/**
 * SplitBill - Main Styles
 * Base styles, components, and layouts
 */

/* ===================
   CSS Reset / Normalize
   =================== */

*,
*::before,
*::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-secondary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
}

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

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

a:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

img, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

/* ===================
   Utility Classes
   =================== */

.hidden {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

.text-muted {
    color: var(--color-text-muted);
}

/* ===================
   Buttons
   =================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-medium);
    line-height: 1.5;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    user-select: none;
}

.btn:focus-visible {
    outline: none;
    box-shadow: var(--shadow-focus);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Button Variants */
.btn-primary {
    color: var(--color-primary-contrast);
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

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

.btn-secondary {
    color: var(--color-secondary-contrast);
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
}

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

.btn-outline {
    color: var(--color-primary);
    background-color: transparent;
    border-color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
    color: var(--color-primary-contrast);
    background-color: var(--color-primary);
}

.btn-danger {
    color: #ffffff;
    background-color: var(--color-danger);
    border-color: var(--color-danger);
}

.btn-danger:hover:not(:disabled) {
    background-color: var(--color-danger-dark);
    border-color: var(--color-danger-dark);
}

.btn-success {
    color: #ffffff;
    background-color: var(--color-success);
    border-color: var(--color-success);
}

.btn-success:hover:not(:disabled) {
    background-color: var(--color-success-dark);
    border-color: var(--color-success-dark);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-lg);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-icon {
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
}

.btn-icon:hover {
    color: var(--color-text-primary);
    background-color: var(--color-bg-tertiary);
}

.btn-link {
    color: var(--color-primary);
    background: none;
    border: none;
    padding: 0;
    font-weight: var(--font-weight-medium);
    text-decoration: underline;
    cursor: pointer;
}

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

/* ===================
   Form Elements
   =================== */

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="search"],
input[type="tel"],
input[type="url"],
select,
textarea {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-md);
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    background-clip: padding-box;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: var(--shadow-focus);
}

input::placeholder,
textarea::placeholder {
    color: var(--color-text-muted);
}

input:disabled,
select:disabled,
textarea:disabled {
    background-color: var(--color-bg-tertiary);
    opacity: 0.7;
    cursor: not-allowed;
}

input.error,
select.error,
textarea.error {
    border-color: var(--color-danger);
}

input.error:focus,
select.error:focus,
textarea.error:focus {
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.25);
}

textarea {
    min-height: 100px;
    resize: vertical;
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236c757d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-sm) center;
    padding-right: var(--spacing-xl);
}

.form-hint {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.form-error {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-danger);
}

.form-actions {
    margin-top: var(--spacing-lg);
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
}

.form-message:empty {
    display: none;
}

.form-message.success {
    color: var(--color-success-dark);
    background-color: var(--color-success-light);
}

.form-message.error {
    color: var(--color-danger-dark);
    background-color: var(--color-danger-light);
}

/* ===================
   Cards
   =================== */

.card {
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-bg-secondary);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin: 0;
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    background-color: var(--color-bg-secondary);
}

/* ===================
   Tables
   =================== */

.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

thead {
    background-color: var(--color-bg-secondary);
}

th {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
}

td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
    vertical-align: middle;
}

tbody tr:hover {
    background-color: var(--color-bg-secondary);
}

.table-responsive {
    border-radius: var(--radius-md);
    overflow: hidden;
}

/* ===================
   Auth Page Layout
   =================== */

.auth-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
}

.auth-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    max-width: 420px;
    margin: 0 auto;
    width: 100%;
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-logo {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.auth-tagline {
    font-size: var(--font-size-md);
    color: var(--color-text-secondary);
}

.auth-section {
    width: 100%;
    background-color: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.auth-title {
    font-size: var(--font-size-xl);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.auth-form {
    width: 100%;
}

.auth-switch {
    text-align: center;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.auth-switch .btn-link {
    margin-left: var(--spacing-xs);
}

