:root {
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --emerald-400: #34d399;
  --emerald-500: #10b981;
  --emerald-600: #059669;
  --red-300: #fca5a5;
  --red-800: #991b1b;
  --red-900-30: rgba(127, 29, 29, 0.3);
  --amber-200: #fde68a;
  --amber-700: #b45309;
  --amber-900-30: rgba(120, 53, 15, 0.3);
}

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

body {
  background: var(--slate-900);
  color: var(--slate-100);
  min-height: 100vh;
  font-family: ui-sans-serif, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.max-w-md { max-width: 28rem; }
.max-w-xl { max-width: 36rem; }
.max-w-2xl { max-width: 42rem; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-10 { margin-bottom: 2.5rem; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mt-10 { margin-top: 2.5rem; }
.mt-12 { margin-top: 3rem; }

.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-2\.5 { padding-top: 0.625rem; padding-bottom: 0.625rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.p-4 { padding: 1rem; }
.p-12 { padding: 3rem; }

.text-center { text-align: center; }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-8xl { font-size: 6rem; font-weight: 700; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.tracking-tight { letter-spacing: -0.025em; }
.leading-relaxed { line-height: 1.625; }

.text-slate-100 { color: var(--slate-100); }
.text-slate-200 { color: var(--slate-200); }
.text-slate-300 { color: var(--slate-300); }
.text-slate-400 { color: var(--slate-400); }
.text-slate-500 { color: var(--slate-500); }
.text-white { color: white; }
.text-red-300 { color: var(--red-300); }
.text-red-400 { color: #f87171; }

.bg-slate-700 { background: var(--slate-700); }
.bg-slate-800 { background: var(--slate-800); }
.bg-slate-900 { background: var(--slate-900); }
.bg-emerald-500 { background: var(--emerald-500); }
.bg-emerald-600 { background: var(--emerald-600); }
.bg-slate-600 { background: var(--slate-600); }
.bg-red-900-30 { background: var(--red-900-30); }
.bg-amber-900-30 { background: var(--amber-900-30); }
.border-amber-700 { border-color: var(--amber-700); }
.text-amber-200 { color: var(--amber-200); }

.border { border-width: 1px; }
.border-2 { border-width: 2px; }
.border-dashed { border-style: dashed; }
.border-slate-600 { border-color: var(--slate-600); }
.border-slate-700 { border-color: var(--slate-700); }
.border-red-800 { border-color: var(--red-800); }

.rounded { border-radius: 0.25rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-full { border-radius: 9999px; }

.w-full { width: 100%; }
.h-2 { height: 0.5rem; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

.flex { display: flex; }
.flex-1 { flex: 1; }
.flex-col { flex-direction: column; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.items-center { align-items: center; }

.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.space-y-6 > * + * { margin-top: 1.5rem; }

.hidden { display: none !important; }
.block { display: block; }
.cursor-pointer { cursor: pointer; }
.overflow-hidden { overflow: hidden; }
.transition-all { transition: all 0.2s; }
.duration-200 { transition-duration: 0.2s; }

input, select, button {
  font-family: inherit;
  font-size: inherit;
}
input::placeholder { color: var(--slate-500); }

/* Form elements */
input[type="text"], input[type="password"], select {
  background: var(--slate-800);
  border: 1px solid var(--slate-600);
  color: var(--slate-200);
  border-radius: 0.25rem;
  padding: 0.5rem 0.75rem;
}
input[type="text"]:focus, input[type="password"]:focus, select:focus {
  outline: none;
  border-color: var(--slate-500);
}

button {
  background: var(--emerald-600);
  color: white;
  border: none;
  border-radius: 0.5rem;
  padding: 0.625rem 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}
button:hover:not(:disabled) { background: var(--emerald-500); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

a { color: inherit; text-decoration: none; }
a:hover { color: var(--slate-400); }

/* Drop zone */
#dropZone, .drop-zone {
  border: 2px dashed var(--slate-600);
  border-radius: 0.5rem;
  cursor: pointer;
  transition: border-color 0.2s;
}
#dropZone:hover, .drop-zone:hover { border-color: var(--slate-500); }
#dropZone.hover, .drop-zone.hover { border-color: var(--emerald-500); }

/* Secondary button */
.bg-slate-600:hover { background: var(--slate-500); }
.bg-slate-700:hover { background: var(--slate-600); }

.text-slate-700\/80 { color: rgba(51, 65, 85, 0.8); }

/* Progress bar */
#progressBar { transition: width 0.2s; }

@media (min-width: 640px) {
  .sm\\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}