/* ===== CSS Variables ===== */
:root {
    --primary-bg: hsl(220, 20%, 10%);
    --secondary-bg: hsl(220, 18%, 14%);
    --card-bg: hsl(220, 16%, 18%);
    --card-hover: hsl(220, 16%, 22%);

    --primary-accent: hsl(45, 100%, 55%);
    --secondary-accent: hsl(200, 100%, 60%);
    --success-color: hsl(140, 70%, 50%);
    --danger-color: hsl(0, 70%, 55%);

    --text-primary: hsl(0, 0%, 95%);
    --text-secondary: hsl(0, 0%, 70%);
    --text-muted: hsl(0, 0%, 50%);

    --border-color: hsl(220, 16%, 25%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Header ===== */
.header {
    background: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-accent), var(--secondary-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-accent);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-accent);
    border-radius: 2px;
}

.logout-btn {
    background: linear-gradient(135deg, var(--danger-color), hsl(0, 70%, 45%));
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.logout-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 0, 0, 0.3);
}

/* ===== Main Content ===== */
.main-content {
    padding: 2rem 0;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* ===== Game Banner ===== */
.game-banner {
    position: relative;
    height: 200px;
    border-radius: 16px;
    overflow: hidden;
    background: linear-gradient(135deg, hsl(220, 30%, 20%), hsl(220, 30%, 30%));
    box-shadow: var(--shadow-md);
}

.banner-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), rgba(0, 150, 255, 0.1));
}

.banner-content {
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.game-title {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-accent), var(--secondary-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
}

.game-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* ===== Section Cards ===== */
.section-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

/* ===== UID Input Section ===== */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.input-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.uid-input {
    background: var(--secondary-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    font-size: 16px;
    /* Fix for iOS auto-zoom */
    color: var(--text-primary);
    transition: var(--transition-fast);
    font-family: 'Inter', sans-serif;
}

.uid-input:focus {
    outline: none;
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.1);
}

.verify-btn {
    background: linear-gradient(135deg, var(--primary-accent), hsl(45, 100%, 45%));
    color: var(--primary-bg);
    border: none;
    border-radius: 12px;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.verify-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.verify-btn:active {
    transform: translateY(0);
}

.verify-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ===== Player Info ===== */
.player-info {
    margin-top: 1.5rem;
    animation: slideDown 0.3s ease;
}

.player-info.hidden {
    display: none;
}

.player-card {
    background: var(--secondary-bg);
    border: 2px solid var(--success-color);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.player-icon {
    font-size: 3rem;
    background: linear-gradient(135deg, var(--primary-accent), var(--secondary-accent));
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.player-details {
    flex: 1;
}

.player-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.player-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* ===== Packages Grid ===== */
.packages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.package-card {
    background: var(--secondary-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.package-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.05), rgba(0, 150, 255, 0.05));
    opacity: 0;
    transition: var(--transition-normal);
}

.package-card:hover {
    border-color: var(--primary-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.package-card:hover::before {
    opacity: 1;
}

.package-card.selected {
    border-color: var(--success-color);
    background: linear-gradient(135deg, rgba(0, 255, 100, 0.1), rgba(0, 200, 100, 0.1));
    box-shadow: 0 0 20px rgba(0, 255, 100, 0.3);
}

.package-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.package-image {
    width: 100px;
    height: 100px;
    object-fit: contain;
    margin-bottom: 0.75rem;
    filter: drop-shadow(0 4px 12px rgba(255, 215, 0, 0.3));
    transition: var(--transition-normal);
}

.package-card:hover .package-image {
    transform: scale(1.1);
    filter: drop-shadow(0 6px 16px rgba(255, 215, 0, 0.5));
}

.package-amount {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-accent);
    margin-bottom: 0.5rem;
}

.package-bonus {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--success-color);
    margin-bottom: 0.5rem;
}

.package-price {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.package-original {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: line-through;
    margin-top: 0.25rem;
}

/* ===== Payment Summary ===== */
.summary-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
}

.summary-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.summary-value {
    color: var(--text-primary);
    font-weight: 600;
}

.summary-value.price {
    color: var(--primary-accent);
    font-size: 1.25rem;
    font-weight: 800;
}

.summary-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.5rem 0;
}

.summary-row.total {
    padding: 1rem 0;
}

.checkout-btn {
    background: linear-gradient(135deg, var(--success-color), hsl(140, 70%, 40%));
    color: white;
    border: none;
    border-radius: 12px;
    padding: 1.25rem 2rem;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
    margin-top: 1rem;
}

.checkout-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.checkout-btn:active:not(:disabled) {
    transform: translateY(0);
}

.checkout-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ===== Footer ===== */
.footer {
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    margin-top: 4rem;
}

.footer-text {
    color: var(--text-secondary);
    font-weight: 500;
}

.footer-subtext {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* ===== Animations ===== */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 12px;
    }

    .header-content {
        flex-direction: column;
        gap: 0.75rem;
        padding: 0 12px;
    }

    .nav {
        gap: 0.75rem;
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    .main-content {
        padding: 1rem 0;
        gap: 1rem;
    }

    .game-banner {
        height: 150px;
        border-radius: 12px;
    }

    .game-title {
        font-size: 1.75rem;
    }

    .game-subtitle {
        font-size: 0.9rem;
    }

    .section-card {
        padding: 1.25rem;
        border-radius: 12px;
    }

    .packages-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 0.75rem;
    }

    .package-card {
        padding: 1rem;
    }

    .package-amount {
        font-size: 1.25rem;
    }

    .logo-text {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .packages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .package-image {
        width: 70px;
        height: 70px;
    }
}