.auth-footer {
    padding: var(--spacing-md);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.language-switch {
    margin-top: var(--spacing-sm);
}

.language-switch .separator {
    margin: 0 var(--spacing-xs);
    color: var(--color-text-muted);
}

/* ===================
   App Page Layout
   =================== */

.app-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding-bottom: var(--nav-height);
}

/* App Header */
.app-header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--spacing-md);
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.header-brand {
    display: flex;
    align-items: center;
}

.header-logo {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

.header-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
}

/* App Navigation */
.app-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    height: var(--nav-height);
    background-color: var(--color-bg-primary);
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.nav-list {
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.nav-item {
    flex: 1;
}

.nav-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.nav-icon {
    width: 24px;
    height: 24px;
}

.nav-label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

/* App Main Content */
.app-main {
    flex: 1;
    padding: var(--spacing-md);
    max-width: var(--container-max-width);
    margin: 0 auto;
    width: 100%;
}

/* Views */
.view {
    animation: fadeIn var(--transition-normal);
}

.view-header {
    margin-bottom: var(--spacing-lg);
}

.view-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
}

.view-content {
    background-color: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.placeholder-text {
    text-align: center;
    color: var(--color-text-muted);
    padding: var(--spacing-xl);
}

/* ===================
   Loading Overlay
   =================== */

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-modal);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.5);
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-bg-tertiary);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-text {
    margin-top: var(--spacing-md);
    color: var(--color-text-inverse);
    font-size: var(--font-size-md);
}

/* ===================
   Toast Notifications
   =================== */

.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 360px;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    pointer-events: auto;
    animation: slideIn var(--transition-normal);
}

.toast.success {
    border-left: 4px solid var(--color-success);
}

.toast.error {
    border-left: 4px solid var(--color-danger);
}

.toast.warning {
    border-left: 4px solid var(--color-warning);
}

.toast.info {
    border-left: 4px solid var(--color-info);
}

.toast-message {
    flex: 1;
    font-size: var(--font-size-sm);
}

.toast-close {
    padding: var(--spacing-xs);
    color: var(--color-text-muted);
    cursor: pointer;
}

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

/* ===================
   Animations
   =================== */

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

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

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

/* ===================
   Responsive Breakpoints
   =================== */

/* Tablet and up */
@media (min-width: 768px) {
    .app-page {
        padding-bottom: 0;
    }

    .app-nav {
        position: static;
        height: auto;
        border-top: none;
        border-bottom: 1px solid var(--color-border);
        box-shadow: none;
    }

    .nav-list {
        justify-content: flex-start;
        gap: var(--spacing-sm);
        padding: 0 var(--spacing-md);
    }

    .nav-item {
        flex: none;
    }

    .nav-link {
        flex-direction: row;
        gap: var(--spacing-sm);
        padding: var(--spacing-sm) var(--spacing-md);
        border-radius: var(--radius-md);
    }

    .nav-link:hover {
        background-color: var(--color-bg-secondary);
    }

    .nav-link.active {
        background-color: var(--color-bg-tertiary);
    }

    .nav-label {
        font-size: var(--font-size-sm);
    }

    .app-main {
        padding: var(--spacing-xl);
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .auth-container {
        max-width: 480px;
    }

    .auth-section {
        padding: var(--spacing-2xl);
    }

    .view-content {
        padding: var(--spacing-xl);
    }
}

/* ===================
   Icon Utility
   =================== */

.icon {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: -0.125em;
    fill: currentColor;
}

.icon-sm {
    width: 16px;
    height: 16px;
}

.icon-md {
    width: 24px;
    height: 24px;
}

.icon-lg {
    width: 32px;
    height: 32px;
}

/* ===================
   Upload Area
   =================== */

.upload-area {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    background-color: var(--color-bg-secondary);
}

.upload-area:hover {
    border-color: var(--color-primary);
    background-color: var(--color-bg-tertiary);
}

.upload-placeholder {
    color: var(--color-text-muted);
}

.upload-placeholder svg {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-muted);
}

