/* Reset básico y variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    width: 100%;
    overflow-x: hidden;
}

:root {
    /* Colores */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #6b7280;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    
    /* Grises */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Texto */
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-muted: var(--gray-500);
    
    /* Fondos */
    --bg-primary: #ffffff;
    --bg-secondary: var(--gray-50);
    --bg-muted: var(--gray-100);
    
    /* Bordes */
    --border: var(--gray-200);
    --border-hover: var(--gray-300);
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Espaciado */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Radios */
    --radius-sm: 0.25rem;
    --radius: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Fuentes */
    --font-sm: 0.875rem;
    --font-base: 1rem;
    --font-lg: 1.125rem;
    --font-xl: 1.25rem;
    --font-2xl: 1.5rem;
    --font-3xl: 1.875rem;
}

/* Tipografía base */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: var(--font-base);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    width: 100%;
    overflow-x: hidden;
}

body.modal-open {
    overflow: hidden;
}

/* Layout principal */
.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    width: 100%;
    overflow-x: hidden;
}

/* Header */
.header {
    overflow: visible; /* allow dropdowns to overflow the header container */
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    position: relative; /* create positioning context for absolute children */
    z-index: 50; /* keep header above baseline content but below dropdown which has very high z-index */
}

.header-left {
    display: flex;
    flex-direction: column;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    gap: var(--spacing-xs);
}

.header h1 {
    font-size: var(--font-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex: 1; /* occupy center space between title (left) and avatar (right) */
    justify-content: flex-start; /* align theme + new-trip to the left */
}

/* Ensure auth-area components keep order: theme, auth, new-trip */
.auth-area { display: inline-flex; align-items: center; gap: 0.5rem; order: 3; margin-left: auto; }
.theme-toggle { order: 1; }
/* Only set ordering for the header's new-trip button. Removing the global ".btn-primary" order
    prevents buttons in other flex containers (like modal-footers) from being reordered. */
#new-trip-btn { order: 2; }

/* Make sure buttons shrink on small screens */
.header-actions .btn { flex-shrink: 0; }

/* Mobile header: stack title and avatar on top, actions below to avoid overflow */
@media (max-width: 600px) {
    .header {
        padding: 0.5rem 0.75rem;
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
    }
    .header-left {
        display: flex;
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 0.5rem;
        width: 100%;
    }
    .header-left h1 { font-size: var(--font-lg); }
    .header-actions {
        display: flex;
        width: 100%;
        gap: 0.5rem;
        align-items: center;
        justify-content: flex-start;
        flex-wrap: wrap;
    }
    /* reduce padding on controls to keep them inside */
    .theme-toggle { padding: 0.25rem 0.5rem; }

    /* Compact paddings for buttons on tiny screens to avoid overflow */
    .header-actions .btn,
    .header-actions button {
        padding: 6px 8px;
        font-size: 0.9rem;
    }
}

/* Auth area: make login button compact on small screens */
.auth-area { display: inline-flex; align-items: center; gap: 0.5rem; }
.btn-outline { 
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border); 
    color: var(--text-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    transition: all 0.2s ease;
}
.btn-outline:hover {
    background: rgba(255, 255, 255, 1);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* User avatar on left */
.user-left { display: inline-flex; align-items: center; gap: 0.5rem; position: relative; }
.user-left-photo { 
    width: 36px; 
    height: 36px; 
    border-radius: 100%; 
    display: block;
    object-fit: cover;
}
.user-menu-btn { 
    background: none; 
    border: none; 
    padding: 0; 
    cursor: pointer; 
    border-radius: 50%; 
    width: 36px; 
    height: 36px; 
    display: flex; 
    align-items: center; 
    justify-content: center;
    overflow: hidden;
    transition: transform 0.2s;
    /* Borde consistente para todos los avatares */
    border: 2px solid rgba(0, 0, 0, 0.1);
}
.user-menu-btn:hover {
    transform: scale(1.05);
    border-color: var(--primary, #2563eb);
}
.user-menu-btn img {
    object-fit: cover;
}
/* SVG dentro del botón de avatar */
.user-menu-btn svg {
    flex-shrink: 0;
}

