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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 400px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

header {
    text-align: center;
    margin-bottom: 30px;
    color: white;
}

header h1 {
    font-size: 28px;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

header p {
    font-size: 16px;
    opacity: 0.9;
}

.exchange-form {
    background: white;
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    margin-bottom: 20px;
}

.currency-section {
    margin-bottom: 20px;
}

.currency-section h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: #555;
}

.currency-selector {
    margin-bottom: 10px;
}

.currency-select {
    width: 100%;
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 12px;
    font-size: 16px;
    background: white;
    transition: border-color 0.3s ease;
}

.currency-select:focus {
    outline: none;
    border-color: #667eea;
}

.currency-select option {
    padding: 10px;
}

.amount-input input {
    width: 100%;
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 600;
    transition: border-color 0.3s ease;
}

.amount-input input:focus {
    outline: none;
    border-color: #667eea;
}

.amount-input input[readonly] {
    background-color: #f8f9fa;
    color: #667eea;
}


.exchange-info {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 20px;
}

.rate-info {
    font-size: 14px;
    color: #666;
    margin-bottom: 8px;
}

.fee-info {
    font-size: 14px;
    color: #28a745;
    font-weight: 600;
}

.exchange-button {
    width: 100%;
    padding: 18px;
    border: none;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.4);
}

.exchange-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.6);
}

.exchange-button:disabled {
    background: #6c757d;
    cursor: not-allowed;
    box-shadow: none;
}


/* Адаптивность */
@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    
    header h1 {
        font-size: 24px;
    }
    
    .exchange-form {
        padding: 20px;
    }
    
    .currency-select, .amount-input input {
        padding: 12px;
        font-size: 16px;
    }
}

/* Анимации */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.exchange-form {
    animation: fadeIn 0.6s ease-out;
}

/* Стили для Telegram WebApp */
.tg-viewport {
    background: transparent;
}

/* Стили модального окна */
.modal {
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    box-sizing: border-box;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.show {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
}

.modal-content {
    background: white;
    border-radius: 16px;
    width: 100%;
    max-width: 400px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 24px 16px 24px;
    border-bottom: 1px solid #f0f0f0;
}

.modal-header h3 {
    margin: 0;
    color: #1a1a1a;
    font-size: 20px;
    font-weight: 600;
}

.close {
    color: #999;
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
    padding: 4px;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.close:hover {
    color: #333;
    background: #f5f5f5;
}

.modal-body {
    padding: 24px;
}

.modal-body p {
    margin-bottom: 20px;
    color: #666;
    font-size: 16px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
    font-size: 15px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    background: #f5f5f5;
    transition: all 0.3s ease;
    box-sizing: border-box;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    background: #e8f0fe;
    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.exchange-summary {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 15px;
    margin-top: 20px;
}

.exchange-summary h4 {
    margin: 0 0 10px 0;
    color: #333;
    font-size: 16px;
}

.exchange-summary div {
    color: #666;
    font-size: 14px;
    line-height: 1.5;
}

.modal-footer {
    padding: 16px 24px 24px 24px;
    display: flex;
    gap: 12px;
}

.btn-back,
.btn-create {
    flex: 1;
    padding: 16px 20px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
}

.btn-back {
    background: white;
    color: #666;
    border: 1px solid #e0e0e0;
}

.btn-back:hover {
    background: #f8f9fa;
    border-color: #d0d0d0;
}

.btn-create {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-create:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-submit:disabled {
    background: #6c757d;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Адаптивность для модального окна */
@media (max-width: 480px) {
    .modal-content {
        width: 95%;
        margin: 20px;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 15px 20px;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .btn-cancel,
    .btn-submit {
        width: 100%;
    }
}