html {
    scroll-behavior: smooth;
  }

body {
    background: #f4fdf6;
}

.hero {
    background: linear-gradient(135deg, #0f7a3c, #2ecc71);
    color: #fff;
    padding: 60px 20px;
    text-align: center;
}

.hero h1 {
    font-weight: 700;
}

.nav-item{
    color: #fff;
}

.navbar .nav-link.active {
  font-weight: 600;
  border-bottom: 2px solid #fff;
}

.main-navbar {
  transition: all 0.3s ease;
}

.main-navbar.scrolled {
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.sticky-top {
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
    z-index: 1030; /* Ensure navbar stays above content */
}

.countdown {
    font-size: 18px;
    font-weight: 600;
    background: #fff;
    color: #d32f2f;
    padding: 10px 15px;
    border-radius: 8px;
    display: inline-block;
    margin-top: 15px;
}

.btn-register {
    background: linear-gradient(135deg, #e52d27, #b31217); /* লাল গ্র্যাডিয়েন্ট */
    border: none;
    transition: all 0.3s ease;
}

.btn-register:hover {
    background: linear-gradient(135deg, #b31217, #e52d27); /* hover এ উল্টো গ্র্যাডিয়েন্ট */
    transform: scale(1.05);
}


.card {
    border-radius: 14px;
    box-shadow: 0 10px 25px rgba(0,0,0,.08);
}

.btn-primary {
    background: linear-gradient(135deg, #0f7a3c, #2ecc71);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0c6431, #27ae60);
}

.fee-box {
    background: #e8f5e9;
    padding: 15px;
    border-radius: 10px;
    font-size: 18px;
    font-weight: 600;
    text-align: center;
}

.footer {
    background: #0f7a3c;
    color: #fff;
    padding: 15px;
    text-align: center;
    margin-top: 40px;
    font-size: 14px;
}


.receipt-area {
    max-width: 800px;
    margin: auto;
}

.timeline {
    position: relative;
    padding-left: 30px;
    margin-top: 20px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #28a745; /* green */
}

.timeline-item {
    position: relative;
    margin-bottom: 20px;
    padding-left: 20px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -7px;
    top: 5px;
    width: 14px;
    height: 14px;
    background: #28a745; /* green dot */
    border-radius: 50%;
}

.receipt {
    position: relative;
    max-width: 700px;
    margin: auto;
    border: 2px dashed #198754;
    padding: 30px;
    background: #fff;
    overflow: hidden;
}

/* Common watermark style */
.watermark {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-25deg);
    font-size: 80px;
    font-weight: 700;
    opacity: 0.12;
    z-index: 1;
    white-space: nowrap;
    pointer-events: none;
}

/* Paid */
.watermark.paid {
    color: #198754;
}

/* Unpaid */
.watermark.unpaid {
    color: #dc3545;
}

/* Content above watermark */
.receipt-content {
    position: relative;
    z-index: 2;
}

@media print {
    .no-print { display: none; }
}