/* Dropdown menu */
.user-menu { position: absolute; top: calc(100% + 8px); right: 0; left: auto; background: var(--bg-primary); border: 1px solid var(--border); box-shadow: var(--shadow); border-radius: var(--radius); min-width: 160px; z-index: 99999; display: flex; flex-direction: column; }
.user-menu.hidden { display: none; }
/* Ensure both <a> and <button> variants look identical */
.user-menu-item {
    display: block; /* full width clickable area */
    padding: 10px 12px;
    text-align: left;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    text-decoration: none;
    width: 100%;
    font: inherit; /* use parent font settings so sizes match */
    line-height: 1.4;
    -webkit-appearance: none;
    appearance: none;
}
.user-menu-item:hover { background: var(--bg-muted); }

/* Make sure <a> and <button> variants are identical across mobile browsers */
.user-menu a.user-menu-item,
.user-menu button.user-menu-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 10px 12px;
    font-size: var(--font-base);
    line-height: 1.2;
    color: var(--text-primary);
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
    box-sizing: border-box;
    -webkit-appearance: none;
    appearance: none;
}

.user-menu button.user-menu-item { /* ensure native button styles are reset on iOS/Android */
    background: transparent;
    border: none;
    padding: 10px 12px;
}

/* Accessible focus style shared by both */
.user-menu a.user-menu-item:focus-visible,
.user-menu button.user-menu-item:focus-visible {
    outline: 2px solid rgba(37,99,235,0.15);
    outline-offset: 2px;
    background: var(--bg-muted);
}

/* When not logged in, show login button and hide user-info in header-actions (handled via JS classes) */
.user-info.hidden { display: none; }

/* Utility hidden class used by JS to toggle visibility */
.hidden { display: none !important; }

/* Ensure header elements don't overflow on mobile */
@media (max-width: 420px) {
    .switch { width: 48px; height: 28px; }
    .slider::before { width: 22px; height: 22px; left: 3px; }
    .theme-toggle-text { display: none; }
    .btn { padding: 6px 10px; font-size: 0.9rem; }
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius);
    background: var(--bg-primary);
    border: 1px solid transparent;
}

.theme-toggle:hover {
    border-color: var(--border);
}

.theme-toggle-text {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.switch {
    position: relative;
    display: inline-flex;
    align-items: center;
    width: 60px;
    height: 32px;
    cursor: pointer;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.slider {
    position: absolute;
    inset: 0;
    background: var(--bg-muted);
    border: 1px solid var(--border);
    border-radius: 999px;
    transition: background 0.3s ease, border-color 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.slider::before {
    content: '';
    position: absolute;
    width: 26px;
    height: 26px;
    top: 50%;
    left: 3px;
    transform: translate(0, -50%);
    border-radius: 50%;
    background: var(--bg-primary);
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, background 0.3s ease;
}

.switch-icons {
    position: absolute;
    inset: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 8px;
    font-size: 0.85rem;
    pointer-events: none;
    color: var(--text-secondary);
}

.switch input:focus-visible + .slider {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.switch input:checked + .slider {
    background: var(--primary);
    border-color: var(--primary);
}

.switch input:checked + .slider::before {
    transform: translate(28px, -50%);
    background: #fff;
}

.switch input:checked ~ .switch-icons .icon-sun {
    opacity: 0.4;
}

.switch input:not(:checked) ~ .switch-icons .icon-moon {
    opacity: 0.4;
}

/* Main content */
.main {
    flex: 1;
    padding: var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Contenedores */
.container {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

/* Selector de viaje */
.trip-selector {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
}

.trip-selector .select {
    flex: 1;
    min-width: 200px;
}

/* Información del viaje */
.trip-info {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
}

.trip-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.trip-info h2 {
    font-size: var(--font-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.trip-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-3xl);
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.stat-label {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: var(--spacing-xs);
}

/* Categorías */
.categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.category {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-primary);
}

.category-header {
    background: var(--bg-muted);
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.category-title {
    font-weight: 600;
    color: var(--text-primary);
}

