:root {
    --primary: #6c5ce7; --primary-light: #a29bfe; --primary-dark: #5649c0;
    --danger: #d63031; --warning: #fdcb6e; --info: #0984e3; --success: #23d160;

    --bg-color: #101727; 
    --text-color: #e6e6e6;
    
    --glass-bg: rgba(30, 41, 59, 0.5);
    --glass-border: rgba(162, 155, 254, 0.2);
    --glass-blur: 12px;
    
    --hover-color: rgba(162, 155, 254, 0.1);

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --spacing-sm: 0.5rem; --spacing-md: 1rem; --spacing-lg: 1.5rem; --spacing-xl: 2rem;
    
    --radius-md: 8px; --radius-lg: 12px; --radius-xl: 16px; --radius-full: 9999px;

    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.2);
    --z-modal: 1050; --z-toast: 1080; --z-fixed: 1030;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    font-family: var(--font-family); 
    background-color: var(--bg-color);
    color: var(--text-color); 
    line-height: 1.6; 
    overflow: hidden; 
    position: relative;
}
body::before, body::after {
    content: '';
    position: fixed;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    filter: blur(150px);
    z-index: -1;
    opacity: 0.6;
}
body::before {
    background: var(--primary-dark);
    top: -100px;
    left: -150px;
}
body::after {
    background: var(--success);
    bottom: -150px;
    right: -100px;
}

