:root {
    --primary-green: #00C244;
    --dark-green: #009933;
    --deep-green: #007F2A;
    --light-green: #00D653;
    --bg-black: #000000;
    --white: #FFFFFF;
    --gray-text: #B3B3B3;
    --glass-bg: rgba(0, 0, 0, 0.15);
    --glass-border: rgba(255, 255, 255, 0.1);
    --error-color: #ff3b30;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-black);
    color: var(--white);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
    margin: 0;
}

/* Mobile Container Simulation */
.app-container {
    width: 100%;
    max-width: 420px;
    height: 850px;
    max-height: 100vh;
    background-color: var(--primary-green);
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (min-width: 450px) {
    .app-container {
        border-radius: 40px;
        max-height: 95vh;
        box-shadow: 0 20px 50px rgba(0, 194, 68, 0.3);
    }
}

.screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 24px;
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 1;
}

/* Header Components */
.header {
    text-align: center;
    margin-top: 20px;
    margin-bottom: 20px;
}

.header h1 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--white);
}

.badge-secure {
    background: var(--deep-green);
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 600;
    gap: 4px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Payment Method Card */
.method-card {
    background: var(--dark-green);
    border-radius: 24px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 40px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    border: 1px solid rgba(255,255,255,0.05);
}

.method-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-green);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.method-name {
    font-size: 16px;
    font-weight: 600;
}

.method-status {
    font-size: 12px;
    opacity: 0.7;
}

/* Amount Display */
.amount-container {
    text-align: center;
    margin-bottom: 40px;
}

.amount-display {
    font-size: 64px;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 8px;
}

.currency-label {
    font-size: 14px;
    font-weight: 500;
    opacity: 0.8;
    letter-spacing: 1px;
}

/* Keypad */
.keypad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin-top: auto;
    margin-bottom: 30px;
}

.key {
    height: 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 26px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 15px;
    transition: background 0.2s;
    user-select: none;
}

.key:active {
    background: rgba(255, 255, 255, 0.15);
    transform: scale(0.95);
}

/* Buttons */
.btn-pay {
    width: 100%;
    background: var(--deep-green);
    color: var(--white);
    border: none;
    border-radius: 20px;
    padding: 20px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    transition: transform 0.2s, background 0.2s;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.btn-pay:hover {
    background: #006a23;
}

.btn-pay:active {
    transform: scale(0.98);
}

/* Checkout Page Specific Styles */
.timer-badge {
    background: var(--deep-green);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0 auto 20px;
    display: inline-block;
}

.checkout-amount {
    font-size: 42px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 4px;
}

.checkout-subtitle {
    font-size: 12px;
    text-align: center;
    opacity: 0.8;
    margin-bottom: 24px;
}

.qr-section {
    background: var(--white);
    border-radius: 24px;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 24px;
    position: relative;
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
}

.qr-section canvas, .qr-section img {
    width: 220px !important;
    height: 220px !important;
}

.qr-center-logo {
    position: absolute;
    width: 44px;
    height: 44px;
    background: var(--primary-green);
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 0 0 5px white;
    z-index: 10;
}

.status-badge-awaiting {
    background: rgba(0,0,0,0.2);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin: 0 auto 24px;
}

.pulse {
    width: 8px;
    height: 8px;
    background: var(--white);
    border-radius: 50%;
    animation: pulse-animation 1.5s infinite;
}

@keyframes pulse-animation {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(255, 255, 255, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); }
}

.invoice-details {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 30px;
}

.detail-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-box {
    background: var(--deep-green);
    padding: 10px 14px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    margin-left: 15px;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.05);
}

.detail-value {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    opacity: 0.8;
}

.copy-btn {
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.copy-btn:hover { opacity: 1; }

/* Animations */
.loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Glass Glow Effect */
.glow {
    position: absolute;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(0, 214, 83, 0.4) 0%, rgba(0, 0, 0, 0) 70%);
    pointer-events: none;
    z-index: 0;
}

.glow-1 { top: -50px; left: -50px; }
.glow-2 { bottom: -50px; right: -50px; }

.fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Admin Premium Styles --- */

.admin-body {
    background-color: #080808;
    align-items: flex-start;
    padding: 0;
}

.admin-layout {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

.admin-sidebar {
    width: 260px;
    background: #121212;
    border-right: 1px solid var(--glass-border);
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.admin-main {
    flex: 1;
    padding: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.admin-nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--gray-text);
    text-decoration: none;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
}

.admin-nav-item:hover, .admin-nav-item.active {
    background: var(--glass-bg);
    color: var(--primary-green);
}

.admin-nav-item svg {
    width: 18px;
    height: 18px;
}

.admin-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.premium-card {
    background: #121212;
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 24px;
    transition: transform 0.3s, border-color 0.3s;
    position: relative;
    overflow: hidden;
}

.premium-card:hover {
    border-color: var(--primary-green);
    transform: translateY(-5px);
}

.premium-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle at top right, rgba(0, 194, 68, 0.05), transparent 70%);
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.stat-icon {
    width: 40px;
    height: 40px;
    background: rgba(0, 194, 68, 0.1);
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--primary-green);
}

.premium-table-container {
    background: #121212;
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    overflow: hidden;
}

.premium-table {
    width: 100%;
    border-collapse: collapse;
}

.premium-table th {
    background: rgba(255, 255, 255, 0.02);
    padding: 16px 24px;
    text-align: left;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gray-text);
    border-bottom: 1px solid var(--glass-border);
}

.premium-table td {
    padding: 16px 24px;
    font-size: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
    color: var(--white);
}

.premium-table tr:hover {
    background: rgba(255, 255, 255, 0.01);
}

.status-pill {
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
}

.status-pill.pending { background: rgba(255, 159, 10, 0.1); color: #ff9f0a; }
.status-pill.paid { background: rgba(0, 194, 68, 0.1); color: var(--primary-green); }
.status-pill.expired { background: rgba(255, 59, 48, 0.1); color: #ff3b30; }

.login-premium-container {
    width: 100%;
    max-width: 400px;
    background: #121212;
    border: 1px solid var(--glass-border);
    border-radius: 32px;
    padding: 40px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.5);
    text-align: center;
}

.input-premium {
    width: 100%;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 14px 16px;
    color: white;
    font-size: 15px;
    margin-bottom: 20px;
    transition: all 0.3s;
}

.input-premium:focus {
    outline: none;
    border-color: var(--primary-green);
    background: rgba(255,255,255,0.05);
}