/* MAIN CATEGORY GRID */
.main-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:20px;
  margin-top:25px;
}

/* MAIN CATEGORY BOX */
.main-box{
  background:#ffffff;
  border:2px solid #e0e0e0;
  border-radius:12px;
  padding:30px 20px;
  text-align:center;
  box-shadow:0 6px 14px rgba(0,0,0,0.08);
  transition:.25s ease;
  cursor:pointer;
}

.main-box:hover{
  transform:translateY(-6px);
  box-shadow:0 12px 22px rgba(0,0,0,0.15);
}

/* DIFFERENT COLORS */
.ntrca{
  border-color:#1b5e20;
}
.bcs{
  border-color:#0d47a1;
}
.research{
  border-color:#6a1b9a;
}
.others{
  border-color:#ef6c00;
}

.main-box h2{
  margin:0;
  font-size: clamp(16px, 4vw, 20px);
}

/* ===== TIMER WRAPPER ===== */
.timer-wrapper {
  position: fixed;
  top: 15px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
}

/* ===== TIMER BOX ===== */
.timer-box {
  background: linear-gradient(135deg, #00c853, #64dd17);
  color: #fff;
  font-size: 18px;
  font-weight: bold;
  padding: 10px 25px;
  border-radius: 30px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  text-align: center;
  min-width: 180px;
  transition: 0.3s ease;
}

/* ===== WARNING (Last 5 Minutes) ===== */
.timer-warning {
  background: linear-gradient(135deg, #ff9800, #ff5722);
}

/* ===== DANGER (Last 2 Minutes) ===== */
.timer-danger {
  background: linear-gradient(135deg, #d50000, #ff1744);
}

/* ===== BODY TOP SPACE ===== */
#examMain {
  padding-top: 80px;
}

/* ================= EXISTING DESIGN (UNCHANGED) ================= */

/* Exam Title */
#examTitle{
  text-align:center;
  margin-bottom:20px;
}


/* Question Card */
.card{
    background:#ffffff;
    padding:20px;
    margin:20px auto;
    border-radius:15px;
    border:1px solid #e0e0e0;
    box-shadow:0 10px 25px rgba(0,0,0,0.10);
    transition: all 0.3s ease;
    max-width: 600px;
}

.card:hover{
  transform: translateY(-4px);
  box-shadow: 0 12px 25px rgba(0,0,0,0.12),
              0 6px 12px rgba(0,0,0,0.08);
}

.card h4{
  margin:0 0 15px 0;
  font-size:18px;
  color:#222;
  font-weight:600;
  line-height:1.4;
}

button{
    margin:10px 0;
    padding:14px;
    border:2px solid #000;
    border-radius:12px;
    cursor:pointer;
    background:#ffffff;
    color:#000000;
    font-size:16px;
    width:100%;
    transition:all .25s ease;
}

button:hover{
    background:#f5f5f5;
    transform:translateY(-2px);
}
button }:active{
  transform:scale(0.98);
}

.hidden{
  display:none;
}
  .card button.selected{
    background:#000 !important;
    color:#fff !important;
}
#lockedMessage{
  text-align:center;
  color:red;
  font-weight:bold;
  margin-bottom:20px;
}

/* ================= NEW LOGIN DESIGN (ADDED ONLY) ================= */

.login-wrapper{
  display:flex;
  justify-content:center;
  align-items:center;
  min-height:100vh;
}

.login-box{
  width:100%;
  max-width:420px;
  background:linear-gradient(135deg,#1e88e5,#43a047);
  padding:30px;
  border-radius:18px;
  box-shadow:0 15px 35px rgba(0,0,0,0.2);
  color:#fff;
}

.login-box h2{
  margin-top:0;
}

.login-box input{
  width:100%;
  padding:12px;
  margin-bottom:15px;
  border:none;
  border-radius:10px;
  font-size:16px;
  outline:none;
}

.login-box input:focus{
  box-shadow:0 0 0 3px rgba(0,255,150,0.6);
}

.warning{
  background:#ffebee;
  color:#c62828;
  padding:8px;
  border-radius:8px;
  margin-bottom:10px;
  display:none;
}
#examMain {
    width: 100%;
    max-width: 600px;   /* মোবাইলে সুন্দর সীমা */
    margin: 70px auto 0 auto;  /* উপরে 70px, বাকি auto center */
    padding: 0 10px;
    padding-top: 110px;
}
.scoreboard-card {
    max-width: 600px;
    margin: 20px auto;
    padding: 20px;
    border-radius: 15px;
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    color: white;
    text-align: center;
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.review-card {
    max-width: 600px;
    margin: 15px auto;
    padding: 15px;
    border-radius: 12px;
    background: #ffffff;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  }
body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}
/* ===== EXAM CORNER CARD DESIGN ===== */

.exam-card {
    padding: 25px;
    margin: 20px auto;
    border-radius: 14px;
    text-align: center;
    max-width: 600px;
    transition: 0.3s ease;
}

/* Live Exam */
.live-card {
    background: #eefaf1;   /* খুব হালকা সবুজ */
    border: 1px solid #cdeed8;
}

/* Locked Exam */
.locked-card {
    background: #f4f4f4;   /* হালকা ধূসর */
    border: 1px solid #e0e0e0;
}

/* Title spacing */
.exam-card h3 {
    margin-bottom: 20px;
}

/* Button small center look */
.exam-card button {
    width: 60%;
    margin: 0 auto;
}
.green{
  color: #0f9d58;
  font-weight: bold;
}

.red{
  color: #d93025;
  font-weight: bold;
}

.scoreboard-card h2{
  font-size:22px;
  font-weight:bold;
}