* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
}

header h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

header .subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.card h2 {
    font-size: 1.25rem;
    margin-bottom: 16px;
    color: var(--text-primary);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 8px;
}

.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
}

.input-group input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-icon {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-icon:hover {
    background-color: var(--bg-color);
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-primary:disabled {
    background-color: var(--secondary-color);
    cursor: not-allowed;
}

.btn-secondary {
    background-color: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--border-color);
}

.btn-danger {
    background-color: var(--error-color);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.balance-info, .price-info {
    padding: 12px;
    background-color: var(--bg-color);
    border-radius: 8px;
    margin-bottom: 16px;
    font-weight: 500;
}

#balance {
    color: var(--success-color);
    font-weight: 700;
}

#price {
    color: var(--primary-color);
    font-weight: 700;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background-color: white;
    cursor: pointer;
    transition: border-color 0.2s;
}

.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Order Card */
.order-card {
    background-color: var(--bg-color);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 12px;
    border-left: 4px solid var(--primary-color);
}

.order-card.received {
    border-left-color: var(--success-color);
}

.order-card.cancelled {
    border-left-color: var(--error-color);
}

.order-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.order-phone {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: monospace;
}

.order-status {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.order-status.pending {
    background-color: #fef3c7;
    color: #92400e;
}

.order-status.received {
    background-color: #d1fae5;
    color: #065f46;
}

.order-status.cancelled {
    background-color: #fee2e2;
    color: #991b1b;
}

.order-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.order-details span {
    color: var(--text-secondary);
}

.order-otp {
    background-color: var(--success-color);
    color: white;
    padding: 12px;
    border-radius: 8px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: monospace;
    letter-spacing: 4px;
    margin-bottom: 12px;
}

.order-actions {
    display: flex;
    gap: 10px;
}

.order-actions button {
    flex: 1;
    padding: 8px 16px;
    font-size: 0.9rem;
}

/* History Item */
.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background-color: var(--bg-color);
    border-radius: 8px;
    margin-bottom: 8px;
}

.history-info {
    display: flex;
    flex-direction: column;
}

.history-phone {
    font-weight: 600;
    font-family: monospace;
}

.history-service {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.history-otp {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--success-color);
    font-family: monospace;
    letter-spacing: 2px;
}

.copy-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 5px;
}

.copy-btn:hover {
    transform: scale(1.1);
}

/* Status Message */
.status-message {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    z-index: 1000;
    animation: slideUp 0.3s ease;
}

.status-message.success {
    background-color: var(--success-color);
    color: white;
}

.status-message.error {
    background-color: var(--error-color);
    color: white;
}

.status-message.info {
    background-color: var(--primary-color);
    color: white;
}

.status-message.hidden {
    display: none;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.no-orders, .no-history {
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
}

/* Loading Spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #ffffff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
    margin-right: 8px;
}

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

/* Responsive */
@media (max-width: 600px) {
    .container {
        padding: 10px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .order-details {
        grid-template-columns: 1fr;
    }

    .order-actions {
        flex-direction: column;
    }
}

/* Countdown Timer Styles */
.countdown-timer {
    font-family: monospace;
    font-size: 1.2rem;
    color: #1f2937;
}

.countdown-display {
    grid-column: span 2;
    background-color: #e0f2fe;
    color: #0369a1;
    padding: 10px 12px;
    border-radius: 6px;
    text-align: center;
    border: 2px solid #0ea5e9;
    font-weight: 600;
}

/* Cancel Wait Warning */
.cancel-wait-warning {
    grid-column: span 2;
    background-color: #fef3c7;
    color: #92400e;
    padding: 10px 12px;
    border-radius: 6px;
    text-align: center;
    font-size: 0.95rem;
    font-weight: 500;
    border: 1px solid #f59e0b;
}

/* Auto Cancel Failed Warning */
.auto-cancel-failed {
    grid-column: span 2;
    background-color: #fee2e2;
    color: #991b1b;
    padding: 12px;
    border-radius: 6px;
    text-align: center;
    font-weight: 600;
    font-size: 0.95rem;
    animation: pulse 1.5s infinite;
    border: 2px solid #ef4444;
}

.order-card.cancel-failed {
    border-left-color: #f59e0b;
    background-color: #fffbeb;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

/* Disabled button style */
.btn-danger:disabled {
    background-color: #9ca3af;
    cursor: not-allowed;
    opacity: 0.6;
}