/* === vROps Alert Manager — Dark Theme === */

:root {
    /* Colors — Refined Dark Palette */
    --bg-primary: #07070e;
    --bg-secondary: #0d0d1f;
    --bg-card: rgba(20, 20, 35, 0.6);
    --bg-hover: rgba(100, 255, 218, 0.05);
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --accent: #64ffda;
    --accent-glow: rgba(100, 255, 218, 0.3);
    --accent-hover: #4dd8b5;
    --danger: #ff5555;
    --warning: #fbbf24;
    --success: #10b981;
    --border: rgba(255, 255, 255, 0.08);
    --border-light: rgba(255, 255, 255, 0.15);
    
    /* Spacing & Sizing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    
    /* Typography */
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    
    /* Effects — Enhanced Depth */
    --radius: 16px;
    --radius-lg: 24px;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 12px 20px -8px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    --glass: blur(16px);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-bg: radial-gradient(circle at top right, #1a1a3a, #07070e);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    background-image: var(--gradient-bg);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { 
    background: var(--border-light); 
    border-radius: 10px;
    border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* Sidebar */
.sidebar {
    width: 280px;
    background: rgba(13, 13, 31, 0.8);
    padding: var(--space-lg) 0;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
    position: fixed;
    height: 100vh;
    z-index: 50;
    backdrop-filter: var(--glass);
}
.logo {
    padding: 0 var(--space-lg) var(--space-xl);
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    letter-spacing: -0.04em;
    text-shadow: 0 0 20px var(--accent-glow);
}
.sidebar ul { list-style: none; flex: 1; }
.sidebar li { margin: 4px 16px; border-radius: 12px; overflow: hidden; }
.sidebar li a {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}
.sidebar li a i { font-size: 1.1rem; transition: var(--transition); }
.sidebar li a:hover,
.sidebar li.active a {
    color: var(--accent);
    background: var(--bg-hover);
}
.sidebar li.active a i { transform: scale(1.1); }
.sidebar-footer { padding: var(--space-lg); border-top: 1px solid var(--border); }

/* Main Content */
.content {
    margin-left: 280px;
    padding: var(--space-xl);
    flex: 1;
    max-width: 1400px;
    animation: fadeIn 0.6s ease-out;
}
.content header { margin-bottom: var(--space-xl); }
.content h1 { 
    font-size: 2.25rem; 
    font-weight: 800; 
    letter-spacing: -0.05em;
    background: linear-gradient(to bottom right, #fff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Cards — Enhanced Glassmorphism */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    backdrop-filter: var(--glass);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-light), transparent);
}
.card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-glow);
    transform: translateY(-2px);
}
.card h3 { 
    color: var(--accent); 
    margin-bottom: var(--space-md); 
    font-weight: 700; 
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* Stats Grid — Bento Inspired */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}
.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: var(--space-xl);
    border: 1px solid var(--border);
    text-align: center;
    backdrop-filter: var(--glass);
    transition: var(--transition);
    border-top: 1px solid var(--border-light);
}
.stat-card:hover {
    transform: scale(1.02);
    border-color: var(--accent);
    box-shadow: 0 0 30px rgba(100, 255, 218, 0.1);
}
.stat-card .value {
    font-size: 3rem;
    font-weight: 900;
    color: var(--accent);
    line-height: 1;
    text-shadow: 0 0 20px var(--accent-glow);
}
.stat-card .label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: var(--space-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Table */
table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
th {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.85em;
    text-transform: uppercase;
}
tr:hover { background: var(--bg-hover); }

/* code */
code {
    font-family: 'Courier New', monospace;
    font-size: 0.85em;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}
.badge-success { background: rgba(16, 185, 129, 0.1); color: var(--success); border: 1px solid rgba(16, 185, 129, 0.2); }
.badge-danger { background: rgba(255, 85, 85, 0.1); color: var(--danger); border: 1px solid rgba(255, 85, 85, 0.2); }
.badge-warning { background: rgba(251, 191, 36, 0.1); color: var(--warning); border: 1px solid rgba(251, 191, 36, 0.2); }

/* Buttons — Sleek & Vibrant */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 12px 24px;
    border: 1px solid transparent;
    border-radius: 12px;
    cursor: pointer;
    font-family: inherit;
    font-size: var(--text-sm);
    font-weight: 700;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}
.btn-primary { 
    background: var(--accent); 
    color: var(--bg-primary); 
    box-shadow: 0 8px 16px rgba(100, 255, 218, 0.2);
}
.btn-primary:hover { 
    background: var(--accent-hover); 
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(100, 255, 218, 0.3);
}
.btn-danger { 
    background: rgba(255, 85, 85, 0.1); 
    color: var(--danger);
    border-color: rgba(255, 85, 85, 0.2);
}
.btn-danger:hover { 
    background: var(--danger); 
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(255, 85, 85, 0.3);
}
.btn-sm { padding: var(--space-xs) var(--space-sm); font-size: var(--text-xs); }

/* Forms */
input, select, textarea {
    background: rgba(10, 10, 18, 0.5);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: var(--space-sm) var(--space-md);
    border-radius: 8px;
    font-family: inherit;
    font-size: var(--text-sm);
    width: 100%;
    transition: var(--transition);
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(10, 10, 18, 0.8);
    box-shadow: 0 0 0 2px rgba(100, 255, 218, 0.1);
}
.form-group { margin-bottom: var(--space-md); }
.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    color: var(--text-secondary);
    font-size: var(--text-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    z-index: 100;
    justify-content: center;
    align-items: center;
}
.modal-overlay.active { display: flex; }
.modal {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 32px;
    width: 480px;
    max-width: 90%;
    border: 1px solid var(--border);
    max-height: 90vh;
    overflow-y: auto;
}
.modal h2 { margin-bottom: 20px; }
.modal-actions { display: flex; gap: 12px; justify-content: flex-end; margin-top: 24px; }