.category-total {
    font-weight: 700;
    color: var(--primary);
}

.category-content {
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.category.active .category-content {
    max-height: 1000px;
    padding: var(--spacing-md);
}

.expense-item {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: background-color 0.2s;
}

.expense-item:hover {
    background: var(--bg-secondary);
}

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

.expense-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.expense-name {
    font-weight: 600;
    color: var(--text-primary);
}

.expense-amount {
    font-weight: 700;
    color: var(--primary);
}

/* Forzar truncamiento consistente en nombres largos dentro de la línea de gasto */
.expense-header {
    /* keep flex but allow children to shrink properly */
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.expense-name {
    flex: 1 1 0; /* ocupar el espacio disponible pero poder encoger */
    min-width: 0; /* importante para que el elemento pueda reducirse en flex containers */
    white-space: nowrap; /* mantener en una sola línea */
    overflow: hidden;
    text-overflow: ellipsis; /* truncar con puntos suspensivos */
}

.expense-amount {
    flex: 0 0 auto; /* no crecer ni encoger */
    margin-left: var(--spacing-md);
    white-space: nowrap;
}

/* Asegurar que títulos de categoría largos también se truncuen de forma consistente */
.category-title {
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: inline-block;
    max-width: 100%;
}

.expense-meta {
    font-size: var(--font-sm);
    color: var(--text-secondary);
}

.add-expense {
    padding: var(--spacing-lg);
    text-align: center;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius);
    font-size: var(--font-base);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
    line-height: 1.5;
    white-space: nowrap;
}

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

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-muted);
    border-color: var(--border-hover);
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-small {
    font-size: var(--font-sm);
}

.trip-actions {
    margin-top: var(--spacing-xl);
    display: flex;
    justify-content: center;
}

.trip-actions .btn {
    margin-top: 0;
}

/* Formularios */
.form {
    display: grid;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    flex: 1 1 auto;
}

.field {
    display: grid;
    gap: var(--spacing-xs);
}

.field label {
    font-weight: 500;
    color: var(--text-primary);
    font-size: var(--font-sm);
}

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

.select,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="datetime-local"],
input[type="file"],
textarea {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: var(--font-base);
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
    width: 100%;
    max-width: 100%;
}

.select:focus,
input:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    align-items: center;
    width: 100%;
}

.checkbox-item {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius);
    border: 1px solid transparent;
    color: var(--text-secondary);
    font-size: var(--font-sm);
    font-weight: 500;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.checkbox-item:hover {
    border-color: var(--border);
    background: var(--bg-muted);
}

.checkbox-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--primary);
}

/* Modales */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgb(0 0 0 / 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    width: min(100%, 500px);
    max-width: min(500px, calc(100vw - (2 * var(--spacing-lg))));
    max-height: min(90vh, calc(100vh - (2 * var(--spacing-lg))));
    overflow-y: auto;
    overflow-x: hidden; /* evitar scroll horizontal causado por nombres largos */
    box-shadow: var(--shadow-xl);
}

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

.modal-header h3 {
    font-size: var(--font-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-xl);
    cursor: pointer;
    color: var(--text-secondary);
    padding: var(--spacing-xs);
    line-height: 1;
    border-radius: var(--radius);
    transition: all 0.2s;
}

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

.modal-footer {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
}

/* Ensure modal footer preserves DOM order and doesn't get affected by global ordering rules. */
.modal-footer > * { order: 0; }

/* Imagen actual en modal */
.current-image {
    display: grid;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-muted);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.current-image img {
    max-width: 200px;
    height: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

/* Previsualizaciones de archivos (imágenes y PDFs) dentro del modal de gasto */
.file-previews {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.file-preview-item {
    display: grid;
    grid-template-columns: 64px 1fr auto; /* thumb | info (flexible) | acciones */
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-muted);
    min-width: 0; /* asegurar que el contenedor no fuerza a los hijos a crecer */
    overflow: visible; /* permitir que el contenido y el botón permanezcan visibles */
}

