/* CSS Reset & Variable Definitions */
:root {
    --bg-app: #080B11;
    --bg-sidebar: #0E131F;
    --bg-card: rgba(20, 27, 45, 0.6);
    --bg-card-hover: rgba(28, 38, 62, 0.8);
    --border-color: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(0, 242, 254, 0.3);
    
    --text-primary: #F3F4F6;
    --text-secondary: #9CA3AF;
    --text-muted: #6B7280;
    
    --primary: #00F2FE;
    --primary-glow: rgba(0, 242, 254, 0.15);
    --purple: #9F7AEA;
    --purple-glow: rgba(159, 122, 234, 0.15);
    --success: #10B981;
    --success-glow: rgba(16, 185, 129, 0.15);
    --warning: #F59E0B;
    --danger: #EF4444;
    --danger-glow: rgba(239, 68, 68, 0.15);
    
    --font-primary: 'Inter', sans-serif;
    --font-display: 'Outfit', sans-serif;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --glass-blur: blur(16px);
}

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

body {
    background-color: var(--bg-app);
    color: var(--text-primary);
    font-family: var(--font-primary);
    overflow-x: hidden;
    height: 100vh;
}

/* App Container Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar Styles */
.sidebar {
    width: 260px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 24px;
    flex-shrink: 0;
    z-index: 10;
}

.sidebar-header {
    margin-bottom: 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 24px;
    background: linear-gradient(135deg, var(--primary), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.5));
}

.logo-text {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.logo-text span {
    color: var(--primary);
}

.sidebar-nav {
    flex-grow: 1;
}

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 8px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    border-radius: 12px;
    transition: var(--transition-smooth);
}

.sidebar-nav a:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.03);
}

.sidebar-nav li.active a {
    color: var(--primary);
    background-color: var(--primary-glow);
    border: 1px solid rgba(0, 242, 254, 0.15);
}

.nav-icon {
    width: 20px;
    height: 20px;
    transition: var(--transition-smooth);
}

.sidebar-nav li.active .nav-icon {
    filter: drop-shadow(0 0 4px var(--primary));
}

.badge {
    margin-left: auto;
    background-color: var(--purple-glow);
    border: 1px solid rgba(159, 122, 234, 0.3);
    color: var(--purple);
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 20px;
    font-weight: 600;
}

.sidebar-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--purple));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 700;
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: 14px;
    font-weight: 600;
}

.user-role {
    font-size: 12px;
    color: var(--text-muted);
}

/* Main Content Styles */
.main-content {
    flex-grow: 1;
    overflow-y: auto;
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

/* Top Header */
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.welcome-section h1 {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 4px;
}

.highlight {
    background: linear-gradient(90deg, var(--primary), #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 14px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.date-display {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 10px 16px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* General Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--purple));
    color: #080B11;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.25);
}

.btn-primary:hover {
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.4);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

/* Stats Cards Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    position: relative;
    backdrop-filter: var(--glass-blur);
    transition: var(--transition-smooth);
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.1);
    background-color: var(--bg-card-hover);
}

.stat-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.stat-icon svg {
    width: 22px;
    height: 22px;
}

.icon-blue {
    background-color: var(--primary-glow);
    color: var(--primary);
    border: 1px solid rgba(0, 242, 254, 0.15);
}

.icon-green {
    background-color: var(--success-glow);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.15);
}

.icon-purple {
    background-color: var(--purple-glow);
    color: var(--purple);
    border: 1px solid rgba(159, 122, 234, 0.15);
}

.icon-orange {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.15);
}

.stat-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-value {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
}

.stat-trend {
    font-size: 11px;
    font-weight: 600;
    margin-top: 12px;
}

.trend-up {
    color: var(--success);
}

.trend-down {
    color: var(--danger);
}

.trend-neutral {
    color: var(--text-muted);
}

/* Widgets Section */
.dashboard-widgets {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

@media (max-width: 900px) {
    .dashboard-widgets {
        grid-template-columns: 1fr;
    }
}

.widget-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 24px;
    backdrop-filter: var(--glass-blur);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.widget-header {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.widget-header h3 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
}

.widget-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
}

.chart-container {
    height: 180px;
    position: relative;
}

/* AI Terminal Widget Styles */
.widget-ai {
    border: 1px solid rgba(159, 122, 234, 0.15);
}

.ai-title {
    display: flex;
    align-items: center;
    gap: 8px;
}

.sparkle-icon {
    font-size: 18px;
    filter: drop-shadow(0 0 6px var(--purple));
}