/* Login page */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    width: 100%;
}
.login-box {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 40px;
    width: 400px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}
.login-box h1 {
    color: var(--accent);
    margin-bottom: 8px;
    font-size: 1.4em;
}
.login-box p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 0.9em;
}
.alert-error {
    background: rgba(255,107,107,0.12);
    color: var(--danger);
    border: 1px solid rgba(255,107,107,0.3);
    padding: 10px 14px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.9em;
}

/* ── 設定頁 ── */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 0 24px;
}

/* 通知方塊（notice-box） */
.notice-box {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.9em;
    line-height: 1.5;
    margin-top: 12px;
}
.notice-box i { margin-top: 2px; flex-shrink: 0; }
.notice-warning {
    background: rgba(255,217,61,0.10);
    border: 1px solid rgba(255,217,61,0.30);
    color: var(--warning);
}
.notice-info {
    background: rgba(100,255,218,0.07);
    border: 1px solid rgba(100,255,218,0.20);
    color: var(--accent);
}
.notice-success {
    background: rgba(107,203,119,0.10);
    border: 1px solid rgba(107,203,119,0.30);
    color: var(--success);
}
.notice-box code {
    background: rgba(255,255,255,0.10);
    padding: 1px 6px;
    border-radius: 4px;
}

/* 外撥後端選擇器 */
.backend-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}
.backend-option {
    padding: 24px 20px;
    border-radius: var(--radius);
    border: 2px solid var(--border);
    cursor: pointer;
    text-align: center;
    transition: all 0.2s;
    color: var(--text-secondary);
    position: relative;
}
.backend-option:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    background: rgba(100,255,218,0.04);
}
.backend-option.active {
    border-color: var(--accent);
    background: rgba(100,255,218,0.08);
    color: var(--accent);
}
.backend-option-title {
    font-size: 1.1em;
    font-weight: 600;
    margin-top: 12px;
}
.backend-option-desc {
    font-size: 0.8em;
    margin-top: 6px;
    line-height: 1.5;
    color: var(--text-secondary);
}
.backend-badge {
    display: inline-block;
    margin-top: 10px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75em;
    font-weight: 600;
    background: rgba(107,203,119,0.15);
    color: var(--success);
}

/* 停用中的設定區塊 */
.section-inactive {
    opacity: 0.4;
    position: relative;
}
.section-inactive::after {
    content: "停用中";
    position: absolute;
    top: 16px;
    right: 20px;
    background: rgba(255,107,107,0.15);
    color: var(--danger);
    font-size: 0.78em;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 20px;
    pointer-events: none;
}

/* Toggle 開關 */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
    flex-shrink: 0;
    cursor: pointer;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-switch .slider {
    position: absolute;
    inset: 0;
    background: var(--bg-hover);
    border-radius: 26px;
    transition: 0.3s;
    border: 1px solid var(--border);
}
.toggle-switch .slider:before {
    content: "";
    position: absolute;
    width: 18px; height: 18px;
    left: 3px; bottom: 3px;
    background: var(--text-secondary);
    border-radius: 50%;
    transition: 0.3s;
}
.toggle-switch input:checked + .slider { background: rgba(100,255,218,0.20); border-color: var(--accent); }
.toggle-switch input:checked + .slider:before {
    background: var(--accent);
    transform: translateX(22px);
}

/* Settings Tabs */
.tabs-container {
    margin-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border);
}
.settings-tabs {
    display: flex;
    gap: var(--space-md);
}
.tab-btn {
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    padding: var(--space-md) var(--space-lg);
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-size: var(--text-sm);
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}
.settings-panel { display: none; }
.settings-panel.active { display: block; animation: fadeIn 0.3s ease-out; }

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

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.shimmer {
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

/* Glass Card */
.glass-card {
    background: rgba(22, 33, 62, 0.9);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Toast Notifications */
#toast-container {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}
.toast {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    backdrop-filter: var(--glass);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    transform: translateX(120%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 300px;
}
.toast.show { transform: translateX(0); }
.toast i { color: var(--accent); font-size: 1.25rem; }
.toast.error i { color: var(--danger); }
.toast span { font-size: var(--text-sm); font-weight: 500; }

/* Pulse Indicator */
.value { position: relative; }
.pulse-indicator {
    position: absolute;
    top: -4px;
    right: -10px;
    width: 12px;
    height: 12px;
    background: var(--danger);
    border-radius: 50%;
    display: none;
    box-shadow: 0 0 0 rgba(255, 85, 85, 0.7);
    animation: pulse 1.5s infinite;
}
@keyframes pulse {
    0% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(255, 85, 85, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(255, 85, 85, 0); }
    100% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(255, 85, 85, 0); }
}

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); transition: var(--transition); }
    .sidebar.active { transform: translateX(0); }
    .content { margin-left: 0; padding: var(--space-md); }
    .stats-grid { grid-template-columns: 1fr; }
    #toast-container { left: var(--space-md); right: var(--space-md); bottom: var(--space-md); }
}