.upload-preview {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius-md);
    object-fit: contain;
}

/* ===================
   Split Slider
   =================== */

.split-slider-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.split-slider {
    flex: 1;
    height: 8px;
    -webkit-appearance: none;
    appearance: none;
    background: linear-gradient(to right, var(--color-info), var(--color-primary));
    border-radius: 4px;
    outline: none;
}

.split-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    background: var(--color-bg-primary);
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

/* Firefox slider support */
.split-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: var(--color-bg-primary);
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.split-slider::-moz-range-track {
    height: 8px;
    background: linear-gradient(to right, var(--color-info), var(--color-primary));
    border-radius: 4px;
}

.split-label-left,
.split-label-right {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    min-width: 60px;
}

.split-label-left {
    text-align: right;
}

.split-label-right {
    text-align: left;
}

.split-value {
    text-align: center;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-top: var(--spacing-sm);
}

/* ===================
   Radio & Checkbox Groups
   =================== */

.radio-group,
.checkbox-group {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.radio-label,
.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.radio-label:hover,
.checkbox-label:hover {
    border-color: var(--color-primary);
    background-color: var(--color-bg-secondary);
}

.radio-label:has(input:checked),
.checkbox-label:has(input:checked) {
    border-color: var(--color-primary);
    background-color: var(--color-bg-tertiary);
}

/* ===================
   Balance Cards
   =================== */

.balance-summary {
    display: grid;
    gap: var(--spacing-md);
}

.balance-card {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
}

.balance-partner {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.balance-amount {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xs);
}

.balance-amount.positive {
    color: var(--color-success);
}

.balance-amount.negative {
    color: var(--color-danger);
}

.balance-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

/* ===================
   Receipt List
   =================== */

.filter-bar {
    margin-bottom: var(--spacing-md);
}

.receipt-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.receipt-item {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    gap: var(--spacing-md);
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.receipt-item:hover {
    background-color: var(--color-bg-tertiary);
}

.receipt-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.receipt-store {
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.receipt-amount {
    font-weight: var(--font-weight-semibold);
}

.receipt-status {
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
}

.receipt-status.settled {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.receipt-status.unsettled {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

/* ===================
   Settings Sections
   =================== */

.settings-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.settings-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.settings-section h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
}

.input-group {
    display: flex;
    gap: var(--spacing-sm);
}

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

.partner-list {
    margin-top: var(--spacing-md);
}

.partner-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.partner-name {
    font-weight: var(--font-weight-medium);
}

.partner-username {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.pending-invites {
    margin-top: var(--spacing-lg);
}

.pending-invites h4 {
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-sm);
}

.invite-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-info-bg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.invite-item .invite-text {
    flex: 1;
    min-width: 150px;
}

.invite-item .invite-buttons {
    display: flex;
    gap: var(--spacing-xs);
}

/* ===================
   Empty & Error States
   =================== */

.empty-state,
.error-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-muted);
}

.empty-text,
.error-text,
.hint-text {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.error-text {
    color: var(--color-danger);
}

/* ===================
   Search Results
   =================== */

.search-bar {
    margin-bottom: var(--spacing-md);
}

.search-results {
    min-height: 200px;
}

.search-result-item {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
    cursor: pointer;
}

.search-result-item:hover {
    background-color: var(--color-bg-secondary);
}

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

/* ===================
   Accessibility
   =================== */

/* Skip to content link */
.skip-link {
    position: absolute;
    top: -100px;
    left: var(--spacing-sm);
    z-index: var(--z-tooltip);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-primary);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: var(--font-weight-semibold);
}

.skip-link:focus {
    top: var(--spacing-sm);
}

/* Visually hidden but accessible to screen readers */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.visually-hidden:focus {
    position: fixed;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    z-index: var(--z-tooltip);
    width: auto;
    height: auto;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-primary);
    clip: auto;
}

/* ===================
   Reduced Motion
   =================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ===================
   Receipt Editor
   =================== */

