/* ============================================
   SMY Management System - Glassmorphism Styles
   ============================================ */

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

/* CSS Variables */
:root {
    /* Colors */
    --primary-color: #1890ff;
    --error-color: #fca5a5;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-blur: blur(10px);
    
    /* Spacing */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* Body & Background */
body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

/* Glassmorphism Card */
.card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #ffffff;
}

.btn-primary:hover {
    background: #40a9ff;
    border-color: #40a9ff;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* Form Inputs */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 14px;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    transition: all var(--transition-fast);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.15);
}

/* Error Message */
.error-message {
    color: var(--error-color);
    font-size: 14px;
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: var(--radius-sm);
    text-align: center;
    display: none;
}

.error-message.show {
    display: block;
}

/* Sidebar */
.sidebar {
    width: 240px;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--glass-border);
    padding: var(--spacing-lg);
}

.sidebar-nav {
    list-style: none;
    margin-top: var(--spacing-xl);
}

.sidebar-nav-item {
    margin-bottom: var(--spacing-sm);
}

.sidebar-nav-link {
    display: block;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.sidebar-nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.sidebar-nav-link.active {
    background: var(--primary-color);
    color: #ffffff;
}

/* Main Content Area */
.main-content {
    margin-left: 240px;
    padding: var(--spacing-xl);
}

/* Top Navigation Bar */
.topbar {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar-title {
    font-size: 20px;
    font-weight: 600;
}

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

/* Statistics Number Display */
.stat-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: var(--spacing-xs);
}

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

.stat-icon {
    font-size: 24px;
    margin-right: var(--spacing-xs);
}

/* Environment Data Cards */
.env-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.env-card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

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

.env-value {
    font-size: 24px;
    font-weight: 700;
}

/* Toggle Switch (iOS Style) */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: var(--transition-normal);
    border-radius: 26px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    transition: var(--transition-normal);
    border-radius: 50%;
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--primary-color);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(24px);
}

/* Device Card */
.device-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.device-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.device-name {
    font-size: 16px;
    font-weight: 500;
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

/* Login Page Specific */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: var(--spacing-lg);
}

.login-card {
    width: 100%;
    max-width: 400px;
}

.login-title {
    text-align: center;
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--spacing-xl);
}

.login-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.login-buttons .btn {
    flex: 1;
}

/* Footer / Filing Information */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center;
    padding: var(--spacing-md);
    font-size: 12px;
    color: var(--text-muted);
    background: rgba(0, 0, 0, 0.1); /* Slight background for readability */
    backdrop-filter: blur(5px);
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-link {
    color: var(--text-muted);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--text-secondary);
}

.footer-icon {
    width: 16px;
    height: 16px;
    vertical-align: middle;
}

/* Loading Spinner */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #ffffff;
    animation: spin 0.8s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}

.btn-loading {
    pointer-events: none;
    opacity: 0.8;
    cursor: wait;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }