@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  /* METRIC THREAD SYSTEM - DARK (DEFAULT MOBILE) */
  --mt-bg-primary: #0b0c10;
  --mt-bg-secondary: #16181f;
  --mt-bg-surface: #1e212b;
  --mt-accent-neon: #00ffaa;
  --mt-accent-blue: #00d2ff;
  --mt-text-primary: #ffffff;
  --mt-text-secondary: #8c9baf;
  --mt-border: #2a2e39;
  --mt-error: #ff4757;
  --mt-warning: #ffa502;
  --mt-blueprint-line: rgba(0, 210, 255, 0.08);

  /* TYPOGRAPHY */
  --font-sans: 'Inter', sans-serif;
  --font-mono: 'Space Grotesk', monospace;

  /* METRICS */
  --seam-margin: 1.0cm;
  --notch-size: 0.5cm;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

[data-theme='light'] {
  /* METRIC THREAD SYSTEM - LIGHT (DEFAULT PC) */
  --mt-bg-primary: #f8f9fc;
  --mt-bg-secondary: #ffffff;
  --mt-bg-surface: #ffffff;
  --mt-accent-neon: #00c885;
  --mt-accent-blue: #0066ff;
  --mt-text-primary: #1e293b;
  --mt-text-secondary: #64748b;
  --mt-border: #e2e8f0;
  --mt-blueprint-line: rgba(0, 102, 255, 0.05);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--mt-bg-primary);
  color: var(--mt-text-primary);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Blueprint Grid Background Pattern */
.bg-blueprint {
  background-image: 
    linear-gradient(var(--mt-blueprint-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--mt-blueprint-line) 1px, transparent 1px),
    linear-gradient(var(--mt-blueprint-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--mt-blueprint-line) 1px, transparent 1px);
  background-size: 50px 50px, 50px 50px, 10px 10px, 10px 10px;
  background-position: -1px -1px, -1px -1px, -1px -1px, -1px -1px;
}

/* Typography Classes */
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-base { font-size: 1rem; line-height: 1.5rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }

.font-mono { font-family: var(--font-mono); }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-primary { color: var(--mt-text-primary); }
.text-secondary { color: var(--mt-text-secondary); }
.text-accent { color: var(--mt-accent-neon); }

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.pc-container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 2rem;
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* Components */
.card {
  background-color: var(--mt-bg-secondary);
  border: 1px solid var(--mt-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

[data-theme='light'] .card {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.input-group label {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--mt-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-field {
  width: 100%;
  background-color: var(--mt-bg-primary);
  border: 1px solid var(--mt-border);
  border-radius: var(--radius-md);
  padding: 0.875rem 1rem;
  color: var(--mt-text-primary);
  font-family: var(--font-mono);
  font-size: 1rem;
  transition: var(--transition);
}

.input-field:focus {
  outline: none;
  border-color: var(--mt-accent-blue);
  box-shadow: 0 0 0 2px rgba(0, 210, 255, 0.2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  gap: 0.5rem;
}

.btn-primary {
  background-color: var(--mt-accent-blue);
  color: #000;
  box-shadow: 0 4px 14px rgba(0, 210, 255, 0.4);
}

.btn-primary:hover {
  background-color: var(--mt-accent-neon);
  box-shadow: 0 4px 14px rgba(0, 255, 170, 0.4);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  border-color: var(--mt-accent-blue);
  color: var(--mt-accent-blue);
}

.btn-icon {
  background: transparent;
  border: none;
  color: var(--mt-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.btn-icon:hover {
  color: var(--mt-accent-blue);
  background-color: rgba(0, 210, 255, 0.1);
}

/* Navbars / Header */
.header-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background-color: var(--mt-bg-secondary);
  border-bottom: 1px solid var(--mt-border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-logo-horizontal {
  height: 36px;
  width: auto;
}

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--mt-bg-secondary);
  border-top: 1px solid var(--mt-border);
  display: flex;
  justify-content: space-around;
  padding: 0.75rem 0;
  z-index: 50;
  padding-bottom: calc(0.75rem + env(safe-area-inset-bottom));
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  color: var(--mt-text-secondary);
  text-decoration: none;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  transition: var(--transition);
}

.nav-item.active, .nav-item:hover {
  color: var(--mt-accent-neon);
}

.nav-item svg {
  width: 24px;
  height: 24px;
}

/* Badges & Tags */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 600;
  line-height: 1;
}

.badge-neon {
  background-color: rgba(0, 255, 170, 0.1);
  color: var(--mt-accent-neon);
  border: 1px solid rgba(0, 255, 170, 0.2);
}

.badge-blue {
  background-color: rgba(0, 210, 255, 0.1);
  color: var(--mt-accent-blue);
  border: 1px solid rgba(0, 210, 255, 0.2);
}

/* Utils */
.text-center { text-align: center; }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.ml-auto { margin-left: auto; }
.mr-2 { margin-right: 0.5rem; }

/* Camera / AR Overlay */
.ar-container {
  position: relative;
  width: 100%;
  height: 60vh;
  background-color: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--mt-border);
}

.ar-scanner {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: 
    linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)),
    url('data:image/svg+xml;utf8,<svg width="100%" height="100%" xmlns="http://www.w3.org/2000/svg"><line x1="0" y1="50%" x2="100%" y2="50%" stroke="%2300ffaa" stroke-width="0.5" stroke-dasharray="5 5"/><line x1="50%" y1="0" x2="50%" y2="100%" stroke="%2300ffaa" stroke-width="0.5" stroke-dasharray="5 5"/></svg>');
}

.ar-focus {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 200px;
  height: 200px;
  border: 2px solid var(--mt-accent-blue);
  box-shadow: 0 0 20px rgba(0, 210, 255, 0.3);
}

.ar-focus::before, .ar-focus::after,
.ar-focus span::before, .ar-focus span::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border-color: var(--mt-accent-neon);
  border-style: solid;
}

.ar-focus::before { top: -2px; left: -2px; border-width: 2px 0 0 2px; }
.ar-focus::after { top: -2px; right: -2px; border-width: 2px 2px 0 0; }
.ar-focus span::before { bottom: -2px; left: -2px; border-width: 0 0 2px 2px; }
.ar-focus span::after { bottom: -2px; right: -2px; border-width: 0 2px 2px 0; }

/* Desktop Split View */
.desktop-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 2rem;
  height: calc(100vh - 80px); /* Minus header */
}

.sidebar {
  background-color: var(--mt-bg-secondary);
  border-right: 1px solid var(--mt-border);
  padding: 1.5rem;
  overflow-y: auto;
}

.main-content {
  padding: 1.5rem 1.5rem 1.5rem 0;
  overflow-y: auto;
}

.canvas-area {
  background-color: var(--mt-bg-primary);
  border: 1px solid var(--mt-border);
  border-radius: var(--radius-lg);
  height: 100%;
  position: relative;
  overflow: hidden;
}

/* Form error states */
.input-error {
  border-color: var(--mt-error) !important;
}
.error-msg {
  color: var(--mt-error);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  margin-top: 0.25rem;
  display: none;
}