/* Базовые стили */
:root {
    --primary-color: #000000;
    --primary-light: #333333;
    --secondary-color: #666666;
    --light-gray: #f5f5f5;
    --medium-gray: #e0e0e0;
    --dark-gray: #8a8a8a;
    --white: #ffffff;
    --success-color: #00a86b;
    --warning-color: #ff9500;
    --error-color: #ff3b30;
    --border-radius: 12px;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--white);
    color: var(--primary-color);
    line-height: 1.6;
    font-weight: 400;
    min-height: 100vh;
}

/* Основной контейнер */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Шапка */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--medium-gray);
    margin-bottom: 32px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
}

.logo h1 {
    font-size: 24px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.header-info {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--secondary-color);
    font-size: 14px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--secondary-color);
}

.status-dot.connected { background: var(--success-color); }
.status-dot.monitoring { background: var(--warning-color); }
.status-dot.error { background: var(--error-color); }

/* Индикатор прогресса */
.progress-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
    padding: 0 20px;
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0.3;
    transition: var(--transition);
}

.progress-step.active {
    opacity: 1;
}

.step-number {
    width: 32px;
    height: 32px;
    border: 2px solid var(--medium-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

.progress-step.active .step-number {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: var(--white);
}

.step-label {
    font-size: 13px;
    color: var(--secondary-color);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.progress-line {
    width: 80px;
    height: 1px;
    background: var(--medium-gray);
    margin: 0 8px;
}

/* Экран */
.screen {
    display: none;
    flex: 1;
}

.screen.active {
    display: block;
    animation: fadeIn 0.4s ease-out;
}

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

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

.screen-icon {
    width: 80px;
    height: 80px;
    background: var(--light-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: var(--primary-color);
    font-size: 32px;
}

.screen-content h2 {
    font-size: 32px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.screen-description {
    text-align: center;
    color: var(--secondary-color);
    margin-bottom: 40px;
    font-size: 16px;
}

/* Форма */
.form-container {
    max-width: 400px;
    margin: 0 auto;
}

.input-group {
    margin-bottom: 24px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group input {
    width: 100%;
    padding: 16px;
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: var(--transition);
    background: var(--white);
    color: var(--primary-color);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.05);
}

.password-container {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--secondary-color);
    cursor: pointer;
    padding: 4px;
    font-size: 18px;
    transition: var(--transition);
}

.password-toggle:hover {
    color: var(--primary-color);
}

/* Кнопки */
.btn-primary {
    width: 100%;
    padding: 18px 24px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 32px;
}

.btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    padding: 14px 24px;
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 32px auto 0;
}

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

.btn-icon {
    width: 40px;
    height: 40px;
    border: 1px solid var(--medium-gray);
    border-radius: 8px;
    background: transparent;
    color: var(--primary-color);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.btn-icon:hover {
    border-color: var(--primary-color);
    background: var(--light-gray);
}

/* Сообщения */
.message-container {
    display: none;
    padding: 16px;
    border-radius: var(--border-radius);
    margin-top: 24px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
}

.message-container.success {
    background: rgba(0, 168, 107, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(0, 168, 107, 0.2);
}

.message-container.error {
    background: rgba(255, 59, 48, 0.1);
    color: var(--error-color);
    border: 1px solid rgba(255, 59, 48, 0.2);
}

/* Загрузка */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
}

.loader {
    width: 48px;
    height: 48px;
    border: 3px solid var(--light-gray);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

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

.loading-text {
    font-size: 16px;
    color: var(--primary-light);
    margin-bottom: 8px;
}

.loading-subtext {
    font-size: 14px;
    color: var(--secondary-color);
}

/* Карточки устройств */
.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 24px 0;
}

.device-card {
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    padding: 20px;
    transition: var(--transition);
    background: var(--white);
}

.device-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.device-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.device-card-icon {
    width: 40px;
    height: 40px;
    background: var(--light-gray);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 18px;
}

.device-card-info h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 2px;
}

.device-card-info p {
    font-size: 12px;
    color: var(--secondary-color);
    font-family: monospace;
}

