:root {
  --bg: #0d0d0f;
  --bg-elevated: #16161a;
  --text: #e4e4e7;
  --text-muted: #a1a1aa;
  --accent: #22c55e;
  --accent-dim: rgba(34, 197, 94, 0.15);
  --border: #27272a;
  --font-display: 'Syne', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --radius: 12px;
  --space: 1.5rem;
  --max-width: 1100px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space) 1.5rem;
  background: rgba(13, 13, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
}

.logo:hover {
  color: var(--accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-muted);
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--text);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

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

@media (max-width: 640px) {
  .nav-links {
    position: fixed;
    top: 57px;
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 1.5rem;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    gap: 1rem;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.2s, opacity 0.2s;
  }

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

  .nav-toggle {
    display: flex;
  }
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  padding: 6rem 1.5rem 4rem;
  max-width: var(--max-width);
  margin: 0 auto;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-dim), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(34, 197, 94, 0.06), transparent);
  pointer-events: none;
}

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

.hero-label {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin: 0 0 1rem;
  font-weight: 600;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 1.25rem;
  color: var(--text);
}

.hero-title em {
  font-style: normal;
  color: var(--accent);
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 32ch;
  margin: 0 0 2rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  transition: background 0.2s, color 0.2s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  text-decoration: none;
}

.btn-primary:hover {
  background: #16a34a;
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  text-decoration: none;
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--text-muted);
  text-decoration: none;
}

.hero-visual {
  display: none;
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
  }

  .device-mockup {
    width: 260px;
    height: 520px;
    background: var(--bg-elevated);
    border: 10px solid var(--border);
    border-radius: 32px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  }

  .device-mockup .screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--accent-dim) 0%, transparent 50%);
    border-radius: 22px;
  }
}

/* Sections */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  margin: 0 0 2rem;
  color: var(--text);
}

/* Work */
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.work-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.work-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-dim);
}

.work-icon {
  font-size: 1.75rem;
  display: block;
  margin-bottom: 0.75rem;
}

.work-card h3 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--text);
}

.work-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

/* About */
.about-inner {
  max-width: 42rem;
}

.about-text {
  font-size: 1.0625rem;
  color: var(--text-muted);
  margin: 0 0 1.5rem;
}

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

.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.skills li {
  background: var(--accent-dim);
  color: var(--accent);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
}

/* Contact */
.contact-intro {
  color: var(--text-muted);
  margin: 0 0 2rem;
  max-width: 36ch;
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s;
}

.contact-card:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
  text-decoration: none;
  color: var(--text);
}

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

.contact-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.contact-value {
  font-weight: 600;
  font-size: 1rem;
  word-break: break-all;
}

.contact-name {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem;
  text-align: center;
}

.footer p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}