:root {
    /* Color Palette - Deep Space/Cyber Theme */
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --accent: #8b5cf6;
    --accent-hover: #7c3aed;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    /* Glass Effects */
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.36);

    /* Spacing & Layout */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: radial-gradient(circle at top right, #1e293b, var(--bg-darker));
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* --- Layout --- */

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding: var(--spacing-md);
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
}

.center-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    width: 100%;
}

/* --- Navigation / Top Bar --- */

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.nav-actions {
    display: flex;
    gap: var(--spacing-sm);
    position: relative;
}

/* --- Form Components (Sliders & Toggles) --- */

/* Custom Range Slider */
input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
    padding: 0;
    margin: var(--spacing-sm) 0;
}

input[type=range]:focus {
    outline: none;
}

/* Slider Track */
input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 6px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    border: none;
}

/* Slider Thumb */
input[type=range]::-webkit-slider-thumb {
    height: 18px;
    width: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -6px;
    /* center thumb on track */
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
    transition: transform 0.1s;
}

input[type=range]:hover::-webkit-slider-thumb {
    transform: scale(1.1);
}

/* Toggle Switch */
.toggle-switch {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.toggle-input {
    display: none;
}

.toggle-slider {
    position: relative;
    width: 44px;
    height: 24px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    transition: 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    border: 1px solid var(--glass-border);
}

.toggle-slider::before {
    content: "";
    position: absolute;
    height: 18px;
    width: 18px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    border-radius: 50%;
    transition: 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-input:checked+.toggle-slider {
    background-color: var(--success);
    border-color: transparent;
}

.toggle-input:checked+.toggle-slider::before {
    transform: translateX(20px);
}

/* Updated Icon Button Size */
.icon-btn {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    /* Increased from 40px */
    height: 48px;
    /* Increased from 40px */
}

.icon-btn svg {
    width: 24px;
    height: 24px;
}

/* --- Menus & Modals --- */

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 500;
    animation: fadeIn 0.3s ease-out;
}

.settings-modal {
    background: rgba(15, 23, 42, 0.85);
    /* Glass variant */
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 450px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.05);
    /* Detailed shadow */
    display: flex;
    flex-direction: column;
    animation: scaleIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes scaleIn {
    from {
        transform: scale(0.96);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

.modal-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.02);
}

.modal-title {
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    background: linear-gradient(to right, #fff, #cbd5e1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.modal-body {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-height: 70vh;
    overflow-y: auto;
}

/* Modal specific items */
.modal-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.modal-item.danger {
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.1);
    background: rgba(239, 68, 68, 0.02);
}

.modal-item.danger:hover {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.3);
}

.modal-section-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.08em;
    font-weight: 700;
    margin-top: 4px;
    margin-bottom: 2px;
    padding-left: 4px;
    /* Align with content */
}

/* Server Selection List Item Specifics */
.server-option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-radius: var(--radius-md);
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: 8px;
}

.server-option:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.4);
    transform: translateY(-1px);
}

.server-option.selected {
    background: rgba(59, 130, 246, 0.15);
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.15);
}

.server-option-name {
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.server-option-detail {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.check-mark {
    color: var(--primary);
    font-weight: 800;
    font-size: 1.1rem;
    text-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
}

/* --- Join Screen Improvements --- */

/* Compact Server Selector */
.server-selector-compact {
    position: relative;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    background: rgba(0, 0, 0, 0.2);
    overflow: hidden;
    margin-top: var(--spacing-sm);
    display: flex;
    align-items: center;
    transition: border-color 0.2s;
}

.server-selector-compact:hover {
    border-color: rgba(255, 255, 255, 0.2);
}

.server-selector-compact select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    appearance: none;
    -webkit-appearance: none;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
}

.server-selector-compact select:focus {
    outline: none;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.server-selector-compact::after {
    content: '▾';
    position: absolute;
    right: var(--spacing-md);
    color: var(--text-muted);
    pointer-events: none;
    font-size: 0.8rem;
}

/* --- Join / Landing Screen --- */

.join-card {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 440px;
    box-shadow: var(--glass-shadow);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    animation: scaleIn 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-group label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-left: 2px;
}

input[type="text"],
input[type="password"] {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s ease;
}

input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(15, 23, 42, 0.8);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    border: none;
    padding: 14px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
}

.btn-primary:after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.1), transparent);
    opacity: 0;
    transition: opacity 0.2s;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px -4px rgba(59, 130, 246, 0.5);
}

.btn-primary:hover:after {
    opacity: 1;
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    filter: grayscale(0.5);
}

/* --- Lobby Interface --- */

.lobby-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    width: 100%;
    height: 100%;
}

@media (max-width: 768px) {
    .lobby-grid {
        grid-template-columns: 1fr;
    }
}

.panel {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    height: 100%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.3);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--glass-border);
    margin-bottom: var(--spacing-xs);
}

.panel-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

/* Player List */
.player-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.player-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.2s;
}

.player-card:hover {
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateX(2px);
}

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

.avatar {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, #475569, #1e293b);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.player-name {
    font-weight: 600;
    color: var(--text-primary);
}

.player-detail {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.65rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge.vip {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.3);
    box-shadow: 0 0 10px rgba(245, 158, 11, 0.1);
}

.badge.ready {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.1);
}

/* Game Options & VIP Controls */

.options-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: var(--spacing-md);
}

.vip-section-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 800;
    margin-top: var(--spacing-md);
    margin-bottom: 4px;
    letter-spacing: 0.05em;
    padding-left: 2px;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 10px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.2);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 700;
    transition: all 0.2s;
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.4);
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.15);
}

.btn-start {
    background: var(--success);
    background: linear-gradient(135deg, var(--success), #059669);
    color: white;
    padding: 16px;
    border-radius: var(--radius-md);
    border: none;
    font-weight: 800;
    font-size: 1.1rem;
    cursor: pointer;
    width: 100%;
    margin-top: auto;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.02em;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-start:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.4);
    filter: brightness(1.1);
}

/* Game Options UI */
.game-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.option-group-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 700;
    letter-spacing: 0.06em;
    padding-left: 2px;
    margin-bottom: 2px;
}

.option-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.option-slider-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.option-label {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 500;
}

.option-value {
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 600;
    background: rgba(59, 130, 246, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
}

.option-item select {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    cursor: pointer;
    width: 100%;
}

.option-item select:focus {
    outline: none;
    border-color: var(--primary);
}

/* Footer & Status */
.status-bar {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    padding: 8px 16px;
    border-radius: 20px;
    /* Pillow shape for status */
    border: 1px solid var(--glass-border);
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--glass-shadow);
    transition: all 0.2s;
    z-index: 400;
}

.status-bar:hover {
    background: rgba(30, 41, 59, 0.9);
    transform: translateY(-2px);
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

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

.dot.connecting {
    background: var(--warning);
    box-shadow: 0 0 8px var(--warning);
    animation: pulse 1.5s infinite;
}

.dot.disconnected {
    background: var(--danger);
}

@keyframes pulse {
    0% {
        opacity: 0.5;
        transform: scale(0.9);
    }

    50% {
        opacity: 1;
        transform: scale(1.1);
    }

    100% {
        opacity: 0.5;
        transform: scale(0.9);
    }
}