:root {
    --bg-color: #0b0f19;
    --surface-color: #151d30;
    --surface-hover: #1e2942;
    --primary-color: #6366f1; /* Beautiful Indigo */
    --primary-glow: rgba(99, 102, 241, 0.15);
    --secondary-color: #10b981; /* Emerald green */
    --secondary-glow: rgba(16, 185, 129, 0.15);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #1e293b;
    --input-bg: #0f172a;
    
    --error-color: #f43f5e;
    --error-glow: rgba(244, 63, 94, 0.15);
    --success-color: #10b981;
    --warning-color: #f59e0b;
    
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    padding-bottom: 80px; /* Safe space for mobile bottom nav */
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-smooth);
}

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--text-primary);
}

/* Layout Container */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem 1rem;
}

/* Top Navbar (Desktop focused) */
.top-nav {
    background-color: rgba(21, 29, 48, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.top-nav .logo span {
    color: var(--primary-color);
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-smooth);
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    background-color: var(--surface-hover);
}

/* Google Profile in Nav */
.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background-color: var(--surface-hover);
    padding: 0.35rem 0.8rem 0.35rem 0.35rem;
    border-radius: 30px;
    border: 1px solid var(--border-color);
}

.profile-pic {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid rgba(255,255,255,0.1);
}

.profile-pic-placeholder {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.user-name {
    font-size: 0.85rem;
    font-weight: 600;
    max-width: 120px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.btn-logout {
    color: var(--error-color);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(244, 63, 94, 0.2);
    background-color: rgba(244, 63, 94, 0.05);
}

.btn-logout:hover {
    background-color: var(--error-color);
    color: #fff;
}

.mobile-user-header {
    display: none; /* Desktop hidden */
}

/* Cards & Grid */
.card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.dashboard-title-area h1 {
    font-size: 2rem;
    letter-spacing: -0.03em;
}

.dashboard-title-area .subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    align-items: start;
}

@media (min-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr 1.8fr;
    }
    body {
        padding-bottom: 0; /* No bottom nav space needed on desktop */
    }
}

/* Buttons */
.btn-primary, .btn-secondary {
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.65rem 1.25rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 4px 14px 0 var(--primary-glow);
}

.btn-primary:hover {
    background-color: #4f46e5;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px 0 var(--primary-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: var(--surface-hover);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: rgba(255,255,255,0.05);
    border-color: var(--text-secondary);
}

.btn-spark {
    position: relative;
    overflow: hidden;
}

.btn-spark::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 50%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: 0.5s;
}

.btn-spark:hover::before {
    left: 150%;
}

.spark-icon {
    margin-right: 0.4rem;
}

/* Summary Cards specific */
.balance-card {
    position: relative;
    overflow: hidden;
}

.balance-card h3 {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.balance-value {
    font-size: 2.75rem;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.balance-value.positive { color: var(--success-color); }
.balance-value.negative { color: var(--error-color); }

.summary-split-card {
    display: flex;
    padding: 1.25rem;
    justify-content: space-around;
    align-items: center;
}

.summary-split-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
    justify-content: center;
}

.summary-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.summary-icon svg {
    width: 24px;
    height: 24px;
}

.summary-icon.income {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}
.summary-icon.income svg {
    fill: currentColor;
    transform: rotate(180deg);
}

.summary-icon.expense {
    background-color: rgba(244, 63, 94, 0.1);
    color: var(--error-color);
}
.summary-icon.expense svg {
    fill: currentColor;
}

.vertical-divider {
    width: 1px;
    height: 40px;
    background-color: var(--border-color);
}

.summary-split-item h4 {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.amount {
    font-size: 1.15rem;
    font-weight: 700;
}
.amount.income { color: var(--success-color); }
.amount.expense { color: var(--error-color); }

/* Movements list */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}

.movements-list {
    display: flex;
    flex-direction: column;
}

.movement-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-smooth);
}

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

.movement-main-info {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    flex: 1;
    min-width: 0; /* Fix overflow text */
}

.movement-description-group {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.movement-description {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 180px;
}

.movement-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.movement-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.category-tag {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: 20px;
    background-color: rgba(var(--cat-color), 0.1);
    color: var(--cat-color);
    border: 1px solid rgba(var(--cat-color), 0.35);
    /* For hex color support fallback in styled vars */
    background-color: var(--cat-color);
    filter: brightness(1.2);
    color: #0b0f19;
    padding: 1px 7px;
}

.movement-actions-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

.item-actions {
    display: flex;
    gap: 0.35rem;
    opacity: 0.6;
    transition: var(--transition-smooth);
}

.movement-item:hover .item-actions {
    opacity: 1;
}

.action-btn-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--border-radius-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.action-btn-icon svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.action-btn-icon:hover {
    color: var(--primary-color);
    background-color: var(--surface-hover);
}

.action-btn-icon.delete-btn:hover {
    color: var(--error-color);
    background-color: rgba(244, 63, 94, 0.1);
}

