/* ====================================
   EXPENSE TRACKER - MOBILE-FIRST CSS
   ==================================== */

/* === CSS RESET & BASE === */
*, *::before, *::after {
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary: #2196F3;
    --primary-dark: #0b7dda;
    --secondary: #4CAF50;
    --secondary-dark: #45a049;
    --danger: #f44336;
    --danger-dark: #da190b;
    --warning: #ff9800;
    --warning-dark: #f57c00;

    /* Grays */
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #eeeeee;
    --gray-300: #e0e0e0;
    --gray-400: #bdbdbd;
    --gray-500: #9e9e9e;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;

    /* Text colors */
    --text-primary: #333;
    --text-secondary: #666;
    --text-muted: #999;

    /* Background colors */
    --bg-primary: #ffffff;
    --bg-secondary: var(--gray-100);
    --bg-success: #e8f5e9;
    --bg-info: #e3f2fd;
    --bg-warning: #fff3e0;
    --bg-danger: #ffebee;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 50%;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-xl: 0 10px 40px rgba(0,0,0,0.2);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--spacing-md) 0;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

@media (min-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
}

/* === LAYOUT === */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: var(--spacing-xl);
    }
}

/* === HEADER & NAVIGATION === */
.header {
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
    margin-bottom: var(--spacing-lg);
}

/* Mobile: Title bar with profile picture on right */
.header-content {
    padding: var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: var(--spacing-md);
    align-items: center;
}

.header-branding {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    grid-column: 1;
    grid-row: 1;
}

.header-logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.header h1 {
    margin: 0;
    font-size: 1.5rem;
}

/* Profile menu stays in top-right on mobile */
.user-menu {
    grid-column: 2;
    grid-row: 1;
    margin-left: 0; /* Override the default margin */
}

/* Nav links span full width below title on mobile */
.header-actions {
    grid-column: 1 / -1;
    grid-row: 2;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* Tablet and desktop: Everything in one row */
@media (min-width: 768px) {
    .header-content {
        display: flex;
        flex-direction: row;
        align-items: center;
        padding: var(--spacing-md) var(--spacing-xl);
    }

    .header-branding {
        margin-right: auto; /* Push everything else to the right */
    }

    .header-logo {
        width: 56px;
        height: 56px;
    }

    .header h1 {
        font-size: 2rem;
    }

    .header-actions {
        flex-direction: row;
        gap: var(--spacing-md);
        align-items: center;
        order: 2; /* Nav buttons come second */
    }

    .user-menu {
        margin-left: var(--spacing-md);
        order: 3; /* Profile comes last (far right) */
    }
}

.nav-links {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.nav-link {
    display: inline-block;
    background-color: var(--primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: background-color var(--transition-fast);
    text-align: center;
    white-space: nowrap;
}

.nav-link:hover {
    background-color: var(--primary-dark);
}

.nav-link.danger {
    background-color: var(--danger);
}

.nav-link.danger:hover {
    background-color: var(--danger-dark);
}

/* === USER MENU === */
.user-menu {
    position: relative;
    /* margin-left set by grid/flex layout above */
}

.user-menu-trigger {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.user-menu-trigger:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.user-avatar,
.user-avatar-fallback {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.user-avatar-fallback {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-weight: 600;
    font-size: 1.125rem;
}

.user-menu-dropdown {
    position: absolute;
    top: calc(100% + var(--spacing-sm));
    right: 0;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    min-width: 240px;
    max-width: calc(100vw - var(--spacing-md) * 2); /* Don't exceed viewport */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--transition-fast),
                transform var(--transition-fast),
                visibility var(--transition-fast);
    z-index: 1000;
}

/* On very small screens, align dropdown to right edge of viewport */
@media (max-width: 374px) {
    .user-menu-dropdown {
        right: calc(-1 * var(--spacing-md));
    }
}

.user-menu-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-menu-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
}

.user-menu-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.9375rem;
}

.user-menu-email {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-menu-divider {
    height: 1px;
    background-color: var(--gray-200);
}

.user-menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: background-color var(--transition-fast);
}

.user-menu-item:hover {
    background-color: var(--gray-100);
}

.user-menu-icon {
    width: 18px;
    height: 18px;
    color: var(--text-secondary);
}

/* Tablet and up */
@media (min-width: 768px) {
    .user-avatar,
    .user-avatar-fallback {
        width: 44px;
        height: 44px;
    }

    .user-avatar-fallback {
        font-size: 1.25rem;
    }
}

/* === BUTTONS === */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    text-align: center;
    white-space: nowrap;
}

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

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

.btn-success {
    background-color: var(--secondary);
    color: white;
}

.btn-success:hover {
    background-color: var(--secondary-dark);
}

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

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

.btn-secondary {
    background-color: var(--gray-200);
    color: var(--text-primary);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover {
    background-color: var(--gray-300);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8125rem;
}

.btn-icon {
    width: 2rem;
    height: 2rem;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
}

/* === CARDS === */
.card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-md);
}

@media (min-width: 768px) {
    .card {
        padding: var(--spacing-lg);
    }
}

.card-header {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--primary);
}

.card-title {
    margin: 0;
    font-size: 1.25rem;
    color: var(--text-primary);
}

/* === FORMS === */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.form-label.required::after {
    content: " *";
    color: var(--danger);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-family: inherit;
    transition: border-color var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-textarea {
    min-height: 4rem;
    resize: vertical;
}

