/* ====== 1. CẤU TRÚC CHUNG ====== */
.nt-box {
    border: none;
    padding: 30px;
    border-radius: 16px;
    background: #f8faff; 
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    max-width: 1000px;
    margin: 0 auto;
}
.nt-box h3 {
    text-align: center;
    margin-bottom: 30px;
    color: #2c3e50;
    font-size: 24px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ====== 2. GIAO DIỆN BẢNG GIÁ COMBO (3 CỘT) ====== */
.nt-pricing-table {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    align-items: stretch; 
}

/* --- CẤU TRÚC THẺ (CARD) --- */
.nt-pricing-col {
    flex: 1;
    min-width: 280px;
    max-width: 320px;
    background: #fff;
    border-radius: 16px;
    position: relative;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.nt-pricing-col:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* --- PHẦN ĐẦU (HEADER) --- */
.nt-col-header {
    padding: 30px 20px;
    text-align: center;
    background: #fff;
    border-bottom: 1px solid #f0f0f0;
}
.nt-plan-name {
    font-size: 16px; 
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
    display: block;
}
.nt-old-price {
    font-size: 15px;
    color: #b2bec3;
    text-decoration: line-through;
    display: block;
    margin-bottom: 5px;
}
.nt-new-price {
    font-size: 34px; 
    font-weight: 800;
    color: #2d3436;
    line-height: 1.1;
    display: block;
}
.nt-save-label {
    background: #ffeaa7;
    color: #d35400;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 20px;
    display: inline-block;
    margin-top: 8px;
    text-transform: uppercase;
}

/* --- MÀU SẮC RIÊNG CHO TỪNG GÓI --- */

/* 1. GÓI CƠ BẢN (Màu Đen Nhẹ) */
.nt-pricing-col:nth-child(1) {
    border: 2px solid #2d3436; 
}
.nt-col-header.header-basic {
    background: #fdfdfd;
    border-bottom: 1px solid #eee;
}
.nt-col-header.header-basic .nt-plan-name { color: #2d3436; }
/* Nút bấm gói cơ bản */
.nt-pricing-col:nth-child(1) .nt-select-btn {
    background: #2d3436; 
    color: #fff;
}

/* 2. GÓI TIẾT KIỆM (Màu Xanh Ngọc) */
.nt-pricing-col:nth-child(2) {
    border: 2px solid #00b894; 
}
.nt-col-header.header-saving {
    background: #f0fdf4; 
    border-bottom: 1px solid #d1f2e0;
}
.nt-col-header.header-saving .nt-plan-name { color: #00b894; }
.nt-col-header.header-saving .nt-new-price { color: #00b894; }
/* Nút bấm gói tiết kiệm */
.nt-pricing-col:nth-child(2) .nt-select-btn {
    background: linear-gradient(135deg, #00b894 0%, #00cec9 100%);
    box-shadow: 0 4px 15px rgba(0, 184, 148, 0.3);
}

/* 3. GÓI SIÊU TIẾT KIỆM (Màu Cam Đỏ) */
.nt-pricing-col.best-value {
    border: 2px solid #e74c3c; 
    transform: scale(1.05);
    z-index: 10;
}
.nt-pricing-col.best-value .nt-col-header {
    background: #fff5f5;
    border-bottom: 1px dashed #e74c3c;
}
.nt-pricing-col.best-value .nt-plan-name { color: #e74c3c; }
.nt-pricing-col.best-value .nt-new-price { color: #e74c3c; }
/* Nút bấm gói VIP */
.nt-pricing-col.best-value .nt-select-btn {
    background: linear-gradient(135deg, #ff7675 0%, #d63031 100%);
    box-shadow: 0 4px 15px rgba(214, 48, 49, 0.4);
}
.nt-badge-best {
    position: absolute; top: 0; right: 0;
    background: #e74c3c; color: #fff;
    padding: 5px 15px; font-size: 11px; font-weight: bold;
    border-bottom-left-radius: 12px; text-transform: uppercase;
}

