/* Nexus 2.0 - Goal Acceleration Platform */
/* Clean, modern, productivity-focused design */

:root {
    /* Color Palette */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #10b981;
    --accent: #f59e0b;
    --danger: #ef4444;
    
    /* Background Colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #334155;
    --bg-hover: #475569;
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    /* Borders & Shadows */
    --border-color: #475569;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 100vw;
}

/* Header Styles */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

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

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

.logo i {
    color: var(--primary);
    font-size: 1.5rem;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.version {
    color: var(--accent);
    font-weight: 600;
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    padding-left: var(--spacing-sm);
    border-left: 2px solid var(--border-color);
}

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

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

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

.status-dot.active {
    background: var(--secondary);
    animation: pulse 2s infinite;
}

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

.btn-focus {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-normal);
}

.btn-focus:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Main Content Layout */
.app-main {
    display: grid;
    grid-template-columns: 300px 1fr 300px;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    flex: 1;
}

/* Panel Styles */
.left-panel, .center-panel, .right-panel {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

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

.panel-header h2 {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.1rem;
    font-weight: 600;
}

.btn-add {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-fast);
}

.btn-add:hover {
    background: var(--bg-hover);
}

/* Goals Container */
.goals-container {
    padding: var(--spacing-md);
    max-height: 400px;
    overflow-y: auto;
}

.goal-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border-left: 4px solid var(--primary);
    transition: all var(--transition-normal);
}

.goal-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

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

.goal-title {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.goal-category {
    display: inline-block;
    padding: 2px 8px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.goal-priority {
    font-size: 0.8rem;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.priority-high { background: var(--danger); color: white; }
.priority-medium { background: var(--accent); color: black; }
.priority-low { background: var(--text-muted); color: white; }

.goal-progress {
    margin-top: var(--spacing-sm);
}

.progress-bar {
    height: 6px;
    background: var(--bg-primary);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 3px;
    transition: width var(--transition-normal);
}

.progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.goal-deadline {
    margin-top: var(--spacing-sm);
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.goal-actions {
    margin-top: var(--spacing-md);
    display: flex;
    gap: var(--spacing-xs);
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-sm);
}

.btn-action {
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    border: none;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 4px;
    font-weight: 500;
}

.btn-edit {
    background: var(--primary);
    color: white;
}

.btn-edit:hover {
    background: var(--primary-dark);
}

.btn-delete {
    background: var(--danger);
    color: white;
}

.btn-delete:hover {
    background: #dc2626;
}

.btn-progress {
    background: var(--secondary);
    color: white;
}

.btn-progress:hover {
    background: #059669;
}

/* Progress Summary */
.progress-summary {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.progress-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.stat-card {
    background: var(--bg-card);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 2px;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Center Panel - Focus Area */
.center-panel {
    display: flex;
    flex-direction: column;
}

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

.focus-timer {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
}

.focus-task {
    flex: 1;
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

.focus-placeholder {
    text-align: center;
    color: var(--text-muted);
}

.focus-placeholder i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary);
    opacity: 0.5;
}

.task-details {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.resources-section {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

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

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

.resource-item:hover {
    background: var(--bg-hover);
    transform: translateX(4px);
}

.resource-icon {
    width: 32px;
    height: 32px;
    background: var(--primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

/* Right Panel - Insights */
.insights-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.insights-container {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.insight-card {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent);
}

.insight-card i {
    color: var(--accent);
    margin-bottom: var(--spacing-xs);
}

.insight-card h4 {
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.insight-card p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.quick-actions {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.action-btn {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    justify-content: center;
    transition: all var(--transition-fast);
}

.action-btn:hover {
    background: var(--bg-hover);
    transform: translateY(-2px);
}

/* Footer */
.app-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.footer-text {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-muted);
}

.stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    width: 90%;
    max-width: 500px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-secondary:hover {
    background: var(--bg-hover);
}

/* Loading States */
.loading {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .app-main {
        grid-template-columns: 250px 1fr 250px;
    }
}

@media (max-width: 992px) {
    .app-main {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .left-panel, .center-panel, .right-panel {
        min-height: auto;
    }
}

@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
    
    .header-left, .header-right {
        width: 100%;
        justify-content: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

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

.fade-in {
    animation: fadeIn var(--transition-normal);
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}
/* Light Mode Styles */
[data-theme="light"] {
    /* Background Colors */
    --bg-primary: #f8fafc;
    --bg-secondary: #e2e8f0;
    --bg-card: #ffffff;
    --bg-hover: #f1f5f9;
    
    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    /* Borders & Shadows */
    --border-color: #cbd5e1;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

/* Theme Toggle Button */
.btn-theme {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.btn-theme:hover {
    background: var(--bg-hover);
    transform: translateY(-1px);
}