.ai-terminal {
    background-color: rgba(5, 7, 12, 0.7);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    flex-grow: 1;
    min-height: 180px;
}

.terminal-logs {
    flex-grow: 1;
    padding: 16px;
    font-family: monospace;
    font-size: 12px;
    line-height: 1.6;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 130px;
}

.system-msg {
    color: var(--purple);
}

.help-text {
    color: var(--text-muted);
}

.user-cmd {
    color: var(--primary);
}

.success-msg {
    color: var(--success);
}

.error-msg {
    color: var(--danger);
}

.terminal-input-wrapper {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    background-color: rgba(255, 255, 255, 0.02);
    border-top: 1px solid var(--border-color);
}

.prompt-symbol {
    color: var(--primary);
    font-family: monospace;
    font-weight: bold;
    margin-right: 8px;
}

#ai-input-field {
    flex-grow: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: monospace;
    font-size: 13px;
}

#ai-input-field::placeholder {
    color: var(--text-muted);
}

.btn-ai-submit {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    transition: var(--transition-smooth);
}

.btn-ai-submit:hover {
    color: var(--primary);
}

/* Tasks Board Layout */
.tasks-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
}

.tasks-section-header h2 {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 600;
}

.task-filters {
    display: flex;
    gap: 8px;
}

.filter-btn {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.filter-btn:hover {
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.15);
}

.filter-btn.active {
    background-color: var(--text-primary);
    color: var(--bg-app);
    border-color: var(--text-primary);
    font-weight: 600;
}

.task-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 16px;
}

/* Task Item Styling */
.task-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.task-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background-color: var(--text-muted);
}

.task-item.priority-low::before { background-color: var(--text-muted); }
.task-item.priority-medium::before { background-color: var(--primary); }
.task-item.priority-high::before { background-color: var(--purple); }
.task-item.priority-urgent::before { background-color: var(--danger); }

.task-item:hover {
    background-color: var(--bg-card-hover);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateX(2px);
}

.task-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Custom Checkbox */
.checkbox-container {
    position: relative;
    cursor: pointer;
    display: block;
    width: 20px;
    height: 20px;
}

.checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 20px;
    width: 20px;
    border: 2px solid var(--text-muted);
    border-radius: 6px;
    transition: var(--transition-smooth);
}

.checkbox-container:hover input ~ .checkmark {
    border-color: var(--primary);
}

.checkbox-container input:checked ~ .checkmark {
    background-color: var(--success);
    border-color: var(--success);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.checkbox-container input:checked ~ .checkmark:after {
    display: block;
}

.checkbox-container .checkmark:after {
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.task-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.task-title {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    transition: var(--transition-smooth);
}

.task-item.completed .task-title {
    text-decoration: line-through;
    color: var(--text-muted);
}

.task-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--text-muted);
}

.tag {
    text-transform: capitalize;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 4px;
}

.tag-work { background-color: rgba(59, 130, 246, 0.1); color: #60A5FA; }
.tag-personal { background-color: rgba(16, 185, 129, 0.1); color: #34D399; }
.tag-study { background-color: rgba(139, 92, 246, 0.1); color: #A78BFA; }

.task-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.priority-badge {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 2px 6px;
    border-radius: 4px;
}

.p-low { background-color: rgba(255,255,255,0.05); color: var(--text-muted); }
.p-medium { background-color: rgba(0, 242, 254, 0.1); color: var(--primary); }
.p-high { background-color: var(--purple-glow); color: var(--purple); }
.p-urgent { background-color: var(--danger-glow); color: var(--danger); }

.delete-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    transition: var(--transition-smooth);
}

.delete-btn:hover {
    color: var(--danger);
    background-color: rgba(239, 68, 68, 0.05);
}

/* Modal Overlay Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(5, 7, 12, 0.85);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-smooth);
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background-color: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    width: 100%;
    max-width: 480px;
    padding: 32px;
    box-shadow: 0 10px 30px rgba(0, 242, 254, 0.1);
    transform: translateY(20px);
    transition: var(--transition-smooth);
}

.modal-overlay.open .modal-card {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.modal-header h2 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
}

.close-btn {
    background: transparent;
    border: none;
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.close-btn:hover {
    color: var(--text-primary);
}

/* Form Styling */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

input[type="text"],
select,
input[type="date"] {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 14px;
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 14px;
    outline: none;
    transition: var(--transition-smooth);
}

input[type="text"]:focus,
select:focus,
input[type="date"]:focus {
    border-color: var(--primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 32px;
}

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

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

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.15);
}