:root {
    /* Color Palette */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --success-gradient: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);

    /* Neutral Colors */
    --bg-primary: #0f0f1e;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #252541;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-modal: rgba(15, 15, 30, 0.95);

    --text-primary: #ffffff;
    --text-secondary: #b8b8d1;
    --text-muted: #7c7c99;

    --border-color: rgba(255, 255, 255, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);

    /* Priority Colors */
    --priority-high: #f5576c;
    --priority-medium: #fee140;
    --priority-low: #4facfe;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Sidebar */
    --sidebar-width: 280px;
    --sidebar-collapsed: 80px;
}

/* Light Mode Variables */
body.light-mode {
    --bg-primary: #f4f6f8;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e2e8f0;
    --bg-card: rgba(255, 255, 255, 0.8);
    --bg-modal: rgba(255, 255, 255, 0.95);

    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;

    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body.light-mode .timetable-cell {
    border-color: #cbd5e0;
}


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

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

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--border-color);
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    transition: transform var(--transition-normal);
    z-index: 1000;
}

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

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

.logo h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: none;
}

/* Day/Night Toggle Switch */
.theme-switch {
    display: inline-block;
    width: 60px;
    height: 30px;
    position: relative;
    margin-right: var(--spacing-sm);
    flex-shrink: 0;
    z-index: 10;
}

.theme-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #2c3e50;
    /* A lighter dark blue for visibility against sidebar */
    /* Dark mode bg default */
    transition: .4s;
    border-radius: 34px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

/* Sun/Moon Circle */
.slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 3px;
    background-color: #fdd835;
    /* Moon/Sun color */
    transition: .4s;
    border-radius: 50%;
    z-index: 2;
    box-shadow: 0 0 2px rgba(0, 0, 0, 0.5);
}

/* Stars (Dark Mode) */
.slider:after {
    content: "";
    position: absolute;
    top: 5px;
    left: 30px;
    width: 3px;
    height: 3px;
    background: white;
    border-radius: 50%;
    box-shadow:
        8px 5px 0 0 white,
        -5px 10px 0 0 white,
        5px 15px 0 0 white;
    transition: 0.4s;
    opacity: 1;
}

/* Light Mode State (Checked) */
input:checked+.slider {
    background-color: #87CEEB;
    /* Sky blue */
}

input:checked+.slider:before {
    transform: translateX(30px);
    background-color: #ffeb3b;
    /* Sun Yellow */
}

input:checked+.slider:after {
    opacity: 0;
    /* Hide stars */
    transform: translateX(-20px);
}

/* Clouds (Light Mode) - Pseudo element on label or extra span needed? 
   Let's use shadow on the circle to simulate clouds or a simple background change for now to keep HTML simple.
   The image showed clouds. We can try to add them as a background image or simpler shapes.
*/
input:checked+.slider {
    /* Simple cloud representation using gradients or just the color */
    background-image: radial-gradient(circle at 10% 40%, rgba(255, 255, 255, 0.8) 10%, transparent 11%),
        radial-gradient(circle at 25% 60%, rgba(255, 255, 255, 0.8) 10%, transparent 11%);
}

.sidebar-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    flex: 1;
    /* Pushes footer down */
}

.sidebar-footer {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.theme-label {
    font-size: 0.9rem;
    font-weight: 500;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-fast);
    z-index: -1;
}

.nav-item:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.nav-item.active {
    color: var(--text-primary);
}

.nav-item.active::before {
    opacity: 1;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    padding: var(--spacing-xl);
    min-height: 100vh;
    transition: margin-left var(--transition-normal);
}

.content-section {
    display: none;
    animation: fadeIn var(--transition-normal);
}

.content-section.active {
    display: block;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.dashboard-actions,
.tasks-controls {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    align-items: center;
}

.search-bar {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0 var(--spacing-sm);
    width: 250px;
}

.search-bar svg {
    color: var(--text-secondary);
}

.search-bar input {
    background: none;
    border: none;
    color: var(--text-primary);
    padding: var(--spacing-sm);
    width: 100%;
    font-family: inherit;
}

.search-bar input:focus {
    outline: none;
}

.filter-select {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    cursor: pointer;
}

.page-header h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: 'Inter', sans-serif;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

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

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: rgba(255, 255, 255, 0.2);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-content {
    flex: 1;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.stat-value {
    font-family: 'Poppins', sans-serif;
    font-size: 2rem;
    font-weight: 700;
}

/* Progress Card */
.progress-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.progress-card h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.progress-bar-container {
    width: 100%;
    height: 12px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.progress-bar {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 6px;
    transition: width var(--transition-slow);
    width: 0%;
}

.progress-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Recent Tasks */
.recent-tasks h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

/* Task List */
.task-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.task-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.task-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: var(--priority-medium);
}

.task-card.priority-high::before {
    background: var(--priority-high);
}

.task-card.priority-low::before {
    background: var(--priority-low);
}

.task-card:hover {
    transform: translateX(5px);
    border-color: rgba(255, 255, 255, 0.2);
}

.task-card.completed {
    opacity: 0.6;
}

.task-card.completed .task-header h4,
.task-card.completed .task-topic {
    text-decoration: line-through;
}

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

.task-title-group h4 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.task-topic {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.task-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.task-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.task-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.task-btn.complete-btn:hover {
    color: #43e97b;
}

