/* ==========================================================================
   FINANZAS LOCAL - MODERN DARK FINANCIAL DASHBOARD SYSTEM
   ========================================================================== */

:root {
    /* Color Palette */
    --bg-main: #0b0f19;
    --bg-header: #111827;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --bg-input: #0f172a;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(99, 102, 241, 0.3);
    
    --accent-indigo: #6366f1;
    --accent-indigo-hover: #4f46e5;
    --accent-emerald: #10b981;
    --accent-emerald-hover: #059669;
    --accent-rose: #f43f5e;
    --accent-rose-hover: #e11d48;
    --accent-amber: #f59e0b;
    --accent-sky: #0ea5e9;
    --accent-purple: #a855f7;
    --accent-teal: #14b8a6;
    
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.25);
    
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* APP LOCKING BLUR */
#app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: filter 0.4s ease, opacity 0.4s ease;
}

#app-container.app-locked {
    filter: blur(12px);
    pointer-events: none;
    user-select: none;
    opacity: 0.2;
}

/* HEADER */
.app-header {
    background-color: var(--bg-header);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(12px);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-box {
    display: flex;
    align-items: center;
    gap: 12px;
}

.orvita-logo-svg {
    filter: drop-shadow(0 0 5px rgba(0, 242, 254, 0.45));
    transition: transform 0.3s ease, filter 0.3s ease;
}

.logo-box:hover .orvita-logo-svg {
    transform: scale(1.08);
    filter: drop-shadow(0 0 10px rgba(0, 242, 254, 0.8));
}

.logo-title {
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.1;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: block;
}

/* Period Picker */
.period-picker {
    display: flex;
    align-items: center;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    padding: 4px 8px;
    gap: 8px;
}

.period-display {
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-main);
    cursor: pointer;
}

.period-display i {
    color: var(--accent-indigo);
}

#hidden-month-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* NAV TABS */
.main-nav {
    background-color: #151d2a;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    padding: 0 24px;
    gap: 8px;
    overflow-x: auto;
    scrollbar-width: none;
}

.main-nav::-webkit-scrollbar {
    display: none;
}

.nav-tab {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 14px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-tab i {
    font-size: 1.05rem;
}

.nav-tab:hover {
    color: var(--text-main);
    background-color: rgba(255, 255, 255, 0.03);
}

.nav-tab.active {
    color: var(--accent-indigo);
    border-bottom-color: var(--accent-indigo);
}

/* MAIN CONTENT */
.main-content {
    flex: 1;
    padding: 24px;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* CARDS SYSTEM */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 20px;
}

/* KPI GRID */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.kpi-card {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.95));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.kpi-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.income-card::before { background-color: var(--accent-emerald); }
.expense-card::before { background-color: var(--accent-rose); }
.balance-card::before { background-color: var(--accent-indigo); }
.progress-summary-card::before { background-color: var(--accent-amber); }

.kpi-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;

    margin-bottom: 8px;
}

.kpi-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.income-card .kpi-icon { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); }
.expense-card .kpi-icon { background: rgba(244, 63, 94, 0.15); color: var(--accent-rose); }
.balance-card .kpi-icon { background: rgba(99, 102, 241, 0.15); color: var(--accent-indigo); }
.progress-summary-card .kpi-icon { background: rgba(245, 158, 11, 0.15); color: var(--accent-amber); }

.kpi-amount {
    font-family: 'Outfit', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 6px;
}

.kpi-subtext {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* Budget Meter Bar */
.budget-meter-bar {
    width: 100%;
    height: 8px;
    background-color: var(--bg-input);
    border-radius: var(--radius-full);
    margin-top: 10px;
    overflow: hidden;
}

.budget-meter-fill {
    height: 100%;
    background-color: var(--accent-emerald);
    border-radius: var(--radius-full);
    transition: width 0.6s ease, background-color 0.3s ease;
}

.budget-meter-fill.warning { background-color: var(--accent-amber); }
.budget-meter-fill.danger { background-color: var(--accent-rose); }

/* DASHBOARD GRID */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.grid-span-2 { grid-column: span 2; }
.grid-span-3 { grid-column: span 3; }

/* Category Budget Progress Bars Container */
.category-bars-container {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.cat-bar-item {
    background-color: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
}

.cat-bar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.cat-bar-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.95rem;
}

.cat-bar-title i {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
}

.cat-bar-amounts {
    font-size: 0.88rem;
    color: var(--text-muted);
}

.cat-bar-amounts strong {
    color: var(--text-main);
}

.cat-progress-track {
    width: 100%;
    height: 10px;
    background-color: var(--bg-input);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.cat-progress-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width 0.5s ease;
}

.cat-progress-fill.ok { background-color: var(--accent-emerald); }
.cat-progress-fill.warn { background-color: var(--accent-amber); }
.cat-progress-fill.exceeded { background-color: var(--accent-rose); }

.cat-bar-status-text {
    font-size: 0.78rem;
    margin-top: 6px;
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
}

/* Charts */
.chart-card-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 280px;
}

.chart-container {
    position: relative;
    width: 100%;
    max-height: 260px;
}