.preview-image {
    width: 64px;
    height: 64px;
    object-fit: cover;
    display: block;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.preview-pdf {
    display: inline-block;
    padding: 6px 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.9rem;
}

/* Hacer que los links de PDFs en la lista se muestren en una sola línea y se trunquen con ...
   Esto hace consistente el comportamiento con .file-name y evita que algunos nombres
   largos rompan el layout al ocupar varias líneas. */
.preview-pdf {
    max-width: 100%;
    display: inline-block;
    white-space: nowrap; /* una sola línea */
    overflow: hidden;
    text-overflow: ellipsis; /* truncar con puntos suspensivos */
    vertical-align: middle;
}

/* Asegurar que la columna flexible permita que el contenido se reduzca */
.file-info {
    min-width: 0; /* ya estaba pero reforzamos aquí por seguridad */
}

.file-delete-btn {
    margin-top: 0.25rem;
}

/* Nuevos estilos para lista uniforme */
.file-thumb {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 64px;
}

.file-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden; /* importante: impedir que el contenido interno haga crecer la columna */
}

.file-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
    white-space: nowrap; /* mantener en una línea */
    overflow: hidden;
    text-overflow: ellipsis; /* truncar con puntos suspensivos */
    display: block;
    max-width: 100%;
}

.file-name a {
    display: inline-block;
    max-width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.file-icon {
    font-size: 24px;
}

.file-preview-item .btn {
    margin-left: 0.5rem;
    flex: 0 0 auto;
}

/* Asegurar que el botón eliminar quede pegado al extremo derecho y no provoque overflow */
.file-delete-btn {
    /* en layout grid la columna de acciones es auto; no forzamos margin-left:auto */
    margin-left: 0.5rem;
    flex: 0 0 auto;
}

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

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

/* Estilos para el modal de ayuda */
#help-modal pre {
    background: var(--bg-muted);
    padding: var(--spacing-md);
    border-radius: var(--radius);
    font-size: var(--font-sm);
    overflow-x: auto;
    border: 1px solid var(--border);
}

#help-modal h4 {
    color: var(--primary);
    margin: var(--spacing-lg) 0 var(--spacing-sm) 0;
    font-size: var(--font-lg);
}

#help-modal ul {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
}

#help-modal li {
    margin-bottom: var(--spacing-xs);
}

#help-modal a {
    color: var(--primary);
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: stretch;
    }
    
    .main {
        padding: var(--spacing-md);
    }
    
    .container {
        padding: var(--spacing-md);
    }
    
    .trip-info {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: stretch;
    }
    
    .trip-stats {
        justify-content: space-around;
    }
    
    .trip-selector {
        flex-direction: column;
        align-items: stretch;
    }
    
    .field-row {
        grid-template-columns: 1fr;
    }
    
    .categories {
        grid-template-columns: 1fr;
    }
    
    .modal {
        padding: 0;
        align-items: flex-start;
        justify-content: center;
    }
    
    .modal-content {
        width: 100%;
        max-width: 100%;
        min-height: 100vh;
        min-height: 100dvh;
        max-height: 100vh;
        max-height: 100dvh;
        border-radius: 0;
        box-shadow: none;
    }

    .modal-header {
        padding: calc(var(--spacing-md) + env(safe-area-inset-top, 0px)) var(--spacing-md) var(--spacing-md);
        border-radius: 0;
    }

    .modal-footer {
        padding: var(--spacing-md) var(--spacing-md) calc(var(--spacing-md) + env(safe-area-inset-bottom, 0px));
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: stretch;
        background: var(--bg-primary);
        border-radius: 0;
        padding-bottom: 6rem;
    }

    .modal-footer .btn {
        width: 100%;
    }

    .form {
        padding: var(--spacing-md);
        overflow-y: auto;
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: var(--font-xl);
    }
    
    .stat-number {
        font-size: var(--font-2xl);
    }
    
    .modal-content {
        min-height: 100vh;
        min-height: 100dvh;
        max-height: 100vh;
        max-height: 100dvh;
    }
}



