/* ==============================================================
   BUILDING OS - LIQUID GLASSMORPHISM THEME (STRICT DARK MODE)
   ============================================================== */

:root {
    --sidebar-width: 280px;
    --accent: #00ff9d;       /* Neon cyan/green accent */
    --accent-glow: rgba(0, 255, 157, 0.4);
    --heat-red: #ff3333;
    --cool-blue: #00ccff;
    
    /* Dark Mode Liquid Glass Variables - INCREASED TRANSPARENCY */
    --glass-bg: rgba(10, 15, 25, 0.25); /* Much more see-through */
    --glass-blur: blur(16px); /* Slightly reduced blur to enhance transparency */
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
    
    /* Liquid Edge Lighting */
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-gloss: inset 0 1px 1px rgba(255, 255, 255, 0.15);
    --glass-inner-glow: inset 0px 0px 20px rgba(255, 255, 255, 0.02);
    
    /* Typography */
    --text-main: #ffffff;
    --text-muted: #a0aec0;
}

/* Force dark theme globally and apply the BLUE-GRAY GRADIENT */
body { 
    /* Deep Slate to Rich Blue-Gray Gradient */
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 50%, #020617 100%);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--text-main);
    overflow-x: hidden;
    min-height: 100vh;
}

/* Top Navigation Bar */
.navbar-glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    z-index: 1030;
}

.menu-btn { 
    background: transparent; 
    border: none; 
    color: var(--text-main); 
    font-size: 1.5rem; 
    cursor: pointer; 
    padding: 0 10px 0 0; 
}

/* Hide theme toggle since we are strictly dark mode now */
.theme-toggle { 
    display: none; 
}

/* Slide-Out Sidebar */
.sidebar {
    position: fixed; 
    top: 0; 
    left: calc(-1 * var(--sidebar-width)); 
    width: var(--sidebar-width); 
    height: 100vh;
    background: var(--glass-bg); 
    backdrop-filter: var(--glass-blur); 
    -webkit-backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--glass-border); 
    box-shadow: var(--glass-shadow);
    transition: left 0.3s ease; 
    z-index: 1040; 
    display: flex; 
    flex-direction: column; 
    padding: 20px 0;
}

.sidebar.open { left: 0; }

.sidebar-overlay {
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100vw; 
    height: 100vh; 
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px); 
    opacity: 0; 
    visibility: hidden; 
    transition: opacity 0.3s ease; 
    z-index: 1035;
}

.sidebar-overlay.open { opacity: 1; visibility: visible; }

.sidebar-header { 
    padding: 0 20px 20px; 
    font-weight: bold; 
    font-size: 1.2rem; 
    border-bottom: 1px solid var(--glass-border); 
    margin-bottom: 10px; 
    color: var(--accent); 
    text-shadow: 0 0 10px var(--accent-glow);
}

.sidebar-link { 
    display: flex; 
    align-items: center; 
    padding: 12px 20px; 
    color: var(--text-muted); 
    text-decoration: none; 
    font-weight: 500; 
    transition: all 0.2s ease; 
}

.sidebar-link i { width: 24px; text-align: center; margin-right: 10px; }

.sidebar-link:hover, .sidebar-link.active { 
    background: rgba(0, 255, 157, 0.1); 
    color: var(--text-main); 
    border-right: 4px solid var(--accent); 
    box-shadow: inset 15px 0 20px -10px var(--accent-glow);
}

/* Liquid Glass Cards */
.card-glass {
    background: var(--glass-bg); 
    backdrop-filter: var(--glass-blur); 
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border); 
    border-radius: 16px; 
    box-shadow: var(--glass-shadow), var(--glass-inner-glow);
    position: relative;
    overflow: hidden;
    color: var(--text-main);
}

/* Subtle liquid sheen on hover to make it look like thick glass */
.card-glass::before {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 50%; height: 100%;
    background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.05) 50%, rgba(255,255,255,0) 100%);
    transform: skewX(-25deg);
    transition: 0.7s ease-in-out;
    pointer-events: none;
}
.card-glass:hover::before {
    left: 200%;
}

/* Modals */
.modal-glass .modal-content {
    background: rgba(15, 20, 30, 0.75); /* Made modals slightly more transparent too */
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid rgba(255,255,255,0.15); 
    box-shadow: 0 15px 50px rgba(0,0,0,0.8), var(--glass-border-gloss);
    color: var(--text-main); 
    border-radius: 20px;
}

/* Forms & Inputs */
.form-control-glass, .form-select-glass {
    background: rgba(0, 0, 0, 0.2); 
    border: 1px solid rgba(255,255,255,0.1); 
    color: var(--text-main); 
    border-radius: 8px;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.5);
    transition: all 0.3s ease;
}

.form-control-glass:focus, .form-select-glass:focus { 
    background: rgba(0, 0, 0, 0.4); 
    border-color: var(--accent); 
    box-shadow: 0 0 0 0.25rem var(--accent-glow), inset 0 2px 5px rgba(0,0,0,0.5); 
    color: var(--text-main); 
    outline: none;
}

.form-control-glass::placeholder {
    color: rgba(255,255,255,0.4);
}

/* Tables & Lists */
.table-custom { color: var(--text-main); }

.table-custom th { 
    color: var(--text-muted); 
    text-transform: uppercase; 
    font-size: 0.75rem; 
    letter-spacing: 0.5px; 
    border-bottom: 1px solid rgba(255,255,255,0.1); 
    background: transparent; 
}

.table-custom td { 
    background: transparent; 
    border-bottom: 1px solid rgba(255,255,255,0.05); 
    color: var(--text-main); 
}

.list-group-glass .list-group-item { 
    background-color: transparent; 
    border-color: rgba(255,255,255,0.05); 
    color: var(--text-main); 
}