.btn-back {
    margin-right: var(--spacing-sm);
    color: var(--color-text-secondary);
}

.btn-back:hover {
    color: var(--color-text-primary);
    background-color: var(--color-bg-tertiary);
}

.view-header:has(.btn-back) {
    display: flex;
    align-items: center;
}

/* Receipt Info Card */
.receipt-info-card,
.receipt-detail-card {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.receipt-image-container {
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.receipt-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius-md);
    object-fit: contain;
}

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

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.info-value {
    font-weight: var(--font-weight-medium);
}

.info-value.store-name {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.status-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

.status-badge.settled {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.status-badge.open {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

/* Items Section */
.items-section {
    margin-bottom: var(--spacing-lg);
}

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

.items-header h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin: 0;
}

.item-count {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.items-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Item Card (Editor) */
.item-card {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    border-left: 4px solid var(--color-primary);
}

.item-card.subitem {
    margin-left: var(--spacing-lg);
    border-left-color: var(--color-info);
    background-color: var(--color-bg-tertiary);
}

.item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.item-name {
    font-weight: var(--font-weight-medium);
    flex: 1;
    min-width: 0;
    word-break: break-word;
}

.item-amount {
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-lg);
    white-space: nowrap;
}

.item-amount.negative {
    color: var(--color-success);
}

.suggestion-badge {
    font-size: var(--font-size-xs);
    padding: 2px var(--spacing-xs);
    background-color: var(--color-info-bg);
    color: var(--color-info);
    border-radius: var(--radius-sm);
    margin-left: var(--spacing-sm);
}

/* Slider Container */
.slider-container {
    padding-top: var(--spacing-sm);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.slider-label-left,
.slider-label-right {
    color: var(--color-text-muted);
    min-width: 60px;
}

.slider-label-left {
    text-align: left;
}

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

.slider-value {
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    min-width: 50px;
    text-align: center;
}

/* Quick Buttons */
.quick-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.btn-quick {
    flex: 1;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-bg-primary);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.btn-quick:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-quick.active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-primary-contrast);
}

/* Summary Section */
.summary-section {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.summary-row.total-row {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    border-bottom: 2px solid var(--color-border);
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.summary-label {
    color: var(--color-text-secondary);
}

.summary-value {
    font-weight: var(--font-weight-semibold);
}

.your-share-row .summary-value {
    color: var(--color-primary);
}

.partner-share-row .summary-value {
    color: var(--color-info);
}

/* Items Readonly (Receipt Detail View) */
.items-section.readonly .item-row {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.items-section.readonly .item-row:last-child {
    border-bottom: none;
}

.items-section.readonly .item-row.subitem {
    padding-left: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.item-split {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    min-width: 40px;
    text-align: center;
}

.total-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-md);
    border-top: 2px solid var(--color-border);
    font-weight: var(--font-weight-bold);
}

/* Form Actions with multiple buttons */
.form-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.form-actions .btn {
    flex: 1;
    min-width: 120px;
}

/* Mobile adjustments for editor */
@media (max-width: 480px) {
    .item-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .item-amount {
        align-self: flex-end;
    }

    .quick-buttons {
        flex-wrap: wrap;
    }

    .btn-quick {
        flex-basis: calc(33% - var(--spacing-sm));
    }

    .slider-labels {
        font-size: var(--font-size-xs);
    }

    .slider-label-left,
    .slider-label-right {
        min-width: 50px;
    }
}

/* ===================
   Modal Dialogs
   =================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-md);
    animation: fadeIn 0.2s ease;
}

.modal {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s ease;
}

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

.modal-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-tertiary);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

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

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.modal-footer .btn {
    flex: 1;
}

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

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

/* Empty items hint */
.empty-items-hint {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-secondary);
}

.empty-items-hint .empty-text {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.empty-items-hint .empty-hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

/* Items header with add button */
.items-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.items-header h3 {
    margin: 0;
}

.items-header .item-count {
    flex: 1;
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
}

.items-header .btn-small {
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
}