:root {
    --primary: #7C3AED;
    --primary-dark: #6D28D9;
    --primary-light: #A78BFA;
    --secondary: #EC4899;
    --accent: #F59E0B;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 6px 12px -2px rgba(0, 0, 0, 0.1), 0 3px 6px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 40px -10px rgba(0, 0, 0, 0.15), 0 10px 20px -5px rgba(0, 0, 0, 0.08);
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 Oxygen, Ubuntu, Cantarell, "Open Sans", sans-serif;
    background: linear-gradient(135deg, #f5f3ff 0%, #fdf2f8 100%);
    min-height: 100vh;
    color: var(--gray-800);
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
    box-shadow: 0 0 20px rgba(124, 58, 237, 0.4);
}

.nav-links {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    transition: all 0.2s;
}

.nav-link:hover {
    background-color: var(--gray-100);
    transform: translateY(-2px);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    box-shadow: var(--shadow-lg);
}

.nav-link i {
    width: 20px;
    text-align: center;
}

.notification-badge {
    background-color: var(--secondary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    margin-left: auto;
}

.user-info {
    padding: 1.5rem;
    border-top: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1.25rem;
}

.user-details h4 {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.user-details p {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 2rem;
    max-width: 1200px;
}

/* Mobile header – hidden by default, shown on small screens */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem;
    border-bottom: 1px solid var(--gray-200);
    z-index: 90;
    box-shadow: var(--shadow);
}

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

/* Overlay badge (for icons) – use together with .notification-badge when you need an absolute positioned badge */
.notification-badge.overlay-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    padding: 2px 6px;
    font-size: 11px;
    margin-left: 0; /* reset the auto margin */
}

/* Page Styles */
.page {
    display: none;
    animation: fadeIn 0.3s ease;
}

.page.active {
    display: block;
}

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

.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-header p {
    color: var(--gray-600);
    font-size: 1.125rem;
}

/* Card Styles */
.card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transition: all 0.3s;
    border: 1px solid var(--gray-200);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-content {
    padding: 1.5rem;
}

/* Button Styles */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 0.875rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(124, 58, 237, 0.4);
}

.btn-secondary {
    background-color: var(--gray-100);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background-color: var(--gray-200);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

/* Badge Styles */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid transparent;
}

.badge-primary {
    background-color: var(--primary-light);
    color: var(--primary-dark);
    border-color: var(--primary);
}

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

.badge-success {
    background-color: #D1FAE5;
    color: #065F46;
    border-color: #10B981;
}

.badge-warning {
    background-color: #FEF3C7;
    color: #92400E;
    border-color: #F59E0B;
}

.badge-danger {
    background-color: #FEE2E2;
    color: #991B1B;
    border-color: #EF4444;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--gray-700);
}

.form-input, .form-textarea, .form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-300);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 Oxygen, Ubuntu, Cantarell, "Open Sans", sans-serif;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* Activity Card */
.activity-card {
    margin-bottom: 1.5rem;
}

.activity-card .card-header {
    padding-bottom: 1rem;
}

.activity-meta {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background-color: var(--gray-100);
    border-radius: var(--radius);
    font-size: 0.875rem;
    color: var(--gray-700);
}

.meta-item i {
    color: var(--primary);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-500);
}

/* Map Styles */
#map {
    height: 600px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

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

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 4px;
}

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

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

/* Utility Classes */
.text-center {
    text-align: center;
}

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 2.5rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

.flex {
    display: flex;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-2 {
    gap: 0.5rem;
}

.gap-3 {
    gap: 0.75rem;
}

.gap-4 {
    gap: 1rem;
}

.w-full {
    width: 100%;
}

.hidden {
    display: none;
}

/* Activity Type Colors */
.activity-type-badge.coffee {
    background-color: #FEF3C7;
    color: #92400E;
    border-color: #F59E0B;
}

.activity-type-badge.food {
    background-color: #FEE2E2;
    color: #991B1B;
    border-color: #EF4444;
}

.activity-type-badge.sports {
    background-color: #D1FAE5;
    color: #065F46;
    border-color: #10B981;
}

.activity-type-badge.study {
    background-color: #E0E7FF;
    color: #3730A3;
    border-color: #4F46E5;
}

.activity-type-badge.gaming {
    background-color: #EDE9FE;
    color: #5B21B6;
    border-color: #7C3AED;
}

.activity-type-badge.movies {
    background-color: #FCE7F3;
    color: #9D174D;
    border-color: #EC4899;
}

.activity-type-badge.concert {
    background-color: #FEF3C7;
    color: #92400E;
    border-color: #F59E0B;
}

.activity-type-badge.walk {
    background-color: #D1FAE5;
    color: #065F46;
    border-color: #10B981;
}

.activity-type-badge.shopping {
    background-color: #FEF3C7;
    color: #92400E;
    border-color: #F59E0B;
}

.activity-type-badge.travel {
    background-color: #E0E7FF;
    color: #3730A3;
    border-color: #4F46E5;
}

.activity-type-badge.party {
    background-color: #FCE7F3;
    color: #9D174D;
    border-color: #EC4899;
}

.activity-type-badge.other {
    background-color: #F3F4F6;
    color: #374151;
    border-color: #9CA3AF;
}

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

/* ====================== */
/*   MOBILE RESPONSIVENESS IMPROVEMENTS
/* ====================== */

/* Tablets and below */
@media (max-width: 1024px) {
    .sidebar {
        display: none;
    }
    
    .main-content {
        margin-left: 0;
        padding: 1.5rem;
        padding-top: 5rem;    /* space for fixed mobile header */
        padding-bottom: 2rem;
    }
    
    .mobile-header {
        display: block;
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Make map shorter on tablets */
    #map {
        height: 400px;
    }
}

/* Medium-small screens (phones in landscape, small tablets) */
@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        padding: 1.25rem;
        padding-top: 4.5rem;
        padding-bottom: 1.5rem;
    }
    
    /* Reduce page header sizes */
    .page-header h1 {
        font-size: 1.75rem;
    }
    
    .page-header p {
        font-size: 1rem;
    }
    
    /* Make map smaller */
    #map {
        height: 350px;
    }
}

/* Small phones */
@media (max-width: 640px) {
    .main-content {
        padding: 1rem;
        padding-top: 4rem;
        padding-bottom: 1rem;
    }
    
    .page-header h1 {
        font-size: 1.5rem;
    }
    
    .page-header p {
        font-size: 0.95rem;
    }
    
    #map {
        height: 280px;
    }
    
    /* Buttons and forms touch-friendly */
    .btn {
        padding: 0.75rem 1rem;
        font-size: 1rem;
    }
    
    .btn-lg {
        padding: 1rem 1.5rem;
    }
    
    .form-input, .form-textarea, .form-select {
        padding: 0.75rem;
        font-size: 1rem;  /* prevent iOS zoom */
    }
    
    /* Modal takes full width on phones */
    .modal-content {
        max-width: 100%;
        margin: 0 0.5rem;
        border-radius: var(--radius-lg);
        max-height: 95vh;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 1rem;
    }
    
    .card-header,
    .card-content {
        padding: 1rem;
    }
}

/* Final override to remove Inter everywhere */
body, input, button, textarea, select {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 Oxygen, Ubuntu, Cantarell, "Open Sans", sans-serif !important;
}