:root {
    --bg: radial-gradient(circle at top, #0f172a, #020617);
    --card-bg: rgba(15, 23, 42, 0.75);
    --border: rgba(168, 85, 247, 0.3);
    --premium-purple: #a855f7;
    --premium-blue: #0ea5e9;
    --premium-gold: #facc15;
    --text: #ffffff;
    --text-dim: #94a3b8;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: var(--bg);
    color: var(--text);
    padding-bottom: 60px;
}

.container {
    padding: 0 20px;
    max-width: 600px;
    margin: 0 auto;
}

/* Header */
.header {
    height: 70px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border);
    margin-bottom: 30px;
}

.logo-main {
    font-weight: 900;
    font-size: 22px;
}

.logo-sub {
    background: linear-gradient(90deg, #a855f7, #0ea5e9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
}

.btn-back {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 14px;
}

/* Title */
.page-title {
    font-size: 26px;
    margin-bottom: 8px;
    background: linear-gradient(90deg, #a855f7, #0ea5e9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-subtitle {
    color: var(--text-dim);
    font-size: 14px;
    margin-bottom: 25px;
}

/* ===================== */
/* PREMIUM GRID */
/* ===================== */

.premium-packages {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 30px;
}

.premium-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: 0.3s ease;
    backdrop-filter: blur(12px);
    position: relative;
    overflow: hidden;
}

/* Shine animation */
.premium-card::before {
    content: "";
    position: absolute;
    top: -120%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(120deg, transparent, rgba(168, 85, 247, 0.15), transparent);
    transform: rotate(25deg);
    transition: 0.7s;
}

.premium-card:hover::before {
    top: 120%;
}

.premium-card:hover {
    transform: translateY(-6px);
    border-color: var(--premium-purple);
    box-shadow: 0 0 25px rgba(168, 85, 247, 0.5);
}

/* Active */
.premium-card.active {
    border: 2px solid var(--premium-gold);
    box-shadow: 0 0 30px rgba(250, 204, 21, 0.6);
}

/* Image */
.uc-img-wrapper {
    width: 65px;
    height: 65px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.premium-card img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 0 12px rgba(168, 85, 247, 0.6));
}

/* Text */
.premium-card h3 {
    font-size: 16px;
    margin-bottom: 6px;
}

.premium-card p {
    background: linear-gradient(90deg, #a855f7, #0ea5e9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    font-size: 15px;
}

/* ===================== */
/* ORDER SUMMARY */
/* ===================== */

.order-summary {
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid var(--premium-purple);
    border-radius: 14px;
    padding: 18px;
    margin-bottom: 25px;
}

.sum-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 6px;
    font-size: 14px;
}

.val {
    font-weight: 900;
    color: var(--premium-gold);
}

/* ===================== */
/* BUTTON */
/* ===================== */

.btn-primary-lg {
    width: 100%;
    background: linear-gradient(90deg, #a855f7, #0ea5e9);
    color: #fff;
    border: none;
    padding: 18px;
    border-radius: 16px;
    font-weight: 900;
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
    box-shadow: 0 0 25px rgba(168, 85, 247, 0.5);
}

.btn-primary-lg:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 35px rgba(168, 85, 247, 0.8);
}

.btn-primary-lg:disabled {
    background: #1e293b;
    color: #475569;
    box-shadow: none;
    cursor: not-allowed;
}

/* Note */
.note {
    text-align: center;
    color: var(--text-dim);
    font-size: 12px;
    margin-top: 15px;
}