.task-btn.delete-btn:hover {
    color: var(--priority-high);
}

.task-meta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-sm);
}

.task-meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.priority-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.priority-badge.high {
    background: rgba(245, 87, 108, 0.2);
    color: var(--priority-high);
}

.priority-badge.medium {
    background: rgba(254, 225, 64, 0.2);
    color: var(--priority-medium);
}

.priority-badge.low {
    background: rgba(79, 172, 254, 0.2);
    color: var(--priority-low);
}

/* Timetable */
.timetable-container {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    overflow-x: auto;
}

.timetable {
    display: grid;
    grid-template-columns: 80px repeat(7, 1fr);
    gap: 1px;
    background: var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    min-width: 800px;
}

.timetable-cell {
    background: var(--bg-secondary);
    padding: var(--spacing-sm);
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
}

.timetable-header {
    background: var(--bg-tertiary);
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
}

.timetable-time {
    background: var(--bg-tertiary);
    font-weight: 500;
    color: var(--text-secondary);
}

.timetable-task {
    background: var(--primary-gradient);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs);
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.timetable-task:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow);
}

.timetable-task.highlight {
    animation: pulse 2s infinite;
    border: 2px solid #fff;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(245, 87, 108, 0.4);
    }

    70% {
        box-shadow: 0 0 0 10px rgba(245, 87, 108, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(245, 87, 108, 0);
    }
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-modal);
    backdrop-filter: blur(10px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    animation: fadeIn var(--transition-fast);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp var(--transition-normal);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.modal-header h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

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

/* Toast */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    transform: translateY(150%);
    transition: transform var(--transition-normal);
    z-index: 3000;
    max-width: 400px;
}

.toast.show {
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 100%;
    }

    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .sidebar-toggle {
        display: block;
    }

    .sidebar-header {
        width: 100%;
    }

    .theme-switch {
        margin-right: var(--spacing-sm);
    }

    .main-content {
        margin-left: 0;
        padding: var(--spacing-md);
    }

    .page-header h2 {
        font-size: 2rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .task-meta {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
}

@media (max-width: 480px) {
    .page-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
    }

    .dashboard-actions,
    .tasks-controls {
        flex-direction: column;
        width: 100%;
    }

    .search-bar {
        width: 100%;
    }

    .filter-select {
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .stat-value {
        font-size: 1.5rem;
    }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-state svg {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.empty-state p {
    font-size: 0.9rem;
}

/* =========================
   Landing Page Styles
   ========================= */
.landing-page {
    background: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.landing-nav {
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    justify-content: center;
}

.hero-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.hero-title {
    font-family: 'Poppins', sans-serif;
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: var(--spacing-xl);
}

.auth-box {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 480px;
    margin-bottom: var(--spacing-xl);
    backdrop-filter: blur(10px);
}

.input-group {
    display: flex;
    gap: var(--spacing-sm);
}

.input-group input {
    flex: 1;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 1rem;
}

.input-group input:focus {
    outline: none;
    border-color: #667eea;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.1rem;
}

.auth-note {
    margin-top: var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.features-grid-landing {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    width: 100%;
    margin-top: var(--spacing-xl);
}

.feature-item {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: left;
    transition: transform var(--transition-normal);
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-icon {
    display: inline-flex;
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    color: #667eea;
    margin-bottom: var(--spacing-sm);
}

.feature-item h3 {
    font-family: 'Poppins', sans-serif;
    margin-bottom: var(--spacing-xs);
    font-size: 1.1rem;
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.landing-footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .input-group {
        flex-direction: column;
    }

    .landing-nav {
        padding: var(--spacing-md);
    }
}

/* ===========================
   New Feature Styles
   =========================== */

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

.modal-header h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.25rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
}

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

/* Toast (Refined) */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--bg-tertiary); /* fallback */
    background: var(--secondary-gradient);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 3000;
    font-weight: 500;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* Chat Widget */
.chat-widget {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 2500;
}

.chat-toggle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-gradient);
    border: none;
    color: white;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-toggle:hover {
    transform: scale(1.1);
}

.chat-window {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 350px;
    height: 500px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform-origin: bottom right;
    transform: scale(0);
    opacity: 0;
    transition: all var(--transition-normal);
}

.chat-window.active {
    transform: scale(1);
    opacity: 1;
}

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

.chat-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.chat-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
}

.chat-messages {
    flex: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.message {
    max-width: 80%;
    padding: 10px 14px;
    border-radius: 14px;
    font-size: 0.9rem;
    line-height: 1.4;
}

.ai-message {
    align-self: flex-start;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-bottom-left-radius: 2px;
}

.user-message {
    align-self: flex-end;
    background: var(--primary-gradient);
    color: white;
    border-bottom-right-radius: 2px;
}

.chat-input-area {
    padding: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-xs);
    background: var(--bg-tertiary);
}

.chat-input-area input {
    flex: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 20px;
    color: var(--text-primary);
    font-family: inherit;
}

.chat-input-area input:focus {
    outline: none;
    border-color: #667eea;
}

.chat-input-area button {
    background: none;
    border: none;
    color: #667eea;
    cursor: pointer;
    padding: 0 5px;
}

/* Responsive Adjustments for Chat */
@media (max-width: 768px) {
    .chat-window {
        width: 300px;
        right: -10px;
    }
}