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

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --accent-blue: #0088cc;
    --accent-blue-hover: #0099dd;
    --warning-red: #ff4444;
    --success-green: #44ff44;
    --border-color: #333333;
}

body.dark-theme {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
}

/* Контейнер приложения */
.app-container {
    max-width: 600px;
    margin: 0 auto;
    min-height: 100vh;
    background-color: var(--bg-primary);
}

/* Header */
.app-header {
    background-color: var(--bg-secondary);
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    font-size: 24px;
}

.logo-text {
    font-size: 20px;
    font-weight: 600;
}

.menu-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
    padding: 4px 8px;
    position: absolute;
    right: 0;
}

/* Main Content */
.main-content {
    padding: 20px 16px;
    padding-bottom: 100px;
}

/* Balance Section */
.balance-section {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.section-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-secondary);
    text-align: center;
}

.balance-amount {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    text-align: center;
}

.balance-amount.negative {
    color: var(--warning-red);
}

.warning-message {
    background-color: rgba(255, 68, 68, 0.1);
    border-left: 3px solid var(--warning-red);
    padding: 12px;
    margin-bottom: 16px;
    border-radius: 4px;
    color: var(--warning-red);
    font-size: 14px;
}

.balance-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.action-btn {
    flex: 1;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s;
}

.action-btn:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-blue);
}

.btn-icon {
    font-size: 18px;
}

.topup-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-hover) 100%);
    border: none;
    color: white;
    padding: 16px;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
    transition: transform 0.2s;
}

.topup-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 136, 204, 0.4);
}

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

.change-tariff-btn {
    width: 100%;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 14px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
    transition: all 0.2s;
}

.change-tariff-btn:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-blue);
}

.tariff-info {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

/* Referral Section */
.referral-section {
    background: linear-gradient(135deg, #2a1a0a 0%, #3a2a1a 100%);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.referral-gift-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 16px;
}

.referral-gift-icon {
    font-size: 80px;
    display: block;
    text-align: center;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

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

.referral-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
}

.referral-description {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 16px;
}

.referral-stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 16px;
    padding: 12px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 18px;
    font-weight: 600;
    color: var(--accent-blue);
}

.referral-actions {
    display: flex;
    gap: 12px;
}

.referral-btn {
    flex: 1;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s;
}

.referral-btn:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-blue);
}

/* VPN Section */
.vpn-section {
    background-color: var(--bg-secondary);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 24px;
}

.vpn-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.vpn-btn {
    background-color: var(--accent-blue);
    border: none;
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
}

/* Login Page */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-radius: 20px;
    padding: 40px 32px;
    max-width: 400px;
    width: 100%;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.logo-section {
    text-align: center;
    margin-bottom: 32px;
}

.logo-section h1 {
    font-size: 32px;
    margin-bottom: 8px;
}

.logo-section p {
    color: var(--text-secondary);
    font-size: 14px;
}

.login-content h2 {
    font-size: 24px;
    margin-bottom: 8px;
    text-align: center;
}

.login-content > p {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 14px;
}

#telegram-login-container {
    margin-bottom: 24px;
}

.telegram-login-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-hover) 100%);
    border: none;
    color: white;
    padding: 16px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
}

.telegram-login-btn:hover {
    transform: translateY(-2px);
}

.info-text {
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
}

.info-text p {
    margin: 4px 0;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--bg-secondary);
    border-radius: 16px;
    padding: 24px;
    max-width: 400px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h3 {
    font-size: 20px;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 28px;
    cursor: pointer;
    line-height: 1;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.amount-input-group {
    margin-bottom: 20px;
}

.amount-input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 14px;
}

.amount-input {
    width: 100%;
    padding: 12px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 18px;
}

.quick-amounts {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.quick-amount-btn {
    flex: 1;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.quick-amount-btn:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-blue);
}

.submit-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-hover) 100%);
    border: none;
    color: white;
    padding: 16px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
}

/* Subscription List */
.subscription-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.subscription-option {
    width: 100%;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.subscription-option:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 136, 204, 0.2);
}

.subscription-option:active {
    transform: translateY(0);
}

.subscription-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.subscription-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.subscription-price {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent-blue);
}

.subscription-option.trial-option {
    background: linear-gradient(135deg, #2a1a0a 0%, #3a2a1a 100%);
    border-color: #ffaa00;
}

.subscription-option.crossed-option {
    opacity: 0.6;
}

.crossed-price {
    text-decoration: line-through;
    color: var(--text-secondary);
    margin-right: 8px;
}

/* Subscription Summary */
.subscription-summary {
    background-color: var(--bg-tertiary);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.summary-item:last-child {
    margin-bottom: 0;
}

.summary-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.summary-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Payment Methods */
.payment-methods-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.payment-method-btn {
    width: 100%;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.payment-method-btn:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 136, 204, 0.2);
}

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

.payment-method-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.payment-method-icon {
    font-size: 32px;
}

.payment-method-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.payment-method-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.payment-method-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Disabled Subscription Option */
.subscription-option.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.subscription-option.disabled:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--border-color);
}

/* Success Modal */
.success-content {
    text-align: center;
    padding: 20px;
}

.success-icon {
    font-size: 64px;
    margin-bottom: 16px;
}

.success-message {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.success-expires {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.success-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-hover) 100%);
    border: none;
    color: white;
    padding: 16px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
}

.success-btn:hover {
    transform: translateY(-2px);
}

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

/* History */
.history-list {
    max-height: 400px;
    overflow-y: auto;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

.history-item:last-child {
    border-bottom: none;
}

.history-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.history-amount {
    font-size: 16px;
    font-weight: 600;
}

.history-amount.positive {
    color: var(--success-green);
}

.history-amount.negative {
    color: var(--warning-red);
}

.history-description {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.history-date {
    font-size: 12px;
    color: var(--text-secondary);
}

.history-status {
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
}

.status-completed {
    color: var(--success-green);
}

.status-pending {
    color: #ffaa00;
}

.status-failed {
    color: var(--warning-red);
}

.empty-history {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px 20px;
}

/* Responsive */
@media (max-width: 480px) {
    .balance-amount {
        font-size: 36px;
    }
    
    .referral-stats {
        flex-direction: column;
        gap: 12px;
    }
}