.chart-container-large {
    position: relative;
    width: 100%;
    height: 340px;
}

/* SECTION BANNER */
.section-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.6), rgba(17, 24, 39, 0.8));
    border: 1px solid var(--border-color);
    padding: 20px 24px;
    border-radius: var(--radius-md);
}

.banner-info h2 {
    font-size: 1.4rem;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.banner-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.banner-actions {
    display: flex;
    gap: 12px;
}

/* BUDGET SECTION */
.budget-totals-bar {
    display: flex;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px 24px;
    margin-bottom: 24px;
    justify-content: space-around;
}

.b-total-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.b-total-item span {
    font-size: 0.82rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.b-total-item strong {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
}

.budget-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 20px;
}

.budget-category-card {
    display: flex;
    flex-direction: column;
}

.budget-cat-header {
    background-color: rgba(15, 23, 42, 0.6);
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.cat-title {
    display: flex;
    align-items: center;
    gap: 10px;
}

.cat-title i {
    font-size: 1.2rem;
}

.cat-total-badge {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    font-size: 0.95rem;
}

.budget-cat-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex: 1;
}

.subcat-input-row {
    display: flex;
    align-items: center;
    gap: 12px;
    background-color: rgba(15, 23, 42, 0.4);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.subcat-input-row label {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
}

.subcat-input-row .input-euro-wrap {
    position: relative;
    width: 140px;
}

.subcat-input-row .input-euro-wrap input {
    padding-right: 24px;
    text-align: right;
}

.subcat-input-row .input-euro-wrap::after {
    content: '€';
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.85rem;
}

.delete-subcat-btn {
    color: var(--text-dim);
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    transition: var(--transition);
}

.delete-subcat-btn:hover {
    color: var(--accent-rose);
}

.cat-footer {
    padding: 10px 16px;
    border-top: 1px solid var(--border-color);
    background-color: rgba(15, 23, 42, 0.3);
}

/* TRANSACTIONS SECTION & TOOLBAR */
.toolbar-card {
    margin-bottom: 20px;
    padding: 16px 20px;
}

.filter-group {
    display: flex;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
}

.search-input-wrap {
    position: relative;
    flex: 1;
    min-width: 250px;
}

.search-input-wrap i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-input-wrap input {
    padding-left: 40px;
}

/* DATA TABLES */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.92rem;
}

.data-table th {
    background-color: rgba(15, 23, 42, 0.6);
    color: var(--text-muted);
    font-weight: 600;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    text-transform: uppercase;
    font-size: 0.78rem;
    letter-spacing: 0.05em;
}

.data-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.badge-type {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 600;
}

.badge-expense { background: rgba(244, 63, 94, 0.15); color: var(--accent-rose); }
.badge-income { background: rgba(16, 185, 129, 0.15); color: var(--accent-emerald); }

.amount-expense { color: var(--accent-rose); font-weight: 700; font-family: 'Outfit', sans-serif; }
.amount-income { color: var(--accent-emerald); font-weight: 700; font-family: 'Outfit', sans-serif; }

/* SETTINGS & BACKUP */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.backup-actions-wrap {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 20px;
}

.security-info-box {
    display: flex;
    flex-direction: column;
    gap: 12px;
    background-color: rgba(15, 23, 42, 0.6);
    padding: 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
}

/* FORM CONTROLS & BUTTONS */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

.form-control {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
    width: 100%;
}

.form-control:focus {
    border-color: var(--accent-indigo);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-row {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.92rem;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary { background-color: var(--accent-indigo); color: white; }
.btn-primary:hover { background-color: var(--accent-indigo-hover); box-shadow: var(--shadow-glow); }

.btn-success { background-color: var(--accent-emerald); color: white; }
.btn-success:hover { background-color: var(--accent-emerald-hover); }

.btn-secondary { background-color: #334155; color: var(--text-main); border-color: var(--border-color); }
.btn-secondary:hover { background-color: #475569; }

.btn-ghost { background: none; color: var(--accent-indigo); border: none; }
.btn-ghost:hover { background-color: rgba(99, 102, 241, 0.1); }

.btn-outline { background: none; border-color: var(--border-color); color: var(--text-main); }
.btn-outline:hover { background-color: rgba(255, 255, 255, 0.05); }

.btn-sm { padding: 6px 12px; font-size: 0.82rem; }
.btn-lg { padding: 14px 24px; font-size: 1rem; }
.btn-block { width: 100%; }

.btn-icon {
    background: none;
    border: none;
    color: var(--text-muted);
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.btn-icon:hover { color: var(--text-main); background-color: rgba(255, 255, 255, 0.1); }

.btn-link {
    background: none;
    border: none;
    color: var(--accent-indigo);
    cursor: pointer;
    font-size: 0.85rem;
    text-decoration: underline;
}

/* MODALS SYSTEM */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(3, 7, 18, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    padding: 16px;
}

.modal-backdrop.modal-active {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    animation: modalSlideUp 0.3s ease;
}

.security-modal-card {
    max-width: 440px;
}

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

.modal-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    background-color: rgba(15, 23, 42, 0.4);
}