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
*:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; border-radius: var(--radius-md); }
.modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.5); display: flex; justify-content: center; align-items: center; z-index: var(--z-modal); opacity: 0; visibility: hidden; transition: opacity 0.3s ease; }
.modal.show { opacity: 1; visibility: visible; }
.modal-content { 
    padding: var(--spacing-xl); 
    border-radius: var(--radius-xl); 
    width: 100%; 
    max-width: 450px; 
    margin: var(--spacing-md); 
    box-shadow: var(--shadow-lg); 
    position: relative; 
    transform: scale(0.95); 
    transition: transform 0.3s ease;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
}
.modal.show .modal-content { transform: scale(1); }
.close-modal { position: absolute; top: var(--spacing-md); right: var(--spacing-md); background: none; border: none; color: var(--text-color); font-size: 1.5rem; cursor: pointer; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; border-radius: var(--radius-md); transition: background-color 0.15s ease; }
.close-modal:hover { background-color: var(--hover-color); }
.modal h3 { margin-bottom: var(--spacing-lg); text-align: center; font-size: 1.5rem; font-weight: 700; }
.form-group { margin-bottom: var(--spacing-lg); }
.form-group label { display: block; margin-bottom: var(--spacing-sm); font-weight: 600; font-size: 0.9rem; }
.required { color: var(--danger); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 0.75rem 1rem; border: 1px solid var(--glass-border); border-radius: var(--radius-md); background: rgba(0,0,0,0.2); color: var(--text-color); font-size: 1rem; transition: all 0.2s; font-family: inherit; }
.form-group select { appearance: none; -webkit-appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23e6e6e6' class='bi bi-chevron-down' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 1rem center; }
.form-group select option { background-color: #101727; color: var(--text-color); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--primary); outline: none; box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.1); }
.btn { padding: 0.75rem 1.5rem; border: none; border-radius: var(--radius-md); cursor: pointer; font-weight: 600; font-size: 1rem; display: inline-flex; align-items: center; justify-content: center; gap: var(--spacing-sm); transition: all 0.2s; min-height: 48px; text-decoration: none; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: white; }
.btn-primary:hover:not(:disabled) { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-secondary { background: var(--glass-bg); color: var(--text-color); border: 1px solid var(--glass-border); }
.btn-secondary:hover:not(:disabled) { background-color: var(--hover-color); }
.btn-danger { background-color: var(--danger); color: white; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.link-button { background: none; border: none; color: var(--primary); cursor: pointer; text-decoration: underline; font-weight: 600; }
.switch-form { text-align: center; margin-top: var(--spacing-lg); font-size: 0.9rem; }
.hidden { display: none !important; }
.app-container { display: none; height: 100vh; width: 100vw; }
.app-container.show { display: flex; }
.sidebar { width: 260px; display: flex; flex-direction: column; transition: all 0.3s ease; padding: var(--spacing-lg); background: var(--glass-bg); backdrop-filter: blur(var(--glass-blur)); -webkit-backdrop-filter: blur(var(--glass-blur)); border-right: 1px solid var(--glass-border); }
.branding { display: flex; align-items: center; gap: var(--spacing-sm); margin-bottom: 2rem; }
.branding i { font-size: 2rem; color: var(--primary); }
.branding h2 { font-size: 1.5rem; font-weight: 800; }
.main-nav ul { list-style: none; }
.main-nav li { margin-bottom: var(--spacing-sm); }
.nav-link { display: flex; align-items: center; gap: var(--spacing-md); padding: 0.8rem 1rem; border-radius: var(--radius-lg); text-decoration: none; color: var(--text-color); transition: all 0.2s; font-weight: 500; opacity: 0.8;}
.nav-link:hover { background: var(--hover-color); opacity: 1; }
.nav-link.active { background: var(--primary); color: white; font-weight: 600; opacity: 1;}
.nav-link i { width: 24px; text-align: center; }
.user-section { margin-top: auto; display: flex; align-items: center; gap: var(--spacing-md); padding-top: var(--spacing-lg); border-top: 1px solid var(--glass-border); }
.user-avatar { width: 48px; height: 48px; border-radius: 50%; background: var(--primary-dark); color: white; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 1.1rem; }
.user-info { flex: 1; min-width: 0; }
.user-name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-email { font-size: 0.8rem; opacity: 0.7; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.logout-btn { background: none; border: none; color: var(--text-color); cursor: pointer; opacity: 0.7; transition: opacity 0.2s; font-size: 1.1rem; }
.logout-btn:hover { opacity: 1; transform: scale(1.1); }
.main-content { flex: 1; padding: var(--spacing-xl); overflow-y: auto; }
.content-section { display: none; }
.content-section.active { display: block; animation: fadeIn 0.5s; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.page-header h2 { font-size: 2.5rem; font-weight: 800; color: var(--text-color); }
.page-actions { display: flex; gap: var(--spacing-md); align-items: center; }
.balance-card { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: white; padding: var(--spacing-xl); border-radius: var(--radius-xl); margin-bottom: 2rem; box-shadow: var(--shadow-lg); }
.balance-card h4 { opacity: 0.8; font-weight: 500; margin-bottom: 0.5rem; text-transform: uppercase; letter-spacing: 1px; }
.balance-card .amount { font-size: 3rem; font-weight: 700; }
.balance-card .monthly-change { font-size: 1rem; opacity: 0.9; margin-top: 0.5rem; }
.balance-card .monthly-change.positive { color: #55efc4; }
.balance-card .monthly-change.negative { color: #fab1a0; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--spacing-lg); margin-bottom: 2rem; }
.stat-card, .account-card, .category-card, #calendar-container { background: var(--glass-bg); backdrop-filter: blur(var(--glass-blur)); -webkit-backdrop-filter: blur(var(--glass-blur)); border: 1px solid var(--glass-border); padding: var(--spacing-lg); border-radius: var(--radius-lg); }
.stat-card h5 { font-size: 0.9rem; opacity: 0.8; margin-bottom: var(--spacing-sm); text-transform: uppercase; }
.stat-card .amount { font-size: 1.75rem; font-weight: 600; }
.stat-card .amount.negative { color: var(--danger); }
.section-heading { display: flex; justify-content: space-between; align-items: center; margin-top: 2rem; margin-bottom: 1.5rem; }
.section-heading h3 { font-size: 1.75rem; font-weight: 800; background: linear-gradient(90deg, var(--text-color) 60%, var(--primary-light) 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; text-emphasis-color: transparent;}
.search-add-wrapper { display: flex; align-items: center; gap: var(--spacing-md); }
.search-box { position: relative; flex-grow: 1; }
.search-box .fa-search { position: absolute; left: 1rem; top: 50%; transform: translateY(-50%); opacity: 0.5; }
.search-box input { border-radius: var(--radius-md); border: 1px solid var(--glass-border); height: 48px; background-color: rgba(0,0,0,0.2); padding-left: 2.5rem; }
.search-box input:focus { border-color: var(--primary); }
.add-btn { border-radius: 50%; background: var(--success); color: var(--bg-color); width: 48px; height: 48px; padding: 0; flex-shrink: 0; border: none; transition: filter 0.2s; font-size: 1.2rem;}
.add-btn:hover:not(:disabled) { filter: brightness(1.15); transform: none; box-shadow: none;}
.categories-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: var(--spacing-lg); }
.category-card:hover { transform: translateY(-5px); border-color: var(--primary-light);}
.category-header { display: flex; align-items: center; gap: var(--spacing-md); margin-bottom: var(--spacing-md); }
.category-icon { width: 40px; height: 40px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; color: white; font-size: 1.1rem; }
.category-name { font-weight: 600; flex: 1; }
.category-actions button { background: none; border: none; color: var(--text-color); opacity: 0.6; cursor: pointer; transition: opacity 0.15s ease; }
.category-actions button:hover { opacity: 1; }
.progress-bar { width: 100%; height: 8px; background-color: rgba(0,0,0,0.2); border-radius: 4px; overflow: hidden; margin: var(--spacing-sm) 0; }
.progress-fill { height: 100%; transition: width 0.3s ease; }
.progress-labels { display: flex; justify-content: space-between; font-size: 0.8rem; opacity: 0.8; }
.loading::after { content: ''; position: absolute; top: 50%; left: 50%; width: 20px; height: 20px; margin: -10px 0 0 -10px; border: 2px solid var(--text-color); border-top-color: transparent; border-radius: 50%; animation: spin 1s linear infinite; }
.btn.loading { color: transparent !important; }
@keyframes spin { to { transform: rotate(360deg); } }
.fc { --fc-border-color: var(--glass-border); --fc-daygrid-event-dot-width: 8px; --fc-list-event-dot-width: 10px; --fc-event-bg-color: var(--primary); --fc-event-border-color: var(--primary-dark); --fc-button-bg-color: var(--primary); --fc-button-border-color: var(--primary); --fc-button-hover-bg-color: var(--primary-dark); --fc-button-active-bg-color: var(--primary-dark); --fc-today-bg-color: rgba(108, 92, 231, 0.15); font-size: 0.9rem; color: var(--text-color); }
.fc .fc-toolbar-title { font-size: 1.5em; font-weight: 600; color: var(--text-color); }
.fc .fc-daygrid-day-number { padding: 0.5em; color: var(--text-color); }
.fc .fc-button { color: white !important; }
.fc-event-main-frame { cursor: pointer; }
.fc-day-other .fc-daygrid-day-top { opacity: 0.5; }
.fc-daygrid-day, .fc-timegrid-slot { cursor: pointer; }
.toast-container { position: fixed; top: var(--spacing-xl); right: var(--spacing-xl); z-index: var(--z-toast); display: flex; flex-direction: column; gap: var(--spacing-md); }
.toast { background: var(--glass-bg); backdrop-filter: blur(var(--glass-blur)); -webkit-backdrop-filter: blur(var(--glass-blur)); border-left: 5px solid var(--info); border-radius: var(--radius-lg); padding: var(--spacing-lg); box-shadow: var(--shadow-lg); transform: translateX(120%); opacity: 0; transition: all 0.3s ease; display: flex; align-items: flex-start; gap: var(--spacing-md); min-width: 300px; }
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }
.toast.warning { border-color: var(--warning); }
.toast.show { transform: translateX(0); opacity: 1; }
.toast-close { background: none; border: none; color: var(--text-color); cursor: pointer; margin-left: auto; }
#aiInsightsContainer { margin-top: 2rem; background: var(--glass-bg); backdrop-filter: blur(var(--glass-blur)); -webkit-backdrop-filter: blur(var(--glass-blur)); padding: var(--spacing-xl); border-radius: var(--radius-xl); display: none; border: 1px solid var(--glass-border); }
#aiInsightsContent { white-space: pre-wrap; line-height: 1.7; }