/* --- PHẦN THÂN (LIST) --- */
.nt-col-body {
    padding: 20px;
    flex-grow: 1;
    background: #fff;
}
.nt-col-body ul {
    list-style: none; padding: 0; margin: 0;
}
.nt-col-body li {
    margin-bottom: 15px; 
    font-size: 16px;     
    color: #000000;      
    font-weight: 500;    
    display: flex;
    align-items: center;
}
/* Dấu tích xanh */
.nt-col-body li::before {
    content: "✓";
    display: inline-flex; justify-content: center; align-items: center;
    width: 24px; height: 24px; 
    background: #e3f9e5; color: #27ae60;
    border-radius: 50%; margin-right: 12px;
    font-size: 14px; font-weight: bold; flex-shrink: 0;
}
/* Dấu X xám */
.nt-col-body li.disabled { 
    color: #999; 
    text-decoration: line-through; 
}
.nt-col-body li.disabled::before {
    content: "✕"; background: #f1f2f6; color: #b2bec3;
    text-decoration: none;
}

/* --- PHẦN CHÂN (NÚT) --- */
.nt-col-footer {
    padding: 20px;
    text-align: center;
    background: #fff;
    border-top: 1px solid #f9f9f9;
}
.nt-select-btn {
    display: block; width: 100%; padding: 14px;
    border: none; border-radius: 50px;
    color: #fff; font-weight: 700; font-size: 16px; 
    cursor: pointer; text-transform: uppercase;
    transition: transform 0.2s;
}
.nt-select-btn:hover { transform: scale(1.03); opacity: 0.9; }

/* ====== 3. GIAO DIỆN NẠP TIỀN THƯỜNG ====== */
.nt-classic-table {
    width: 100%; border-collapse: collapse;
    margin-bottom: 20px; background: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}
.nt-classic-table thead th {
    background-color: #4169e1 !important; color: #ffffff !important;
    padding: 12px; text-align: center; font-weight: bold;
    border: 1px solid #ccc; text-transform: uppercase;
}
.nt-classic-table tbody td {
    padding: 12px; border: 1px solid #ddd;
    text-align: center; color: #333; font-size: 14px;
}

/* KHUNG QR CHIA 2 CỘT */
.nt-qr-box {
    display: flex; gap: 30px; margin-top: 20px;
    border-top: 1px dashed #ddd; padding-top: 20px;
    align-items: flex-start;
}
.nt-qr-img { flex: 0 0 220px; text-align: center; }
.nt-qr-img img {
    max-width: 100%; border: 1px solid #eee;
    padding: 5px; background: #fff; border-radius: 8px;
}
.nt-qr-info { flex: 1; }

.nt-table-info {
    width: 100%; border-collapse: collapse;
    border: 1px solid #ddd; background: #fff;
}
.nt-table-info th {
    width: 35%; background: #f9f9f9; padding: 10px 15px;
    border: 1px solid #ddd; text-align: left; color: #555;
    font-weight: bold; text-transform: uppercase; font-size: 13px;
}
.nt-table-info td {
    padding: 10px 15px; border: 1px solid #ddd;
    color: #333; font-weight: 600; text-align: left; font-size: 14px;
}
.nt-text-danger { color: #d63031; }
.nt-txn-code { color: #d63031; font-weight: 800; font-size: 16px; }

.nt-support {
    background: #fff3cd; color: #856404; padding: 12px;
    margin-top: 15px; border: 1px solid #ffeeba;
    text-align: center; font-weight: bold; border-radius: 6px;
}
.nt-return-button {
    display: inline-block; margin-top: 20px;
    background: #0984e3; color: #fff !important;
    padding: 12px 25px; text-decoration: none;
    border-radius: 5px; font-weight: bold;
    text-transform: uppercase; transition: 0.2s;
}
.nt-return-button:hover { background: #0069d9; }

.nt-smart-btn-placeholder { color: #636e72; font-style: italic; font-size: 14px; }
.nt-downloader-placeholder {
    margin-top: 15px; padding: 20px; border: 2px dashed #b2bec3;
    border-radius: 8px; background: #fdfeff; text-align: center; display: none;
}
.nap-btn {
    display: inline-block; padding: 10px 20px; background: #0984e3;
    color: #fff !important; border-radius: 6px; text-decoration: none;
    font-weight: bold; border:none; cursor: pointer; font-size: 14px;
}
.nt-countdown-spinner-box svg { animation: spin 2s linear infinite; }
@keyframes spin { 100% { transform: rotate(360deg); } }

/* RESPONSIVE */
@media (max-width: 768px) {
    .nt-pricing-col.best-value { transform: none; margin-bottom: 20px; }
    .nt-pricing-col { max-width: 100%; margin-bottom: 20px; }
    .nt-qr-box { flex-direction: column; }
    .nt-qr-img { margin: 0 auto 15px; }
    .nt-table-info th, .nt-table-info td { font-size: 12px; padding: 8px; }
}