.category-header .category-total span {
    font-size: 0.85rem;
}

/* Ocultar visualmente las barras de desplazamiento en móviles, pero mantener el scroll táctil */
@media (max-width: 768px) {
    html, body, .main, .modal, .modal-content, .container, .categories, .category-content, .form, .file-previews {
        -ms-overflow-style: none; /* IE and Edge */
        scrollbar-width: none; /* Firefox */
    }

    /* Webkit browsers (Chrome, Safari, Opera) */
    html::-webkit-scrollbar,
    body::-webkit-scrollbar,
    .main::-webkit-scrollbar,
    .modal::-webkit-scrollbar,
    .modal-content::-webkit-scrollbar,
    .container::-webkit-scrollbar,
    .category-content::-webkit-scrollbar,
    .file-previews::-webkit-scrollbar {
        width: 0px;
        height: 0px;
    }
}

/* Arreglar ancho de inputs de fecha/hora en móvil para que no queden más anchos */
@media (max-width: 768px) {
    input[type="datetime-local"],
    input[type="date"],
    input[type="time"] {
        display: block;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box;
        -webkit-appearance: textfield; /* minimizar variaciones entre navegadores móviles */
        appearance: textfield;
        font-size: var(--font-base);
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

.modal-saving-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;

    background: rgba(0,0,0,0.45);
    display: flex;
    align-items: center;
    justify-content: center;

    z-index: 99999;
}

.modal-saving-spinner {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 4px solid rgba(255,255,255,0.25);
    border-top-color: rgba(255,255,255,0.95);
    animation: spin 1s linear infinite;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

@keyframes spin {
    to { transform: rotate(360deg); }
}


/* Reglas específicas para iOS Safari (evitar que inputs de fecha/hora sobresalgan) */
@supports (-webkit-overflow-scrolling: touch) {
    input[type="datetime-local"],
    input[type="date"],
    input[type="time"] {
        -webkit-appearance: none; /* quitar apariencia nativa que puede forzar tamaño */
        appearance: none;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-base);
        line-height: 1.4;
        min-width: 0;
    }

    /* Asegurar que las partes internas del control se ajusten y no expandan el input */
    input[type="datetime-local"]::-webkit-datetime-edit,
    input[type="date"]::-webkit-datetime-edit,
    input[type="time"]::-webkit-datetime-edit,
    input[type="datetime-local"]::-webkit-datetime-edit-field,
    input[type="date"]::-webkit-datetime-edit-field,
    input[type="time"]::-webkit-datetime-edit-field {
        display: block;
        box-sizing: border-box;
        width: 100%;
        padding: 0;
        margin: 0;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
}

/* Button icon helper: keeps small icons aligned to the left of the label */
.btn .btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    margin-right: 8px;
    flex: 0 0 auto;
}

/* Ensure SVGs inside .btn-icon don't overflow */
.btn .btn-icon svg {
    display: block;
    width: 100%;
    height: 100%;
}

/* === Currency Conversion Styles === */
.currency-info {
    background: var(--bg-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.conversion-display {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: var(--font-sm);
}

.conversion-display .highlight {
    color: var(--primary);
    font-weight: 600;
}

.currency-select-group {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-end;
}

.currency-field {
    flex: 1;
}

.currency-swap-btn {
    padding: var(--spacing-xs);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    height: 38px;
    width: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.currency-swap-btn:hover {
    background: var(--bg-muted);
    border-color: var(--border-hover);
}

/* === Multi-currency expense display === */
.expense-amount-multi {
    text-align: right;
}

.expense-amount-multi .amount-original {
    font-weight: 600;
    color: var(--text-primary);
}

.expense-amount-multi .amount-converted {
    font-size: 0.85em;
    color: var(--text-secondary);
    margin-top: 2px;
}

.expense-amount-multi small {
    font-weight: 400;
    opacity: 0.8;
}

/* === Trip Currency Configuration === */
.trip-currency-config {
    background: var(--bg-muted);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    margin: 16px 0;
}

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

.currency-config-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.currency-config-panel {
    margin-top: 16px;
}

.currency-config-panel.hidden {
    display: none;
}

.currency-config-grid {
    display: grid;
    gap: 16px;
    margin-bottom: 16px;
}