.device-card-status {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 500;
}

.device-card-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 16px;
    padding: 12px 0;
    border-top: 1px solid var(--medium-gray);
    border-bottom: 1px solid var(--medium-gray);
}

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.detail-value {
    font-size: 13px;
    font-weight: 500;
    font-family: monospace;
}

.btn-select-device {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-select-device:hover {
    background: var(--primary-light);
}

/* Шапка устройства */
.device-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--medium-gray);
}

.device-title {
    display: flex;
    align-items: center;
    gap: 16px;
}

.device-icon {
    width: 56px;
    height: 56px;
    background: var(--light-gray);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary-color);
}

.device-title h2 {
    font-size: 24px;
    font-weight: 600;
    margin: 0 0 4px 0;
    text-align: left;
}

.device-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--secondary-color);
}

.device-actions {
    display: flex;
    gap: 8px;
}

/* Датчики */
.sensors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.sensor-card {
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    padding: 24px;
    transition: var(--transition);
    background: var(--white);
}

.sensor-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.sensor-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.sensor-icon {
    width: 48px;
    height: 48px;
    background: var(--light-gray);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--primary-color);
}

.sensor-info h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 2px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sensor-info p {
    font-size: 12px;
    color: var(--secondary-color);
}

.sensor-value {
    font-size: 48px;
    font-weight: 300;
    line-height: 1;
    margin-bottom: 8px;
    color: var(--primary-color);
    font-variant-numeric: tabular-nums;
}

.sensor-value.warning { color: var(--warning-color); }
.sensor-value.critical { color: var(--error-color); }

.sensor-unit {
    font-size: 14px;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* История данных */
.data-history {
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    padding: 24px;
    margin-bottom: 32px;
}

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

.history-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.time-range {
    font-size: 12px;
    color: var(--secondary-color);
    padding: 4px 8px;
    background: var(--light-gray);
    border-radius: 4px;
}

.history-placeholder {
    height: 200px;
    background: var(--light-gray);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--secondary-color);
}

.history-placeholder i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.3;
}

/* Информация об устройстве */
.device-info {
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    padding: 24px;
}

.device-info h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--light-gray);
}

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

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

.info-value {
    font-size: 14px;
    font-weight: 500;
    font-family: monospace;
}

.info-value.status {
    color: var(--success-color);
    font-weight: 600;
}

/* Пустые состояния */
.empty-state, .error-state, .no-data-message {
    text-align: center;
    padding: 60px 20px;
}

.empty-state i, .error-state i, .no-data-message i {
    font-size: 48px;
    margin-bottom: 20px;
    opacity: 0.3;
}

.empty-state h4, .error-state h4, .no-data-message h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.empty-state p, .error-state p, .no-data-message p {
    color: var(--secondary-color);
    font-size: 14px;
}

/* Подвал */
.app-footer {
    margin-top: 48px;
    padding-top: 24px;
    border-top: 1px solid var(--medium-gray);
}

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

.connection-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--secondary-color);
}

.timestamp {
    font-family: monospace;
    font-size: 14px;
    color: var(--secondary-color);
    letter-spacing: 1px;
}

/* Адаптивность */
@media (max-width: 768px) {
    .app-container {
        padding: 16px;
    }
    
    .app-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .progress-indicator {
        flex-direction: column;
        gap: 24px;
    }
    
    .progress-line {
        width: 1px;
        height: 40px;
    }
    
    .screen-content h2 {
        font-size: 24px;
    }
    
    .sensors-grid {
        grid-template-columns: 1fr;
    }
    
    .devices-grid {
        grid-template-columns: 1fr;
    }
    
    .device-header {
        flex-direction: column;
        gap: 16px;
    }
    
    .device-actions {
        align-self: flex-start;
    }
    
    .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .screen-content {
        padding: 0;
    }
    
    .screen-content h2 {
        font-size: 20px;
    }
    
    .sensor-value {
        font-size: 36px;
    }
}