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

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

/* ===== CONTAINER ===== */
.container{width:100%;max-width:1140px;margin:auto;padding:0 16px}
.container-sm{max-width:720px}
.container-lg{max-width:1320px}

/* ===== GRID (Bootstrap row/col replacement) ===== */
.row{display:flex;flex-wrap:wrap;margin:-8px}
.col{flex:1;padding:8px}
.col-6{flex:0 0 50%;padding:8px}
.col-4{flex:0 0 33.333%;padding:8px}
.col-3{flex:0 0 25%;padding:8px}

/* Responsive */
@media(max-width:768px){
  .col-6,.col-4,.col-3{flex:0 0 100%}
}

/* ===== FLEX UTILITIES ===== */
.flex{display:flex}
.flex-between{display:flex;justify-content:space-between;align-items:center}
.flex-center{display:flex;justify-content:center;align-items:center}

/* ===== SPACING (margin/padding) ===== */
.mt-1{margin-top:8px}
.mt-2{margin-top:16px}
.mt-3{margin-top:24px}
.mb-1{margin-bottom:8px}
.mb-2{margin-bottom:16px}
.p-1{padding:8px}
.p-2{padding:16px}
.p-3{padding:24px}

/* ===== BUTTON ===== */
.btn{
  display:inline-block;
  padding:10px 16px;
  border-radius:6px;
  border:none;
  cursor:pointer;
  text-decoration:none;
  background:#2563eb;
  color:#fff;
  font-weight:600;
}
.btn:hover{opacity:.9}

/* ===== CARD ===== */
.card{
  border-radius:12px;
  padding:16px;
  background:#111827;
  color:#fff;
}

/* ===== NAVBAR ===== */
.nav{display:flex;justify-content:space-between;align-items:center;padding:12px 0}
.nav a{text-decoration:none;color:inherit;margin-left:16px}

/* ===== TABLE ===== */
.table{width:100%;border-collapse:collapse}
.table th,.table td{padding:12px;border-bottom:1px solid #ddd;text-align:left}

/* ===== RESPONSIVE IMAGE ===== */
.img-fluid{max-width:100%;height:auto}

.show{display:block !important}

.modal{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.6);
  display:none;
  justify-content:center;
  align-items:center;
}
.modal.open{display:flex}
.modal-box{background:#fff;padding:20px;border-radius:10px}
.dropdown-menu{display:none;position:absolute;background:#fff}