@media (min-width: 768px) {
    .currency-config-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.currency-config-item label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.currency-config-item small {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.currency-config-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.currency-config-status {
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 6px;
    border: 1px solid var(--border);
}

.currency-config-status p {
    margin: 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.currency-config-status.success {
    background: #dcfce7;
    border-color: #bbf7d0;
    color: #166534;
}

.currency-config-status.success p {
    color: #166534;
}

.currency-config-status.info {
    background: #dbeafe;
    border-color: #bfdbfe;
    color: #1e40af;
}

.currency-config-status.info p {
    color: #1e40af;
}

/* ========================================
   Bottom Navigation - Mobile Only
   ======================================== */

.bottom-nav {
    display: none; /* Hidden on desktop */
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 4px 0 16px 0;
    /* Agregar padding adicional para safe-area en iPhones */
    padding-bottom: max(16px, env(safe-area-inset-bottom, 16px));
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8px 12px;
    text-decoration: none;
    color: var(--text-muted);
    transition: all 0.25s ease;
    flex: 1;
    min-height: 56px;
    position: relative;
    border-radius: 8px;
    margin: 0 4px;
}

.bottom-nav-item:hover {
    color: var(--primary);
    transform: translateY(-1px);
}

.bottom-nav-item.active {
    color: var(--primary);
}

.bottom-nav-item.active::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background-color: var(--primary);
    border-radius: 0 0 6px 6px;
}

.bottom-nav-item.active .bottom-nav-icon {
    transform: scale(1.1);
}

.bottom-nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 4px;
    line-height: 1;
    transition: transform 0.2s ease;
}

.bottom-nav-icon svg {
    width: 20px;
    height: 20px;
}

.bottom-nav-label {
    font-size: 11px;
    font-weight: 600;
    line-height: 1;
    letter-spacing: 0.5px;
}

/* ========================================
   Mobile New Trip Button
   ======================================== */

.mobile-new-trip-wrapper {
    display: none; /* Hidden on desktop */
}

.mobile-new-trip-btn {
    width: 100%;
    font-size: var(--font-base);
    border-radius: var(--radius-lg);
}

/* ========================================
   Local Mode Banner
   ======================================== */

.local-mode-banner {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    color: white;
    border-radius: var(--radius);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.local-mode-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    position: relative;
}

.local-mode-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.local-mode-text {
    flex: 1;
}

.local-mode-text strong {
    display: block;
    margin-bottom: 4px;
    font-size: 16px;
}

.local-mode-text p {
    margin: 0 0 4px 0;
    opacity: 0.9;
}

.local-mode-text small {
    opacity: 0.8;
    font-size: 13px;
}

.local-mode-close {
    background: none;
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 50%;
    opacity: 0.8;
    transition: opacity 0.2s, background-color 0.2s;
}

.local-mode-close:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.1);
}

/* ========================================
   Mobile Top Bar - Simple conditional display
   ======================================== */

.mobile-top-bar {
    display: none; /* Hidden on desktop */
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-light);
    background: var(--bg-glass);
    backdrop-filter: var(--blur-sm);
}

.mobile-user-section,
.mobile-login-section {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding-right: 2rem;
    padding-top: 2rem;

}

.mobile-user-btn {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-soft);
}

.mobile-user-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

/* Removed specific mobile login button styles - now uses same as desktop */

/* Legacy mobile elements - keeping for backwards compatibility */
.mobile-user-menu-btn {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    border-radius: 50%;
    width: 44px; /* Slightly larger for better touch target */
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: transform 0.2s;
    border: 2px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15); /* Add shadow for better visibility */
}

.mobile-user-menu-btn:hover {
    transform: scale(1.05);
    border-color: var(--primary, #2563eb);
}

.mobile-user-photo {
    width: 40px;
    height: 40px;
    border-radius: 100%;
    display: block;
    object-fit: cover;
}