.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--text-secondary);
}

.empty-icon {
    width: 48px;
    height: 48px;
    fill: currentColor;
    margin-bottom: 0.75rem;
    opacity: 0.4;
}

/* Modals / Styled native Dialog */
.styled-dialog {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    margin: auto;
    padding: 1.5rem;
    width: 92%;
    max-width: 480px;
    color: var(--text-primary);
    overflow: visible;
}

.styled-dialog::backdrop {
    background-color: rgba(11, 15, 25, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: backdropFadeIn 0.25s ease-out;
}

@keyframes backdropFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Native dialog animations */
.styled-dialog[open] {
    animation: dialogScaleIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes dialogScaleIn {
    from {
        transform: scale(0.95);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.dialog-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    position: relative;
}

.close-dialog-btn {
    background: transparent;
    border: none;
    font-size: 1.75rem;
    font-weight: 500;
    cursor: pointer;
    color: var(--text-secondary);
    line-height: 1;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.close-dialog-btn:hover {
    background-color: var(--surface-hover);
    color: var(--text-primary);
}

.dialog-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.dialog-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: -0.75rem;
    margin-bottom: 0.5rem;
}

.dialog-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: flex-end;
    margin-top: 0.5rem;
}

.dialog-actions button {
    padding: 0.6rem 1.25rem;
}

/* Form Styling within dialogue */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-row {
    display: flex;
    gap: 0.75rem;
}

.form-group.col {
    flex: 1;
}

label {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

input[type="text"],
input[type="number"],
input[type="date"],
input[type="time"],
textarea,
select {
    font-family: inherit;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 0.7rem 0.85rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    width: 100%;
    transition: var(--transition-smooth);
    outline: none;
}

input:focus, textarea:focus, select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

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

/* Segmented Control for Radio Buttons */
.segmented-control {
    display: flex;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 0.25rem;
    gap: 0.25rem;
}

.segmented-control input[type="radio"] {
    display: none;
}

.segment-label {
    flex: 1;
    text-align: center;
    padding: 0.45rem 1rem;
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: none;
    letter-spacing: normal;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
    margin: 0;
}

.segmented-control input[type="radio"]:checked + .segment-label {
    background-color: var(--primary-color);
    color: #fff;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

/* Input Icon Wrapper */
.input-with-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon-left {
    position: absolute;
    left: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
    pointer-events: none;
}

.input-with-icon input {
    padding-left: 1.75rem;
}

.custom-multi-select {
    height: 90px;
}

/* Tables styling (Categories Index) */
table {
    width: 100%;
    border-collapse: collapse;
}

tr {
    border-bottom: 1px solid var(--border-color);
}

tr:last-child {
    border-bottom: none;
}

th, td {
    padding: 1rem;
    text-align: left;
}

th {
    font-weight: 600;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Mobile Bottom Navigation Layout */
.bottom-nav {
    display: none; /* Hidden on desktop */
}

/* Flash Alerts Alert layout */
.alert-container {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.alert {
    padding: 0.85rem 1.25rem;
    border-radius: var(--border-radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid transparent;
}

.alert-error {
    background-color: var(--error-glow);
    border-color: rgba(244, 63, 94, 0.2);
    color: #fda4af;
}

.alert-success {
    background-color: var(--secondary-glow);
    border-color: rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
}

/* Responsiveness Media queries */
@media (max-width: 768px) {
    .top-nav {
        padding: 0.85rem 1rem;
    }
    
    .top-nav .nav-links {
        display: none; /* Hide standard desktop links */
    }
    
    .mobile-user-header {
        display: block; /* Show user picture in top nav corner */
    }
    
    /* Display Bottom Nav Bar on Mobile */
    .bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background-color: rgba(21, 29, 48, 0.95);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-top: 1px solid var(--border-color);
        justify-content: space-around;
        align-items: center;
        padding: 0.5rem 0;
        z-index: 100;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.25);
    }
    
    .bottom-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.25rem;
        color: var(--text-secondary);
        font-size: 0.7rem;
        font-weight: 600;
        flex: 1;
        transition: var(--transition-smooth);
        text-decoration: none;
    }
    
    .bottom-nav-item .nav-icon {
        width: 22px;
        height: 22px;
        fill: currentColor;
    }
    
    .bottom-nav-item.active {
        color: var(--primary-color);
    }
    
    .dashboard-header {
        margin-bottom: 1.5rem;
    }
    
    .dashboard-title-area h1 {
        font-size: 1.75rem;
    }
    
    .header-actions {
        width: 100%;
    }
    
    .header-actions button {
        flex: 1;
    }
    
    .card {
        padding: 1.25rem;
    }
    
    .balance-value {
        font-size: 2.25rem;
    }
    
    .movement-description {
        max-width: 120px;
    }
    
    .movement-actions-group {
        gap: 0.5rem;
    }
    
    .item-actions {
        opacity: 1; /* Always visible on touch screens */
    }
    
    .styled-dialog {
        padding: 1.25rem;
    }
}