/* TRONIC — Professional dark theme */
:root {
  --bg: #0a0f1a;
  --bg-elevated: #0d1321;
  --panel: #111827;
  --panel-hover: #1a2332;
  --text: #f1f5f9;
  --text-secondary: #cbd5e1;
  --muted: #94a3b8;
  --primary: #1aa3ff;
  --primary-hover: #0d8be0;
  --primary-600: #167fcc;
  --accent: #00e5ff;
  --accent-soft: rgba(0, 229, 255, 0.15);
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --ring: rgba(26, 163, 255, 0.4);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(26, 163, 255, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { height: 100%; }

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background:
    radial-gradient(ellipse 1400px 900px at 85% -15%, rgba(0, 229, 255, 0.06), transparent),
    radial-gradient(ellipse 1200px 700px at 15% -10%, rgba(26, 163, 255, 0.08), transparent),
    radial-gradient(ellipse 800px 500px at 50% 100%, rgba(26, 163, 255, 0.03), transparent),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
  max-width: 1140px;
  padding: 0 28px;
  margin: 0 auto;
}

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  background: linear-gradient(to bottom, rgba(10, 15, 26, 0.9), rgba(10, 15, 26, 0.7));
  border-bottom: 1px solid var(--border);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-mark {
  height: 32px;
  width: 32px;
  display: block;
}

.logo-wordmark {
  height: 22px;
  display: block;
}

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

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 8px 16px;
  font-weight: 500;
  font-size: 15px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav a.btn {
  margin-left: 8px;
}

/* ============ Language Switcher ============ */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.lang-btn {
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-btn:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
}

.lang-btn.active {
  color: var(--bg);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 2px 8px rgba(26, 163, 255, 0.3);
}

/* ============ Mobile Menu Toggle ============ */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.05);
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: var(--bg);
  border-color: transparent;
  box-shadow: var(--shadow-md), 0 0 20px rgba(26, 163, 255, 0.2);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(26, 163, 255, 0.3);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(4px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* ============ Hero Section ============ */
.hero {
  padding: 100px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
}

.hero-text {
  position: relative;
  z-index: 2;
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  margin: 0 0 32px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
  max-width: 520px;
}

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

.hero-art {
  position: relative;
  height: 400px;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.7;
  animation: float 8s ease-in-out infinite;
}

.orb-1 {
  width: 280px;
  height: 280px;
  right: 5%;
  top: 10%;
  background: radial-gradient(circle at 30% 30%, var(--accent), transparent 65%);
  animation-delay: 0s;
}

.orb-2 {
  width: 200px;
  height: 200px;
  left: 10%;
  bottom: 10%;
  background: radial-gradient(circle at 50% 50%, var(--primary), transparent 65%);
  animation-delay: -4s;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-20px) scale(1.05); }
}

.grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 70%);
}

/* ============ Sections ============ */
.section {
  padding: 80px 0;
}

.section-alt {
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.015), transparent);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section h2 {
  margin: 0 0 40px;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

/* ============ Service Cards ============ */
.cards {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(3, 1fr);
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.card:hover::before {
  opacity: 1;
}

.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(26, 163, 255, 0.12), rgba(0, 229, 255, 0.08));
  border: 1px solid rgba(26, 163, 255, 0.2);
  border-radius: var(--radius-md);
  color: var(--primary);
}

.card h3 {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

/* ============ Technology Grid ============ */
.tech-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(2, 1fr);
}

.tech {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition-normal);
}

.tech:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.tech-head {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 4px;
}

.badge {
  display: inline-flex;
  align-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(0, 229, 255, 0.3);
  padding: 6px 14px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.tech h3 {
  margin: 12px 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  flex-basis: 100%;
}

.tech p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.tech ul {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.tech li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  color: var(--text-secondary);
  font-size: 14px;
}

.tech li:last-child {
  margin-bottom: 0;
}

.tech li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
}

/* ============ Contact Section ============ */
.contact {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 8px 24px;
  max-width: 600px;
}

.contact .row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  align-items: baseline;
}

.contact .row:last-child {
  border-bottom: 0;
}

.contact .label {
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
}

.contact .value {
  color: var(--text);
  font-size: 15px;
  word-break: break-word;
}

.contact .value a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.contact .value a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.contact-loading {
  color: var(--muted);
  padding: 20px;
}

.contact-note {
  color: var(--muted);
  font-size: 14px;
  margin-top: 16px;
}

/* ============ Footer ============ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  background: rgba(10, 15, 26, 0.6);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 14px;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .header-inner {
    height: 64px;
  }

  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 20px;
    background: var(--bg);
    border-top: 1px solid var(--border);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: 99;
  }

  .nav.nav-open {
    transform: translateX(0);
  }

  .nav a {
    padding: 16px;
    font-size: 16px;
    border-radius: var(--radius-sm);
  }

  .nav a.btn {
    margin-left: 0;
    margin-top: 12px;
    text-align: center;
  }

  .lang-switcher {
    order: -1;
  }

  .hero {
    padding: 60px 0 40px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-art {
    order: -1;
    height: 240px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero p {
    font-size: 16px;
  }

  .section {
    padding: 60px 0;
  }

  .section h2 {
    margin-bottom: 28px;
  }

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

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

  .contact {
    padding: 4px 16px;
  }

  .contact .row {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 14px 0;
  }

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

  .footer-links {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    width: 100%;
    justify-content: center;
  }

  .lang-switcher {
    padding: 2px;
  }

  .lang-btn {
    padding: 5px 10px;
    font-size: 11px;
  }
}

/* ============ Selection ============ */
::selection {
  background: rgba(26, 163, 255, 0.3);
  color: var(--text);
}

/* ============ Focus styles ============ */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}