.mobile-user-menu-btn img {
    object-fit: cover;
}

.mobile-user-menu-btn svg {
    flex-shrink: 0;
}

.mobile-user-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    border-radius: var(--radius);
    min-width: 160px;
    z-index: 99999;
    display: flex;
    flex-direction: column;
}

.mobile-user-menu.hidden {
    display: none;
}

.mobile-user-menu-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 12px 16px; /* Slightly larger padding for mobile */
    font-size: var(--font-base);
    line-height: 1.2;
    color: var(--text-primary);
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
    box-sizing: border-box;
    text-decoration: none;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

.mobile-user-menu-item:hover {
    background: var(--bg-muted);
}

.mobile-user-menu-item:focus-visible {
    outline: 2px solid rgba(37,99,235,0.15);
    outline-offset: 2px;
    background: var(--bg-muted);
}

/* ========================================
   Mobile Login Button
   ======================================== */

.mobile-login-btn {
    display: none; /* Hidden on desktop */
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9998; /* Same level as mobile avatar */
}

/* Legacy mobile login button styles removed */

/* Los estilos mejorados ahora se aplican globalmente a todos los botones outline */

/* ========================================
   Mobile-specific styles
   ======================================== */

@media (max-width: 767px) {
    /* Show bottom navigation on mobile */
    .bottom-nav {
        display: flex;
    }
    
    /* Hide header on mobile */
    .header {
        display: none;
    }
    
    /* Show mobile top bar */
    .mobile-top-bar {
        display: block !important;
    }
    
    /* Show mobile new trip button */
    .mobile-new-trip-wrapper {
        display: block;
    }
    
    /* Hide old mobile user avatar (backwards compatibility) */
    .mobile-user-avatar {
        display: none !important;
    }
    
    /* Show mobile login button when needed */
    .mobile-login-btn {
        display: block;
    }
    
    /* Adjust main content to account for bottom navigation and top avatar */
    .main {
        padding-bottom: 90px; /* Space for bottom nav with extra padding */
    }
    
    /* Adjust app container for mobile */
    .app {
        min-height: 100vh;
    }
    
    /* Settings page adjustments for mobile */
    .settings-container {
        padding-bottom: 90px; /* Space for bottom nav with extra padding */
    }
}

/* ========================================
   PWA Standalone mode adjustments
   ======================================== */

/* When running in PWA standalone mode */
@media (display-mode: standalone) {
    @media (max-width: 767px) {
        /* Ensure bottom nav is visible above system UI */
        .bottom-nav {
            z-index: 9999;
            /* Add safe area padding for devices with home indicators */
            padding-bottom: max(8px, env(safe-area-inset-bottom));
        }
        
        /* Adjust main content for safe area */
        .main {
            padding-bottom: calc(90px + env(safe-area-inset-bottom));
        }
        
        .settings-container {
            padding-bottom: calc(90px + env(safe-area-inset-bottom));
            padding-top: calc(80px + env(safe-area-inset-top));
        }
        
        /* Ensure content doesn't go under system bars */
        body {
            padding-top: env(safe-area-inset-top);
        }
    }
}

/* ========================================
   iPhone specific adjustments
   ======================================== */

/* Ajustes específicos para iPhones y dispositivos iOS */
@supports (-webkit-touch-callout: none) {
    @media (max-width: 767px) {
        .bottom-nav {
            /* Espacio adicional para iPhones */
            padding-bottom: max(20px, env(safe-area-inset-bottom, 20px));
        }
        
        .main {
            padding-bottom: 100px; /* Más espacio para iPhone */
        }
        
        .settings-container {
            padding-bottom: 100px; /* Más espacio para iPhone */
            padding-top: 80px; /* Espacio para avatar móvil */
        }
    }
}

/* ========================================
   Tablet adjustments (iPad size)
   ======================================== */

@media (min-width: 768px) and (max-width: 1024px) {
    /* On tablets, keep desktop navigation but make it more touch-friendly */
    .header {
        padding: var(--spacing-lg);
    }
    
    .header-actions .btn {
        padding: 12px 16px;
        font-size: 16px;
    }
    
    /* Ensure bottom nav is hidden on tablets */
    .bottom-nav {
        display: none;
    }
}