:root {
    /* Dark Theme (Default) */
    --bg-main: #0A192F;
    --bg-card: #112240;
    --bg-sidebar: #020C1B;
    --text-primary: #F9FAFB;
    --text-secondary: #8892B0;
    --text-muted: #495670;
    --border-color: #233554;
    --card-shadow: 0 10px 30px -15px rgba(2, 12, 27, 0.7);

    /* Shared Accents */
    --accent-gold: #FFB800;
    --accent-primary: var(--accent-gold); 
    --accent-hover: #E5A500;
    --accent-glow: rgba(255, 184, 0, 0.25);
    --success: #64FFDA;
    --danger: #FF4D4D;
    --warning: #F59E0B;
}

[data-theme="light"] {
    display: none; /* Reverting light theme */
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

/* Base Layout */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 24px;
    transition: all 0.3s ease;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: #FFFFFF;
}

.logo .icon {
    font-size: 1.5rem;
}

.sidebar nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.sidebar .nav-link {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    margin-bottom: 4px;
    transition: all 0.2s ease;
    font-weight: 500;
}
.sidebar .nav-link:hover {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}
.sidebar .nav-link.active {
    background: var(--accent-primary);
    color: var(--bg-main);
    box-shadow: 0 4px 12px var(--accent-glow);
    font-weight: 700;
}
.sidebar .nav-link.active .icon svg {
    stroke: var(--bg-main);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 4px; /* Sharper business look */
    background: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.1rem;
}

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

.user-profile .role {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Main Content */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 32px 48px;
    padding-bottom: 120px; /* Extra space at the bottom */
    background-color: #000000;
    -webkit-overflow-scrolling: touch; /* Smooth scrolling for iOS */
}

.main-content::-webkit-scrollbar {
    width: 6px;
}
.main-content::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 0px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #FFFFFF;
}

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

/* Dashboard Cards */
.dashboard-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 24px;
    box-shadow: var(--card-shadow);
    transition: transform 0.2s ease, border-color 0.2s ease;
    display: flex;
    flex-direction: column;
}

.card:hover {
    border-color: rgba(16, 185, 129, 0.3);
}

.balance-card {
    border-top: 3px solid var(--accent-primary);
}

.card h3 {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 24px;
    font-weight: 700;
}

.card .amount {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #FFFFFF;
}

.card .trend {
    font-size: 0.85rem;
    color: var(--success);
    display: flex;
    align-items: center;
    gap: 4px;
}

.card .subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Layout Grid */
.content-grid {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 32px;
}

/* Specific for Dashboard Intelligence */
.intelligence-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 32px;
    align-items: stretch; /* Force same height */
}

@media (max-width: 1200px) {
    .intelligence-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .intelligence-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
}

.section-header {
    margin-bottom: 16px;
}

.section-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #FFFFFF;
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 20px;
}

input[type="text"], 
input[type="number"], 
input[type="date"], 
input[type="password"],
select {
    width: 100%;
    padding: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s ease;
}

input:focus, select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-wrapper input:focus {
    background: rgba(255, 255, 255, 0.05);
}

.select-wrapper {
    position: relative;
}

.select-wrapper::after {
    content: '▼';
    font-size: 0.6rem;
    color: var(--accent-primary);
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-group input, .form-group select {
    width: 100%;
    padding: 10px 14px;
    background: #000000;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

/* Input with Prefix */
.input-with-prefix {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-prefix .prefix {
    position: absolute;
    left: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    pointer-events: none;
}

.input-with-prefix input {
    padding-left: 28px !important;
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 1px var(--accent-primary);
}

.form-group select option {
    background: var(--bg-main);
    color: var(--text-primary);
}

.btn-primary {
    background: linear-gradient(135deg, #FFD700 0%, #FFB800 100%);
    color: #020C1B; /* Very dark navy for maximum contrast */
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    width: 100%;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}
.btn-primary:hover {
    background: linear-gradient(135deg, #FFB800 0%, #E5A500 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px var(--accent-glow);
}
.btn-primary:active {
    transform: translateY(0);
}

/* Tables / Lists */
.table-container {
    display: flex;
    flex-direction: column;
}

.transaction-item {
    background: var(--bg-card);
    padding: 16px 0;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 16px;
    border-bottom: 1px solid var(--border-color);
}