.form-select {
    font-family: 'Courier New', monospace;
    background-color: white;
}

.form-error {
    color: var(--danger);
    font-size: 0.75rem;
    margin-top: var(--spacing-xs);
}

.form-success {
    color: var(--secondary);
    font-size: 0.75rem;
    margin-top: var(--spacing-xs);
}

/* === FILTER SECTION === */
.filter-section {
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.filter-form {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 640px) {
    .filter-form {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .filter-form {
        grid-template-columns: repeat(3, 1fr);
    }
}

.filter-actions {
    display: flex;
    gap: var(--spacing-sm);
    grid-column: 1 / -1;
}

@media (min-width: 640px) {
    .filter-actions {
        grid-column: 1 / -1;
    }
}

/* === TRANSACTION CARDS === */
.transaction-card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-md);
    border-left: 4px solid transparent;
}

@media (min-width: 768px) {
    .transaction-card {
        padding: var(--spacing-xl);
    }
}

.transaction-card.uncategorized {
    border-left-color: var(--danger);
    background-color: var(--bg-danger);
}

.transaction-card.similarity-source {
    border-left-color: var(--warning);
    background-color: var(--bg-warning);
}

.transaction-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

@media (min-width: 640px) {
    .transaction-info {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md) var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .transaction-info {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md) var(--spacing-xl);
    }
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.info-label {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    background-color: var(--gray-100);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    width: fit-content;
}

.info-value {
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-weight: 500;
    padding-left: var(--spacing-sm);
    line-height: 1.4;
    word-break: break-word;
}

/* Desktop: More compact layout with labels inline */
@media (min-width: 1024px) {
    .info-item {
        display: grid;
        grid-template-columns: auto 1fr;
        gap: var(--spacing-sm);
        align-items: start;
    }

    .info-label {
        margin-top: 2px; /* Align with text baseline */
    }

    .info-value {
        padding-left: 0;
    }
}

/* === BADGES === */
.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-category {
    background-color: var(--bg-info);
    color: #1976d2;
}

.badge-uncategorized {
    background-color: var(--bg-danger);
    color: #c62828;
    border: 1px solid var(--danger);
}

.badge-source {
    background-color: var(--gray-200);
    color: var(--text-primary);
}

.badge-source.similarity {
    background-color: var(--bg-warning);
    color: var(--warning-dark);
}

.badge-source.manual {
    background-color: var(--bg-success);
    color: #2e7d32;
}

.badge-source.regexp {
    background-color: var(--bg-info);
    color: #1565c0;
}

/* === MODALS === */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-md);
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--gray-300);
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
}

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

/* === FLASH MESSAGES === */
.flash-messages {
    margin-bottom: var(--spacing-lg);
}

.flash-message {
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    border-left: 4px solid;
}

.flash-success {
    background-color: var(--bg-success);
    border-left-color: var(--secondary);
    color: #2e7d32;
}

.flash-error {
    background-color: var(--bg-danger);
    border-left-color: var(--danger);
    color: #c62828;
}

/* === INFO BOXES === */
.info-note {
    background-color: var(--bg-success);
    border-left: 4px solid var(--secondary);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.info-note p {
    margin: 0;
    color: #2e7d32;
}

/* === TABLES === */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

th, td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--gray-300);
}

th {
    background-color: var(--gray-100);
    font-weight: 600;
    color: var(--text-primary);
}

tr:hover {
    background-color: var(--gray-100);
}

tbody tr {
    cursor: pointer;
}

/* === CHARTS === */
.charts-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

@media (min-width: 1024px) {
    .charts-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

.chart-wrapper {
    position: relative;
    height: 300px;
}

@media (min-width: 768px) {
    .chart-wrapper {
        height: 400px;
    }
}

/* === UTILITIES === */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }

@media (min-width: 768px) {
    .d-md-block { display: block; }
    .d-md-flex { display: flex; }
}

.flex-column { flex-direction: column; }
.flex-row { flex-direction: row; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.full-width { width: 100%; }

@media (min-width: 1024px) {
    .grid-col-span-2 {
        grid-column: 1 / -1;
    }
}

/* === PENDING CHANGES BAR === */
.pending-changes-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--warning);
    color: white;
    padding: var(--spacing-md);
    text-align: center;
    box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.2);
    display: none;
    z-index: 999;
    transform: translateY(100%);
    transition: transform var(--transition-normal);
}

.pending-changes-bar.visible {
    display: block;
    transform: translateY(0);
}

.pending-changes-bar button {
    background-color: white;
    color: var(--warning);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    margin: 0 var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.875rem;
}

.pending-changes-bar button:hover {
    background-color: var(--gray-100);
}

.pending-changes-bar button.cancel-btn {
    background-color: transparent;
    color: white;
    border: 1px solid white;
}

.pending-changes-bar button.cancel-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* === LOGIN PAGE === */
.login-container {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-lg);
}

.login-card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    max-width: 400px;
    width: 100%;
    text-align: center;
}

.logo {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: 0.875rem;
}

/* === LOADING & EMPTY STATES === */
.loading {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
}

/* === ANIMATIONS === */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn var(--transition-normal);
}

/* === PRINT STYLES === */
@media print {
    .header,
    .nav-links,
    .filter-section,
    .btn,
    .pending-changes-bar {
        display: none !important;
    }

    body {
        background-color: white;
    }

    .card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
}