:root {
    --bg-color: #0f172a; /* Tailwind slate-900 */
    --card-bg: #1e293b; /* Tailwind slate-800 */
    --text-primary: #f8fafc; /* Tailwind slate-50 */
    --text-secondary: #94a3b8; /* Tailwind slate-400 */
    --accent-color: #3b82f6; /* Tailwind blue-500 */
    --accent-glow: rgba(59, 130, 246, 0.5);
    --border-color: #334155; /* Tailwind slate-700 */
    --success-color: #10b981; /* Tailwind emerald-500 */
    --danger-color: #ef4444; /* Tailwind red-500 */
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    background: rgba(30, 41, 59, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: 0;
    z-index: 10;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent-color), #8b5cf6);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 15px var(--accent-glow);
}

.logo-icon svg {
    width: 20px;
    height: 20px;
    fill: white;
}

h1 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.025em;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    background-color: rgba(15, 23, 42, 0.5);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--danger-color);
    box-shadow: 0 0 8px var(--danger-color);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.status-dot.connected {
    background-color: var(--success-color);
    box-shadow: 0 0 8px var(--success-color);
}

/* Main Content */
main {
    flex: 1;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

h2 {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Grid Layout */
.screens-grid {
    display: grid;
    /* Menggunakan auto-fill agar kartu PC tidak memanjang (stretch) saat jumlah PC sedikit, dan ukurannya diperkecil agar pas menampung banyak PC */
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    align-items: start;
}

/* Empty State */
.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    background-color: var(--card-bg);
    border-radius: 12px;
    border: 1px dashed var(--border-color);
    color: var(--text-secondary);
    text-align: center;
}

.empty-state svg {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state p {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.empty-state span {
    font-size: 0.875rem;
    opacity: 0.7;
}

/* Screen Card */
.screen-card {
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.9));
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.3);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: flex;
    flex-direction: column;
    cursor: pointer; /* Indicate it's clickable for fullscreen */
}

.screen-card:hover {
    transform: translateY(-5px) scale(1.01);
    box-shadow: 0 20px 40px -5px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--accent-color);
    border-color: transparent;
}

.card-header {
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background-color: rgba(15, 23, 42, 0.3);
    border-bottom: 1px solid var(--border-color);
}

.pc-icon {
    width: 24px;
    height: 24px;
    background-color: var(--bg-color);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
}

.pc-icon svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
}

.pc-name-container {
    flex: 1;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.pc-name {
    font-weight: 500;
    font-size: 0.95rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.edit-name-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    margin-left: 8px;
    opacity: 0;
    transition: opacity 0.2s, color 0.2s, background 0.2s;
    padding: 2px 6px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-header:hover .edit-name-btn {
    opacity: 0.5;
}

.edit-name-btn:hover {
    opacity: 1 !important;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.live-badge {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--success-color);
    letter-spacing: 0.05em;
}

.live-badge::before {
    content: '';
    display: block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--success-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    70% {
        box-shadow: 0 0 0 6px rgba(16, 185, 129, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

.screen-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    background-color: #000;
    overflow: hidden;
}

.screen-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.3s ease;
}

/* Loading skeleton for image */
.screen-skeleton {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--bg-color) 25%, var(--card-bg) 50%, var(--bg-color) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite linear;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

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

.card-footer {
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
    background-color: var(--card-bg);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .screens-grid {
        grid-template-columns: 1fr;
    }
    
    main {
        padding: 1rem;
    }
}

/* Fullscreen Modal Styles */
.fullscreen-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.fullscreen-modal.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    width: 95%;
    max-width: 1600px;
    height: 90%;
    display: flex;
    flex-direction: column;
    background: var(--bg-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transform: scale(1);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.fullscreen-modal.hidden .modal-content {
    transform: scale(0.95);
}

.modal-header {
    padding: 1rem 1.5rem;
    background: rgba(30, 41, 59, 0.9);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
}

.modal-content img {
    flex: 1;
    width: 100%;
    height: calc(100% - 60px);
    object-fit: contain;
    background-color: #000;
}

.close-btn {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary);
    transition: all 0.2s ease;
    z-index: 10;
}

.close-btn:hover {
    background: var(--danger-color);
    transform: rotate(90deg);
}