.close-modal-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
}

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

/* Password input wrap */
.password-input-wrap {
    position: relative;
}

.password-input-wrap input {
    padding-right: 42px;
}

.toggle-password-btn {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
}

/* Recovery Key Display */
.recovery-key-display-card {
    background-color: var(--bg-input);
    border: 2px dashed var(--accent-amber);
    padding: 16px;
    border-radius: var(--radius-sm);
    text-align: center;
    margin: 16px 0;
}

.recovery-key-display-card code {
    font-family: monospace;
    font-size: 1.15rem;
    color: var(--accent-amber);
    letter-spacing: 0.1em;
    font-weight: 700;
}

.code-input {
    font-family: monospace;
    letter-spacing: 0.1em;
    text-align: center;
    font-weight: 700;
    text-transform: uppercase;
}

/* ALERTS & BADGES */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-danger { background: rgba(244, 63, 94, 0.15); border: 1px solid rgba(244, 63, 94, 0.3); color: var(--accent-rose); }
.alert-warning { background: rgba(245, 158, 11, 0.15); border: 1px solid rgba(245, 158, 11, 0.3); color: var(--accent-amber); }

.badge {
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 600;
}

.badge-success { background: rgba(16, 185, 129, 0.2); color: var(--accent-emerald); }
.badge-info { background: rgba(14, 165, 233, 0.2); color: var(--accent-sky); }
.badge-purple { background: rgba(168, 85, 247, 0.2); color: var(--accent-purple); }

/* TOAST NOTIFICATIONS */
#toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background-color: var(--bg-card);
    border: 1px solid var(--border-highlight);
    color: var(--text-main);
    padding: 14px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: toastIn 0.3s ease;
    max-width: 380px;
}

@keyframes toastIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* Type Toggle Bar in Modal */
.type-toggle-bar {
    display: flex;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 4px;
    gap: 4px;
}

.type-option {
    flex: 1;
    text-align: center;
    cursor: pointer;
}

.type-option input { display: none; }

.type-option span {
    display: block;
    padding: 8px 12px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--text-muted);
    transition: var(--transition);
}

.option-expense input:checked + span { background-color: var(--accent-rose); color: white; }
.option-income input:checked + span { background-color: var(--accent-emerald); color: white; }

/* Auth Modal Toggle Tabs */
.auth-tabs-toggle {
    display: flex;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 4px;
    gap: 4px;
    position: relative;
    z-index: 10;
}

.auth-tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 12px 10px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    user-select: none;
}

.auth-tab-btn.active {
    background-color: var(--accent-indigo);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}


/* UTILITY CLASSES */
.hidden { display: none !important; }
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-emerald { color: var(--accent-emerald); }
.text-rose { color: var(--accent-rose); }
.text-indigo { color: var(--accent-indigo); }
.text-amber { color: var(--accent-amber); }
.text-muted { color: var(--text-muted); }
.flex-1 { flex: 1; }
.flex-gap-sm { display: flex; gap: 8px; }
.margin-top-md { margin-top: 16px; }
.margin-top-lg { margin-top: 24px; }
.hide-mobile { display: inline; }
.empty-state { text-align: center; padding: 40px 20px; color: var(--text-muted); }

/* RESPONSIVE DESIGN */
@media (max-width: 1024px) {
    .dashboard-grid { grid-template-columns: 1fr; }
    .grid-span-2, .grid-span-3 { grid-column: span 1; }
}

@media (max-width: 768px) {
    .app-header {
        padding: 8px 12px;
        flex-wrap: nowrap;
        gap: 8px;
    }
    .header-left {
        gap: 8px;
    }
    .logo-title {
        font-size: 1.15rem;
    }
    .period-picker {
        padding: 2px 6px;
        gap: 4px;
    }
    .period-display {
        padding: 4px 8px;
        font-size: 0.85rem;
    }
    .header-right {
        margin-left: 0;
    }
    .hide-mobile { display: none; }

    .main-nav {
        padding: 0 12px;
        gap: 4px;
    }
    .nav-tab {
        padding: 10px 12px;
        font-size: 0.85rem;
        gap: 6px;
    }
    .main-content {
        padding: 12px;
    }

    /* Compact 2x2 KPI Grid for Mobile */
    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
        margin-bottom: 16px;
    }
    .kpi-card {
        padding: 12px;
        border-radius: var(--radius-sm);
    }
    .kpi-header {
        font-size: 0.72rem;
        margin-bottom: 4px;
    }
    .kpi-icon {
        width: 26px;
        height: 26px;
        font-size: 0.85rem;
    }
    .kpi-amount {
        font-size: 1.25rem;
        margin-bottom: 2px;
    }
    .kpi-subtext {
        font-size: 0.72rem;
    }

    .section-banner { flex-direction: column; align-items: flex-start; gap: 14px; padding: 14px 16px; }
    .banner-actions { width: 100%; flex-direction: column; }
    .budget-totals-bar { flex-direction: column; gap: 10px; align-items: flex-start; padding: 12px 16px; }
    .budget-categories-grid { grid-template-columns: 1fr; }
    .form-row { flex-direction: column; gap: 0; }
}