/* =====================================================
   資料中心管理系統 - Cyan Neon Theme (Slate 950)
   ===================================================== */

/* === Reset & Variables === */
:root {
    --bg-primary: #0b1120;     /* Slate 950 */
    --bg-secondary: #0f172a;   /* Slate 900 */
    --bg-card: rgba(15, 23, 42, 0.8);
    --bg-hover: rgba(30, 41, 59, 0.8);
    
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #475569;
    
    --color-cyan: #22d3ee;
    --color-cyan-glow: rgba(34, 211, 238, 0.3);
    --color-emerald: #10b981;
    --color-rose: #f43f5e;
    --color-amber: #fbbf24;
    --color-purple: #a855f7;

    --border-color: rgba(30, 41, 59, 0.8);
    
    --sidebar-width: 240px;
    --header-height: 70px;
    --footer-height: 50px;
    --radius: 12px;

    --font-ui: "Noto Sans TC", sans-serif;
    --font-tech: "Orbitron", sans-serif;
}

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

body {
    font-family: var(--font-ui);
    background-color: var(--bg-primary);
    background-image: radial-gradient(circle at 50% 0%, #1e293b 0%, #0b1120 70%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 14px;
    height: 100vh;
    overflow: hidden;
}

.tech-font { font-family: var(--font-tech); }

/* === App Layout === */
.app-container { 
    display: flex; 
    width: 100vw; 
    height: 100vh; 
}

/* === Sidebar === */
.sidebar {
    width: var(--sidebar-width); 
    background: rgba(11, 17, 32, 0.95);
    border-right: 1px solid var(--border-color);
    display: flex; 
    flex-direction: column;
    height: 100vh;
    flex-shrink: 0;
    z-index: 100;
    backdrop-filter: blur(16px);
}

.sidebar-header { padding: 24px 20px; border-bottom: 1px solid rgba(255,255,255,0.05); }
.sidebar-header h2 { font-size: 20px; font-family: var(--font-tech); color: var(--color-cyan); }

.sidebar-nav { flex: 1; padding: 20px 0; overflow-y: auto; }
.sidebar-nav li a {
    display: flex; align-items: center; padding: 12px 24px; gap: 15px;
    color: var(--text-secondary); transition: all 0.3s; text-decoration: none;
    border-left: 3px solid transparent;
}
.sidebar-nav li.active a { 
    background: rgba(34, 211, 238, 0.1); 
    color: var(--color-cyan); 
    border-left-color: var(--color-cyan);
    text-shadow: 0 0 10px var(--color-cyan-glow);
}

.sidebar-footer { padding: 20px; border-top: 1px solid rgba(255,255,255,0.05); }

/* === Main Content Area === */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    min-width: 0;
}

.main-header {
    height: var(--header-height);
    padding: 0 32px;
    background: rgba(11, 17, 32, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(34, 211, 238, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.content-area {
    flex: 1;
    padding: 24px;
    overflow: hidden; /* Important: Internal scrolling only */
    display: flex;
    flex-direction: column;
}

.main-footer {
    height: var(--footer-height);
    padding: 0 32px;
    border-top: 1px solid rgba(255,255,255,0.05);
    background: rgba(11, 17, 32, 0.8);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

/* === VMS Module Layout === */
.vms-layout {
    display: flex;
    gap: 24px;
    height: 100%; /* Fill content-area */
    min-height: 0;
}

.vms-main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-width: 0;
}

.vms-player-section { flex-shrink: 0; margin-bottom: 20px; }
.player-container { aspect-ratio: 16/9; background: #000; border-radius: 12px; overflow: hidden; }

.vms-grid-section {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
    overflow-y: auto;
    padding-right: 8px;
}

.vms-sidebar-section {
    width: 320px;
    height: 100%;
    flex-shrink: 0;
}

/* Custom Scrollbar for Neon Look */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(34, 211, 238, 0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(34, 211, 238, 0.3); }

/* === Components === */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
}

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 8px 16px; border-radius: 8px; font-weight: 600; cursor: pointer;
    transition: all 0.3s; border: 1px solid transparent;
}
.btn-primary { background: rgba(34, 211, 238, 0.1); color: var(--color-cyan); border-color: rgba(34, 211, 238, 0.3); }
.btn-primary:hover { background: rgba(34, 211, 238, 0.2); border-color: var(--color-cyan); box-shadow: 0 0 15px var(--color-cyan-glow); }
.btn-secondary { background: rgba(255,255,255,0.05); color: var(--text-secondary); border-color: rgba(255,255,255,0.1); }

.form-control {
    width: 100%; padding: 10px 14px; background: rgba(0,0,0,0.3); border: 1px solid var(--border-color);
    border-radius: 8px; color: var(--text-primary); font-size: 13px;
}
.form-control:focus { outline: none; border-color: var(--color-cyan); }

.neon-border { border: 1px solid var(--border-color); transition: all 0.3s; }
.neon-border:hover { border-color: var(--color-cyan); box-shadow: 0 0 15px var(--color-cyan-glow); }

.status-online { background: var(--color-emerald); box-shadow: 0 0 8px var(--color-emerald); }
.status-offline { background: var(--color-rose); box-shadow: 0 0 8px var(--color-rose); }

/* === Login Page === */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at center, #1e293b 0%, #0b1120 100%);
    height: 100vh;
    overflow: hidden;
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-card {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 0 20px rgba(34, 211, 238, 0.1);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header h1 {
    font-family: var(--font-tech);
    font-size: 28px;
    color: var(--color-cyan);
    margin-bottom: 8px;
    text-shadow: 0 0 10px var(--color-cyan-glow);
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
    letter-spacing: 1px;
}

.login-form .form-group {
    margin-bottom: 24px;
}

.login-form label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 13px;
}

.login-form input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    transition: all 0.3s;
}

.login-form input:focus {
    outline: none;
    border-color: var(--color-cyan);
    box-shadow: 0 0 0 2px rgba(34, 211, 238, 0.2);
}

.btn-block {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    margin-top: 8px;
}

.login-footer {
    margin-top: 32px;
    text-align: center;
    color: var(--text-muted);
    font-size: 12px;
}

.alert {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 13px;
    text-align: center;
}

.alert-error {
    background: rgba(244, 63, 94, 0.1);
    border: 1px solid rgba(244, 63, 94, 0.3);
    color: var(--color-rose);
}