:root {
    /* LIGHT THEME (Default) */
    --primary: #2563eb;
    --bg: #f8fafc;
    --surface: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --input-bg: #ffffff;
}

/* DARK THEME OVERRIDES */
[data-theme="dark"] {
    --primary: #3b82f6;
    --bg: #0f172a;
    --surface: #1e293b;
    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --border: #334155;
    --success: #34d399;
    --danger: #f87171;
    --warning: #fbbf24;
    --input-bg: #0f172a;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 0;
    line-height: 1.5;
    transition: background 0.3s, color 0.3s;
}

/* [UPDATED] Increased Max-Width to allow more tabs to fit */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.header-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

h1,
h2,
h3 {
    margin: 0;
}

/* Dashboard & Grids */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: var(--surface);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    position: relative;
    transition: background 0.3s, border-color 0.3s;
    border: 1px solid transparent;
}

[data-theme="dark"] .card {
    box-shadow: none;
    border: 1px solid var(--border);
}

.card.archived {
    opacity: 0.6;
    background: var(--bg);
    border: 1px dashed var(--border);
}

.card.archived::after {
    content: '(Archived)';
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: bold;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 5px;
}

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

.negative {
    color: var(--danger);
}

.neutral {
    color: var(--warning);
}

/* [UPDATED] Navigation Tabs with Custom Scrollbar */
.nav-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 10px;
    overflow-x: auto;

    /* Smooth scrolling */
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    /* Firefox */
    scrollbar-color: var(--border) transparent;
}

/* Chrome/Safari/Edge Scrollbar Styling */
.nav-tabs::-webkit-scrollbar {
    height: 4px;
    /* Very thin height */
}

.nav-tabs::-webkit-scrollbar-track {
    background: transparent;
}

.nav-tabs::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
}

.nav-tabs::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.tab-btn {
    background: none;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-secondary);
    border-radius: 6px;
    white-space: nowrap;
    transition: color 0.3s;
}

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

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

/* Filter Bar */
.filter-bar {
    display: flex;
    gap: 10px;
    align-items: center;
    background: var(--surface);
    padding: 10px 15px;
    border-radius: 8px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
    flex-wrap: wrap;
    border: 1px solid var(--border);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Tables */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    min-width: 600px;
}

th,
td {
    text-align: left;
    padding: 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

th {
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Buttons & Forms */
.btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
}

.btn:hover {
    opacity: 0.9;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 0.8rem;
}

.btn-secondary {
    background: var(--border);
    color: var(--text);
}

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

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

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

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 5px;
    margin-left: 5px;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.btn-icon:hover {
    color: var(--text);
    background: var(--border);
    border-radius: 4px;
}

input,
select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    background: var(--input-bg);
    color: var(--text);
    border-radius: 6px;
    font-size: 1rem;
    box-sizing: border-box;
    margin-bottom: 10px;
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    margin-bottom: 10px;
    cursor: pointer;
}

.checkbox-wrapper input {
    width: auto;
    margin: 0;
    cursor: pointer;
}

/* Split Logic Styles */
.split-row {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 10px;
}

.split-amount.locked {
    background-color: rgba(37, 99, 235, 0.1);
    border-color: var(--primary);
    font-weight: 500;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100dvh;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(2px);
}

.modal.open {
    display: flex;
}

.modal-content {
    background: var(--surface);
    padding: 30px;
    border-radius: 12px;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--border);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Utility */
.hidden {
    display: none !important;
}

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

.detail-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.back-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
}

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

.tag-fund {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.tag-cat {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
}

/* Credit Card Visuals */
.cc-top-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 5px;
}

.cc-last4 {
    font-family: monospace;
    font-size: 0.85rem;
    color: var(--text);
    background: var(--border);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
}

.progress-track {
    background: var(--border);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    margin-top: 8px;
    margin-bottom: 4px;
    width: 100%;
}

.progress-fill {
    height: 100%;
    background: var(--warning);
    transition: width 0.3s ease;
}

/* LOGIN SCREEN & OVERLAYS */
.auth-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    min-height: 100dvh;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.login-card {
    background: var(--surface);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    width: 70%;
    max-width: 400px;
    border: 1px solid var(--border);
    text-align: center;
}

.login-card h2 {
    margin-bottom: 20px;
    color: var(--primary);
}

.login-card input {
    margin-bottom: 15px;
}

/* ADMIN USER CARDS */
.user-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.role-badge {
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: bold;
    text-transform: uppercase;
}

.role-admin {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.role-user {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

/* Header Profile Section */
.profile-section {
    display: flex;
    align-items: center;
    gap: 10px;
}

.profile-name {
    font-weight: 600;
    font-size: 0.9rem;
}

/* PASSWORD FIELD STYLING */
.password-wrapper {
    position: relative;
    width: 100%;
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.password-wrapper input {
    width: 100%;
    padding-right: 45px;
    margin-bottom: 0;
    box-sizing: border-box;
    height: 42px;
}

.password-toggle-btn {
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    width: 40px;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: color 0.2s;
    border-radius: 0 6px 6px 0;
}

.password-toggle-btn:hover {
    color: var(--primary);
    background: rgba(0, 0, 0, 0.02);
}

.password-toggle-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* --- RESPONSIVE HEADER FOR MOBILE --- */
@media (max-width: 600px) {

    /* 1. Stack Logo and Actions vertically */
    header {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
        margin-bottom: 20px;
    }

    /* 2. Allow actions to wrap nicely */
    .header-actions {
        flex-wrap: wrap;
        gap: 10px;
        width: 100%;
    }

    /* 3. Give Profile its own "Card" look */
    .profile-section {
        width: 100%;
        background: var(--surface);
        border: 1px solid var(--border);
        padding: 8px 12px;
        border-radius: 8px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        order: 1;
        /* Ensure it appears at the top of the actions block */
    }

    /* 4. Theme toggle sits next to the main button or floats */
    #theme-toggle {
        order: 2;
        padding: 10px;
        background: var(--surface);
        border-radius: 8px;
        border: 1px solid var(--border);
        width: 45px;
        /* Fixed square width */
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* 5. Make the Main Action Button Big and Tappable */
    .header-actions .btn {
        order: 3;
        flex-grow: 1;
        /* Fill the rest of the row */
        text-align: center;
        padding: 12px;
        /* Taller touch target */
    }
}

/* --- DRAG & DROP REORDERING --- */
[draggable="true"] {
    cursor: grab;
}

[draggable="true"]:active {
    cursor: grabbing;
}

.dragging {
    opacity: 0.5;
    transform: scale(0.98);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    border: 2px dashed var(--primary);
}

.drag-over {
    border-left: 4px solid var(--primary) !important;
}

/* Ensure grids handle drag drop smoothly */
.dashboard-grid {
    transition: all 0.2s ease;
}