/* FamilyLAN - Modern Dark Theme Styles */

:root {
    /* Color Palette */
    --primary-hue: 210;
    --primary: hsl(var(--primary-hue), 100%, 60%);
    --primary-light: hsl(var(--primary-hue), 100%, 70%);
    --primary-dark: hsl(var(--primary-hue), 100%, 45%);
    --primary-glow: hsla(var(--primary-hue), 100%, 60%, 0.3);
    
    --accent-hue: 280;
    --accent: hsl(var(--accent-hue), 80%, 65%);
    --accent-light: hsl(var(--accent-hue), 80%, 75%);
    
    --success: hsl(145, 70%, 50%);
    --success-glow: hsla(145, 70%, 50%, 0.3);
    --warning: hsl(45, 90%, 55%);
    --error: hsl(355, 80%, 60%);
    --error-glow: hsla(355, 80%, 60%, 0.3);
    
    /* Dark Theme */
    --bg-dark: hsl(220, 25%, 8%);
    --bg-card: hsla(220, 25%, 12%, 0.8);
    --bg-card-hover: hsla(220, 25%, 15%, 0.9);
    --bg-input: hsla(220, 25%, 10%, 0.9);
    
    --text-primary: hsl(220, 20%, 95%);
    --text-secondary: hsl(220, 15%, 70%);
    --text-muted: hsl(220, 10%, 50%);
    
    --border-subtle: hsla(220, 20%, 30%, 0.5);
    --border-glow: hsla(var(--primary-hue), 100%, 60%, 0.2);
    
    /* Glass Effect */
    --glass-blur: 20px;
    --glass-border: 1px solid hsla(220, 20%, 40%, 0.3);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
    overflow-x: hidden;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, hsla(var(--primary-hue), 80%, 50%, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, hsla(var(--accent-hue), 80%, 50%, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, hsla(180, 80%, 50%, 0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
    animation: bgPulse 15s ease-in-out infinite alternate;
}

@keyframes bgPulse {
    0% { opacity: 0.8; }
    100% { opacity: 1; }
}

/* App Container */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    min-height: 100vh;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-xl);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    font-size: 2rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: var(--glass-border);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--error);
    box-shadow: 0 0 10px var(--error-glow);
    animation: statusPulse 2s ease-in-out infinite;
}

.connection-status.connected .status-dot {
    background: var(--success);
    box-shadow: 0 0 10px var(--success-glow);
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Glass Card */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
}

.glass-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glow);
}

/* Join Section */
.join-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px);
}

.join-section .glass-card {
    width: 100%;
    max-width: 420px;
    text-align: center;
}

.join-section h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.join-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.input-group {
    text-align: left;
}

.input-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.input-group input,
.peer-select {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-input);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.input-group input:focus,
.peer-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.input-group input::placeholder {
    color: var(--text-muted);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
}

.btn-small {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-icon {
    font-size: 1.25em;
    transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
    transform: translateX(3px);
}

/* Transfer Section */
.transfer-section {
    animation: fadeIn var(--transition-slow);
}

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

.room-info-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    border: var(--glass-border);
}

.room-name {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
}

.room-icon {
    font-size: 1.5rem;
}

.transfer-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--spacing-lg);
}

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

/* Peers Panel */
.peers-panel {
    height: fit-content;
    position: sticky;
    top: var(--spacing-lg);
}

.peers-panel h3,
.files-queue h3,
.transfers-panel h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.panel-icon {
    font-size: 1.25rem;
}

.peers-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.peer-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-input);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.peer-item:hover:not(.empty):not(.self) {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateX(3px);
}

.peer-item.empty {
    color: var(--text-muted);
    font-style: italic;
    cursor: default;
}

.peer-item.self {
    border: 1px solid var(--primary);
    cursor: default;
}

.peer-item.self::after {
    content: '(You)';
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--primary);
}

.peer-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

.peer-name {
    flex: 1;
    font-weight: 500;
}

.peer-status {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
}

/* File Area */
.file-area {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Drop Zone */
.drop-zone {
    position: relative;
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border-subtle);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.drop-zone:hover {
    border-color: var(--primary);
    background: hsla(var(--primary-hue), 100%, 60%, 0.05);
}

.drop-zone.dragover {
    border-color: var(--primary);
    background: hsla(var(--primary-hue), 100%, 60%, 0.1);
    transform: scale(1.02);
}

.drop-zone-content,
.drop-zone-active {
    text-align: center;
    transition: all var(--transition-fast);
}

.drop-zone-active {
    display: none;
}

.drop-zone.dragover .drop-zone-content {
    display: none;
}

.drop-zone.dragover .drop-zone-active {
    display: block;
}

.drop-icon,
.drop-icon-active {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.drop-zone h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.drop-zone p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Files Queue */
.queue-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.queue-header h3 {
    margin-bottom: 0;
}

.files-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    max-height: 200px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-input);
    border-radius: var(--radius-md);
}

.file-icon {
    font-size: 1.5rem;
}

.file-info {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-size {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.file-remove {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    font-size: 1.25rem;
    transition: color var(--transition-fast);
}

.file-remove:hover {
    color: var(--error);
}

.send-section {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
}

.send-to {
    flex: 1;
}

.send-to label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

/* Transfers Panel */
.transfers-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.transfer-item {
    padding: var(--spacing-md);
    background: var(--bg-input);
    border-radius: var(--radius-md);
}

.transfer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.transfer-name {
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.transfer-direction {
    font-size: 1.25rem;
}

.transfer-status {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.transfer-progress {
    height: 6px;
    background: var(--bg-dark);
    border-radius: 3px;
    overflow: hidden;
}

.transfer-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 3px;
    transition: width var(--transition-fast);
}

.transfer-item.complete .transfer-progress-bar {
    background: var(--success);
}

.transfer-item.error .transfer-progress-bar {
    background: var(--error);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: 1000;
}

.toast {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur));
    border: var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: slideIn var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast.success {
    border-left: 3px solid var(--success);
}

.toast.error {
    border-left: 3px solid var(--error);
}

.toast.info {
    border-left: 3px solid var(--primary);
}

/* Utilities */
.hidden {
    display: none !important;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border-subtle);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}