/* Accounts Section */
.accounts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--spacing-lg); margin-bottom: var(--spacing-xl); }
.account-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.account-info h5 { text-transform: uppercase; opacity: 0.7; font-size: 0.9rem; }
.account-info .amount { font-size: 2rem; font-weight: 700; }
.account-actions {
    display: flex;
    align-items: center;
}
.account-actions button { background-color: rgba(0,0,0,0.2); border: none; width: 40px; height: 40px; border-radius: var(--radius-md); margin-left: var(--spacing-sm); cursor: pointer; transition: background-color 0.15s ease; color: var(--text-color); }
.account-actions button:hover { background-color: var(--hover-color); }

/* Calendar Section - FIX: Changed selector from #calendar-section to #calendar-section.active */
#calendar-section.active {
    display: flex; /* This will now only apply when the calendar section is active */
    flex-direction: column;
    height: calc(100vh - (var(--spacing-xl) * 2)); 
}
/* This rule is fine as it targets a child element */
#calendar-section .page-header {
    flex-shrink: 0;
}
#calendar-container {
    flex-grow: 1;
    min-height: 0; /* Important for proper flex scaling in a flex container */
}

/* Transactions Table */
.transactions-table { width: 100%; border-collapse: collapse; margin-top: var(--spacing-lg); }
.transactions-table th, .transactions-table td { padding: var(--spacing-md); text-align: left; border-bottom: 1px solid var(--glass-border); }
.transactions-table th { font-weight: 600; opacity: 0.8; font-size: 0.9rem; text-transform: uppercase; }
.transactions-table td { vertical-align: middle; }
.transactions-table .method-icon { font-size: 1.2rem; text-align: center; }
.danger-zone { border: 2px solid var(--danger); border-radius: var(--radius-lg); padding: var(--spacing-lg); margin-top: var(--spacing-xl); }

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar { position: fixed; top: 0; left: -280px; height: 100vh; z-index: var(--z-fixed); box-shadow: var(--shadow-lg); }
    .sidebar.active { left: 0; }
    .main-content { padding: var(--spacing-lg); }
    .page-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
    .page-header h2 { font-size: 2rem; }
    .stats-grid, .categories-grid, .accounts-grid { grid-template-columns: 1fr; }
    .fc .fc-toolbar { flex-direction: column; gap: var(--spacing-md); }
    /* Revert to auto height on mobile where the flexbox height calculation is less critical */
    #calendar-section.active { height: auto; } 
}
/* STYLES FOR NEW ICON PICKER */
.icon-picker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(45px, 1fr));
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.icon-picker-btn {
    background-color: var(--background-alt);
    border: 2px solid transparent;
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease-in-out;
}

.icon-picker-btn:hover {
    background-color: var(--primary-light);
    border-color: var(--primary);
}

.icon-picker-btn.active {
    background-color: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* FIX: The duplicated block of CSS that was here has been removed. */