.close-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* Premium Glass & Layouts */
.glass-modal {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: 200;
    display: flex; align-items: center; justify-content: center;
    opacity: 1; visibility: visible;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}
.glass-modal.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.premium-glass {
    background: rgba(30, 41, 59, 0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5), inset 0 0 0 1px rgba(255,255,255,0.05);
    border-radius: 20px;
    padding: 2.5rem;
    color: var(--text-primary);
    position: relative;
    transform: translateY(0);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.glass-modal.hidden .premium-glass { transform: translateY(20px) scale(0.95); }

/* Login */
.login-card { width: 90%; max-width: 400px; text-align: center; }
.logo-icon.large { width: 56px; height: 56px; margin: 0 auto 1.5rem; }
.logo-icon.large svg { width: 32px; height: 32px; }
.glow-icon { box-shadow: 0 0 25px var(--accent-glow); }
.gradient-text {
    background: linear-gradient(135deg, #fff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}
.subtitle { color: var(--text-secondary); margin-bottom: 2rem; font-size: 0.95rem; }
.input-group { margin-bottom: 1rem; }
.input-group input, .add-user-form input {
    width: 100%; padding: 0.875rem 1rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: white; font-size: 1rem; outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.input-group input:focus, .add-user-form input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}
.primary-btn {
    width: 100%; padding: 0.875rem;
    background: linear-gradient(135deg, var(--accent-color), #6366f1);
    color: white; border: none; border-radius: 10px;
    font-size: 1rem; font-weight: 600; cursor: pointer;
    margin-top: 0.5rem; transition: transform 0.2s, box-shadow 0.2s;
}
.glow-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 20px -10px var(--accent-color); }
.error-text { color: var(--danger-color); font-size: 0.875rem; margin-top: 1rem; min-height: 20px; }

/* Settings */
.settings-card { width: 95%; max-width: 500px; padding: 2rem; }
.settings-card h2 { margin-bottom: 1.5rem; display: flex; align-items: center; }
.settings-section {
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px; padding: 1.5rem; margin-bottom: 1.5rem;
}
.setting-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0; }
.setting-row h3 { font-size: 1.05rem; margin-bottom: 0.25rem; }
.setting-desc { font-size: 0.85rem; color: var(--text-secondary); }

/* Switch */
.switch { position: relative; display: inline-block; width: 50px; height: 28px; flex-shrink:0; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--border-color); transition: .4s; border-radius: 34px;
}
.slider:before {
    position: absolute; content: ""; height: 20px; width: 20px; left: 4px; bottom: 4px;
    background-color: white; transition: .4s; border-radius: 50%;
}
input:checked + .slider { background-color: var(--success-color); }
input:checked + .slider:before { transform: translateX(22px); }

/* User List */
.user-list { margin: 1rem 0; max-height: 150px; overflow-y: auto; }
.user-list::-webkit-scrollbar { width: 6px; }
.user-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 10px; }
.user-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.75rem; background: rgba(0,0,0,0.2); border-radius: 8px; margin-bottom: 0.5rem;
}
.user-info { display: flex; align-items: center; gap: 0.75rem; font-weight: 500;}
.user-avatar { 
    width: 28px; height: 28px; background: var(--accent-color); 
    border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size:12px;
}
.delete-btn {
    background: rgba(239, 68, 68, 0.1); color: var(--danger-color);
    border: none; border-radius: 6px; padding: 4px 8px; cursor: pointer; transition: 0.2s;
}
.delete-btn:hover { background: var(--danger-color); color: white; }

.add-user-form { display: grid; grid-template-columns: 1fr 1fr auto; gap: 0.5rem; margin-top:1rem; }
.secondary-btn {
    background: rgba(255,255,255,0.1); color: white; border: 1px solid rgba(255,255,255,0.2);
    border-radius: 8px; padding: 0 1rem; cursor: pointer; font-weight: 500; transition: 0.2s;
}
.secondary-btn:hover { background: rgba(255,255,255,0.2); }

@media (max-width: 600px) {
    .add-user-form { grid-template-columns: 1fr; }
    .secondary-btn { padding: 0.875rem 1rem; }
}

/* Header Actions */
.header-actions { display: flex; align-items: center; gap: 1rem; }
.icon-btn {
    background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
    color: var(--text-primary); border-radius: 50%; width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center; cursor: pointer;
    transition: all 0.2s;
}
.icon-btn:hover { background: rgba(255,255,255,0.15); transform: rotate(15deg); }