.transaction-item:last-child {
    border-bottom: none;
}

.tx-icon {
    width: 36px;
    height: 36px;
    border-radius: 4px;
    background: #171717;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    border: 1px solid var(--border-color);
}

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

.tx-desc {
    font-weight: 600;
    font-size: 0.95rem;
    color: #FFFFFF;
}

.tx-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    gap: 12px;
}

.tx-amount {
    font-weight: 600;
    font-size: 1.05rem;
    color: #FFFFFF;
}

.empty-state {
    padding: 40px 20px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.95rem;
    background: var(--bg-card);
    border: 1px dashed var(--border-color);
    border-radius: 4px;
}

.delete-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: 4px;
    transition: all 0.2s;
}

.delete-btn:hover {
    color: var(--danger);
    border-color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

/* Category Breakdown Statistics */
.breakdown-card {
    grid-column: 1 / -1;
}

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

.breakdown-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.breakdown-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: 500;
    color: #E5E7EB;
}

.breakdown-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.breakdown-fill {
    height: 100%;
    background: var(--accent-primary);
    border-radius: 4px;
    transition: width 0.5s ease-out;
}

/* SPA Subpage Routing */
.page-view {
    display: none;
    animation: fadeIn 0.3s ease;
}

.page-view.active-page {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Authentication Styles */
.auth-container {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
    background-color: var(--bg-sidebar);
    overflow-y: auto;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--card-shadow);
    animation: fadeIn 0.4s ease;
}

.auth-card.hidden {
    display: none;
}

.auth-logo {
    justify-content: center;
    margin-bottom: 24px;
}

.auth-card h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
    text-align: center;
}

.auth-subtitle {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 32px;
    font-size: 0.9rem;
}

.auth-links {
    margin-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.auth-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.auth-links a:hover {
    color: var(--text-primary);
}

/* Password Checklist Styles */
.password-checklist {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.requirement {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.requirement::before {
    content: '✖';
    color: var(--danger);
    font-weight: bold;
    display: inline-block;
    width: 14px;
}

.requirement.valid {
    color: var(--success);
}

.requirement.valid::before {
    content: '✔';
    color: var(--success);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(1);
}

.password-field-wrapper {
    position: relative;
    width: 100%;
}

.password-field-wrapper input {
    padding-right: 48px !important; /* Space for the toggle button */
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
    z-index: 10;
}

.password-toggle:hover {
    color: var(--text-primary);
}

/* Timeframe Toggles */
.btn-toggle {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.85em;
    font-family: inherit;
    transition: all 0.2s ease;
}
.btn-toggle.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-main); /* Dark text on gold */
    font-weight: 600;
}
.btn-toggle:hover:not(.active) {
    color: var(--text-primary);
    background: var(--bg-main);
}

/* Base list item structures */
.list-item-card {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Savings specific */
.savings-goal-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.goal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}
.goal-title { font-weight: 600; font-size: 1.1em; color: var(--text-primary); margin-bottom: 4px; }
.goal-amounts { font-size: 0.9em; color: var(--text-secondary); }
.goal-progress-wrap {
    height: 8px;
    background: var(--bg-main);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 4px;
}
.goal-progress {
    height: 100%;
    background: #10B981;
    border-radius: 4px;
    transition: width 0.3s ease;
}
.goal-add-funds {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}
.goal-add-funds input {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 6px;
    flex: 1;
}
.goal-add-funds button {
    background: #10B981;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
}
.goal-delete-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    opacity: 0.6;
}
.goal-delete-btn:hover {
    color: var(--danger);
    opacity: 1;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75em;
    font-weight: 600;
    text-transform: uppercase;
}
.badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: #F59E0B;
    border: 1px solid rgba(245, 158, 11, 0.2);
}
.badge-success {
    background: rgba(16, 185, 129, 0.1);
    color: #10B981;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* Transaction Tabs */
.tx-type-tabs .tx-tab {
    background: transparent;
    color: var(--text-secondary);
}
.tx-type-tabs .tx-tab#tab-expense.active {
    background: var(--accent-primary);
    color: var(--bg-main);
    box-shadow: 0 4px 10px rgba(255, 184, 0, 0.2);
}
.tx-type-tabs .tx-tab#tab-income.active {
    background: var(--success);
    color: var(--bg-main);
    box-shadow: 0 4px 10px rgba(100, 255, 218, 0.2);
}