:root {
  --bg: #0a0e17;
  --bg-alt: #0d1320;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-border: rgba(255, 255, 255, 0.08);
  --text: #e6ebf5;
  --text-muted: #8b96ab;
  --cyan: #00e5ff;
  --violet: #7c3aed;
  --magenta: #ff2fb1;
  --gradient: linear-gradient(120deg, var(--cyan), var(--violet));
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

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

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; line-height: 1.2; }

.accent { color: var(--cyan); }

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.eyebrow {
  font-family: var(--font-display);
  color: var(--cyan);
  letter-spacing: 0.05em;
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.center { text-align: center; margin-left: auto; margin-right: auto; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  border: 1px solid transparent;
}

.btn-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn-primary {
  background: var(--gradient);
  color: #05060a;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 229, 255, 0.25);
}

.btn-ghost {
  color: var(--text);
  border-color: var(--surface-border);
  background: var(--surface);
  backdrop-filter: blur(8px);
}

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

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.75);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--surface-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.nav-blog { color: var(--cyan) !important; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-switch {
  display: flex;
  border: 1px solid var(--surface-border);
  border-radius: 20px;
  overflow: hidden;
  background: var(--surface);
}

.lang-btn {
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 6px 12px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.lang-btn.active {
  background: var(--gradient);
  color: #05060a;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: all 0.25s ease;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.05);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(0, 229, 255, 0.15), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(124, 58, 237, 0.2), transparent 45%),
    linear-gradient(180deg, rgba(10, 14, 23, 0.85), rgba(10, 14, 23, 0.97));
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-name {
  font-family: var(--font-display);
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  margin-bottom: 20px;
}

.hero-tagline {
  color: var(--text-muted);
  font-size: 1.15rem;
  max-width: 560px;
  margin-bottom: 36px;
}

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

/* Stats */
.stats { padding: 60px 0; border-top: 1px solid var(--surface-border); border-bottom: 1px solid var(--surface-border); background: var(--bg-alt); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-suffix {
  font-family: var(--font-display);
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--cyan);
}

.stat p { color: var(--text-muted); margin-top: 8px; font-size: 0.95rem; }

/* Section spacing */
section:not(.hero):not(.stats) { padding: 120px 0; }

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: center;
}

.about-image img {
  border-radius: 16px;
  border: 1px solid var(--surface-border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.about-text h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); margin-bottom: 20px; }
.about-text p { color: var(--text-muted); margin-bottom: 16px; }

/* Stack */
.stack h2, .projects h2, .contact h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); margin-bottom: 56px; }

.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.stack-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  padding: 32px 24px;
  backdrop-filter: blur(10px);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.stack-card:hover {
  transform: translateY(-6px);
  border-color: var(--cyan);
  box-shadow: 0 20px 40px rgba(0, 229, 255, 0.1);
}

.stack-icon { font-size: 2rem; margin-bottom: 16px; }
.stack-card h3 { margin-bottom: 10px; font-size: 1.1rem; }
.stack-card p { color: var(--text-muted); font-size: 0.9rem; }

/* Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(124, 58, 237, 0.2);
}

.project-card img { height: 180px; object-fit: cover; }

.project-info { padding: 24px; }
.project-info h3 { margin-bottom: 10px; font-size: 1.1rem; }
.project-info p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 16px; }

.tag {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--cyan);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.25);
  padding: 6px 12px;
  border-radius: 20px;
  font-family: var(--font-display);
}

/* Clients */
.client-list {
  display: flex;
  flex-direction: column;
  gap: 72px;
}

.client-case {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.client-case.reverse .client-image { order: 2; }
.client-case.reverse .client-info { order: 1; }

.client-image {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--surface-border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.client-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(0, 229, 255, 0.12), rgba(124, 58, 237, 0.18));
  mix-blend-mode: overlay;
}

.client-image img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.client-case:hover .client-image img { transform: scale(1.04); }

.client-industry {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--cyan);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.25);
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.client-info h3 {
  font-size: 1.4rem;
  margin-bottom: 14px;
}

.client-info p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

.client-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* Contact */
.contact-sub { color: var(--text-muted); margin-bottom: 40px; }
.contact-links { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--surface-border);
  padding: 32px 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.9rem;
  flex-wrap: wrap;
  gap: 8px;
}

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 900px) {
  .stack-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .client-case,
  .client-case.reverse { grid-template-columns: 1fr; gap: 24px; }
  .client-case.reverse .client-image,
  .client-case.reverse .client-info { order: initial; }
  .client-list { gap: 48px; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(10, 14, 23, 0.98);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--surface-border);
    transform: translateY(-150%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }

  .nav-links.open { transform: translateY(0); opacity: 1; }

  section:not(.hero):not(.stats) { padding: 80px 0; }
}