:root {
    --tg-theme-bg-color: #ffffff;
    --tg-theme-text-color: #000000;
    --tg-theme-hint-color: #999999;
    --tg-theme-link-color: #2481cc;
    --tg-theme-button-color: #2481cc;
    --tg-theme-button-text-color: #ffffff;
    --tg-theme-secondary-bg-color: #f4f4f5;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    line-height: 1.6;
    padding: 0;
    margin: 0;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    font-size: 24px;
    margin-bottom: 20px;
    text-align: center;
    color: var(--tg-theme-text-color);
}

/* Табы */
.tabs {
    display: flex;
    gap: 5px;
    margin-bottom: 20px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tab-button {
    flex: 1;
    min-width: 120px;
    padding: 12px 16px;
    background-color: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.tab-button:hover {
    opacity: 0.8;
}

.tab-button.active {
    background-color: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
}

/* Контент табов */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

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

/* Формы */
.form {
    background-color: var(--tg-theme-bg-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--tg-theme-text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    background-color: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--tg-theme-button-color);
}

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

/* Кнопка отправки */
.btn-submit {
    width: 100%;
    padding: 14px;
    background-color: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.btn-submit:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

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

.btn-submit:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Уведомления */
.notification {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 16px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    display: none;
    max-width: 90%;
    animation: slideDown 0.3s ease;
}

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

.notification.show {
    display: block;
}

.notification.success {
    background-color: #4caf50;
    color: white;
}

.notification.error {
    background-color: #f44336;
    color: white;
}

/* Адаптивность */
@media (max-width: 480px) {
    .container {
        padding: 15px;
    }

    h1 {
        font-size: 20px;
    }

    .tab-button {
        min-width: 100px;
        padding: 10px 12px;
        font-size: 13px;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px; /* Предотвращает зум на iOS */
    }
}

/* Темная тема */
@media (prefers-color-scheme: dark) {
    :root {
        --tg-theme-bg-color: #212121;
        --tg-theme-text-color: #ffffff;
        --tg-theme-hint-color: #aaaaaa;
        --tg-theme-secondary-bg-color: #2c2c2c;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        border-color: #404040;
    }
}