/* =========================
   Reset + base (Tailwind-like)
   ========================= */

*,
*::before,
*::after {
  box-sizing: border-box;
  border-width: 0;
  border-style: solid;
}

html {
  line-height: 1.5;
  font-family: system-ui, -apple-system, BlinkMacSystemFont,
               "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  margin: 0;
  background-color: #f9fafb;
  color: #111827;
}

/* =========================
   Layout
   ========================= */

.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 640px) {
  .container { max-width: 640px; }
}
@media (min-width: 768px) {
  .container { max-width: 768px; }
}
@media (min-width: 1024px) {
  .container { max-width: 1080px; }
}

/* =========================
   Flexbox utilities
   ========================= */

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

/* =========================
   Spacing
   ========================= */

.p-2 { padding: 0.5rem; }
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }

.px-4 {
  padding-left: 1rem;
  padding-right: 1rem;
}

.py-2 {
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }

/* =========================
   Typography
   ========================= */

.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-center { text-align: center; }
.text-gray-500 { color: #6b7280; }
.text-gray-700 { color: #374151; }
.text-white { color: #ffffff; }

/* =========================
   Background + border
   ========================= */

.bg-white { background-color: #ffffff; }
.bg-gray-100 { background-color: #f3f4f6; }
.bg-blue-600 { background-color: #2563eb; }
.bg-blue-700 { background-color: #1d4ed8; }

.rounded {
  border-radius: 0.375rem;
}
.rounded-lg {
  border-radius: 0.5rem;
}

.border {
  border-width: 1px;
  border-color: #e5e7eb;
}

/* =========================
   Button
   ========================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background-color: #2563eb;
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #1d4ed8;
}

/* =========================
   Card
   ========================= */

.card {
  background-color: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 0.5rem;
  padding: 1.25rem;
}

/* =========================
   Input
   ========================= */

.input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border-radius: 0.375rem;
  border: 1px solid #d1d5db;
  font-size: 0.875rem;
}

.input:focus {
  outline: none;
  border-color: #2563eb;
}

/* =========================
   Utility
   ========================= */

.hidden { display: none; }
.w-full { width: 100%; }
.h-full { height: 100%; }