
  color: var(--accent-light);
  border-radius: 20px;
  font-weight: 500;
}

/* ===== About ===== */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 0.95rem;
  line-height: 1.75;
}

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

.highlights {
  display: flex;
  gap: 40px;
  margin-top: 32px;
}

.highlight {
  display: flex;
  flex-direction: column;
}

.highlight-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-light);
  line-height: 1.1;
}

.highlight-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.about-timeline {
  border-left: 2px solid var(--border);
  padding-left: 24px;
}

.timeline-item {
  position: relative;
  margin-bottom: 28px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -29px;
  top: 7px;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
}

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

.timeline-year {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-light);
  margin-bottom: 4px;
}

.timeline-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== Contact ===== */
.contact {
  padding-bottom: 140px;
}

.contact-card {
  max-width: 500px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
  color: var(--accent-light);
}

.contact-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 2px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-value {
  font-size: 1rem;
  color: var(--text);
}

a.contact-value:hover {
  color: var(--accent-light);
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

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

  .hero-visual {
    display: none;
  }

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

  .about-content {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .highlights {
    justify-content: center;
  }

  .nav-links {
    gap: 20px;
  }

  .section-title {
    font-size: 1.8rem;
  }
}