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

:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --bg3: #1c2230;
  --border: #21272f;
  --accent: #0066ff;
  --accent-hover: #0052cc;
  --accent-glow: rgba(0,102,255,0.15);
  --text: #e6edf3;
  --text-muted: #8b949e;
  --good: #3fb950;
  --bad: #f85149;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius: 8px;
  --radius-lg: 12px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

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

section {
  padding: 96px 0;
  scroll-margin-top: 60px;
}

section h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-sub {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 56px;
  max-width: 600px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: 2px solid transparent;
  font-family: var(--font);
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow);
}

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

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.btn-full { width: 100%; text-align: center; }

/* ===== NAV ===== */
#nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13,17,23,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.03em;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: var(--radius);
  transition: color 0.2s;
}

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

.nav-cta {
  background: var(--accent) !important;
  color: #fff !important;
  padding: 6px 16px !important;
}

.nav-cta:hover { background: var(--accent-hover) !important; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.4rem;
  cursor: pointer;
}

/* ===== HERO ===== */
#hero {
  padding: 120px 0 100px;
  text-align: center;
  background: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(0,102,255,0.12) 0%, transparent 70%);
}

.hero-inner { max-width: 720px; margin: 0 auto; padding: 0 24px; }

.hero-badge {
  display: inline-block;
  background: var(--accent-glow);
  border: 1px solid rgba(0,102,255,0.3);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 100px;
  margin-bottom: 24px;
}

#hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-sub {
  color: var(--text-muted);
  font-size: 1.15rem;
  margin-bottom: 36px;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}

.hero-langs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 48px;
}

.hero-langs span {
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 4px 12px;
  border-radius: 4px;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

/* ===== SERVICES ===== */
#services { background: var(--bg2); }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.card-icon { font-size: 2rem; margin-bottom: 16px; }

.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 20px;
}

.card-price {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.card-price strong {
  color: var(--accent);
  font-size: 1rem;
}

/* ===== PORTFOLIO ===== */
#portfolio { background: var(--bg); }

.case-study {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 40px;
}

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

.case-header { margin-bottom: 24px; }

.case-tag {
  display: inline-block;
  background: var(--accent-glow);
  border: 1px solid rgba(0,102,255,0.3);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 2px 10px;
  border-radius: 4px;
  margin-bottom: 10px;
}

.case-meta h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.case-meta p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Code Tabs */
.code-tabs { margin-bottom: 28px; }

.tab-btns {
  display: flex;
  gap: 0;
  margin-bottom: 0;
}

.tab-btn {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 20px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font);
}

.tab-btn:first-child {
  border-radius: var(--radius) 0 0 0;
}

.tab-btn:last-child {
  border-radius: 0 var(--radius) 0 0;
  border-left: none;
}

.tab-btn.active {
  background: var(--bg);
  color: var(--text);
  border-bottom-color: var(--bg);
}

.tab-btn:not(.active):hover { color: var(--text); }

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

.tab-pane pre {
  margin: 0 !important;
  border-radius: 0 var(--radius) var(--radius) var(--radius) !important;
  border: 1px solid var(--border) !important;
  font-size: 0.82rem !important;
  max-height: 400px;
  overflow-y: auto;
}

/* Override Prism theme background */
.tab-pane pre[class*="language-"],
.tab-pane code[class*="language-"] {
  background: #0d1117 !important;
}

/* Metrics Table */
.metrics h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

th {
  background: var(--bg3);
  color: var(--text-muted);
  font-weight: 600;
  text-align: left;
  padding: 10px 14px;
  border: 1px solid var(--border);
}

td {
  padding: 9px 14px;
  border: 1px solid var(--border);
  color: var(--text-muted);
}

td:first-child { color: var(--text); font-weight: 500; }

td.good { color: var(--good); }
td.bad { color: var(--bad); }

tr:nth-child(even) td { background: rgba(255,255,255,0.015); }

/* ===== LANGUAGES ===== */
#languages {
  background: var(--bg2);
  text-align: center;
}

#languages .section-sub {
  margin-left: auto;
  margin-right: auto;
}

.lang-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
}

.lang-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  transition: border-color 0.2s, transform 0.2s;
  min-width: 120px;
}

.lang-item:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.lang-flag { font-size: 2.5rem; line-height: 1; }

.lang-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
}

/* ===== PRICING ===== */
#pricing { background: var(--bg); }

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  align-items: start;
}

.pricing-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color 0.2s;
}

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

.pricing-featured {
  border-color: var(--accent);
  position: relative;
}

.pricing-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 8px;
}

.pricing-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.pricing-price {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-muted);
}

.pricing-card ul {
  list-style: none;
  margin-bottom: 28px;
}

.pricing-card li {
  color: var(--text-muted);
  font-size: 0.92rem;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.pricing-card li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

.pricing-card li:last-child { border-bottom: none; }

/* ===== CONTACT ===== */
#contact { background: var(--bg2); }

.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 48px;
  align-items: start;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

input, textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  padding: 10px 14px;
  transition: border-color 0.2s;
  outline: none;
}

input:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

input::placeholder, textarea::placeholder { color: var(--text-muted); opacity: 0.6; }

textarea { resize: vertical; }

.contact-email {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 20px;
  font-size: 1rem;
  font-weight: 600;
}

.contact-note {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

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

.trust-items {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.trust-item {
  color: var(--text-muted);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.trust-item::first-letter { color: var(--good); font-weight: 700; }

/* ===== FOOTER ===== */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-logo {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.03em;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  section { padding: 64px 0; }

  .nav-toggle { display: block; }

  #nav { position: relative; }

  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    z-index: 200;
  }

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

  .nav-links a { display: block; padding: 10px 12px; }

  .form-row { grid-template-columns: 1fr; }

  .contact-wrap { grid-template-columns: 1fr; }

  .case-study { padding: 20px; }

  td, th { padding: 7px 10px; font-size: 0.8rem; }

  .tab-pane pre { font-size: 0.76rem !important; max-height: 300px; }

  .tab-btn { padding: 8px 14px; font-size: 0.8rem; }

  .footer-inner { flex-direction: column; text-align: center; }

  #hero { padding: 80px 0 64px; }

  .hero-langs { margin-top: 32px; }

  .metrics { overflow-x: auto; }
  table { min-width: 480px; }
}

@media (max-width: 480px) {
  .pricing-grid, .cards { grid-template-columns: 1fr; }
  .lang-grid { gap: 12px; }
  .lang-item { padding: 20px 24px; min-width: 90px; }

  /* Prevent horizontal scroll on small screens */
  .container { padding: 0 16px; }
  .case-study { padding: 16px; }
  .pricing-card, .card { padding: 24px; }
  section h2 { font-size: 1.6rem; }
}