[x-cloak] { display: none !important; }

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

:root {
    --color-primary: #2563eb;
    --color-bg: #ffffff;
    --color-text: #1f2937;
    --color-border: #e5e7eb;
    --color-muted: #6b7280;
    --color-success: #16a34a;
    --color-danger: #dc2626;
    --radius: 8px;
}

html {
    overflow-y: scroll;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    max-width: 640px;
    margin: 0 auto;
    padding: 24px 16px;
}

header {
    margin-bottom: 12px;
}

#header-logo {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.logo-vocab {
    color: #2563eb;
}

.logo-dot {
    color: #f97316;
}

.logo-cards {
    color: #f97316;
}

nav {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 8px;
}

.nav-btn {
    background: none;
    border: none;
    padding: 6px 12px;
    font-size: 0.875rem;
    color: var(--color-muted);
    cursor: pointer;
    border-radius: var(--radius);
}

.nav-btn.active {
    color: var(--color-text);
    font-weight: 600;
}

.nav-right {
    margin-left: auto;
}

section {
    margin-bottom: 24px;
}

section h2 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-muted);
    margin-bottom: 12px;
}

section h3 {
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-muted);
    margin-bottom: 8px;
    margin-top: 16px;
}

/* Auth */

#auth-view {
    max-width: 440px;
    margin: 100px auto;
    padding: 40px 48px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

#auth-logo {
    display: block;
    width: 150px;
    margin: 0 auto 24px;
}

#auth-view h2 {
    font-size: 1.25rem;
    text-transform: none;
    letter-spacing: normal;
    color: var(--color-text);
    margin-bottom: 28px;
    text-align: center;
}

#auth-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

#auth-form input {
    padding: 12px 16px;
    font-size: 1.0625rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    outline: none;
}

#auth-form input:focus {
    border-color: var(--color-primary);
}

#auth-toggle {
    margin-top: 24px;
    font-size: 0.875rem;
    color: var(--color-muted);
    text-align: center;
}

#auth-toggle a {
    color: var(--color-primary);
    text-decoration: none;
}

#auth-error, .decks-error {
    margin-top: 8px;
    color: var(--color-danger);
    font-size: 0.875rem;
    text-align: center;
}

/* Search */

#search-form {
    display: flex;
    gap: 8px;
}

#search-input-wrapper {
    flex: 1;
    position: relative;
}

#search-input {
    width: 100%;
    padding: 10px 36px 10px 14px;
    font-size: 1.125rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    outline: none;
}

#search-input::-webkit-search-cancel-button {
    display: none;
}

#search-input:focus {
    border-color: var(--color-primary);
}

.clear-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-muted);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
}

#search-input.input-error {
    border-color: var(--color-danger);
}

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-muted);
    cursor: pointer;
}

.icon-btn:hover {
    color: var(--color-text);
    border-color: var(--color-text);
}

.cycle-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-muted);
    font-size: 0.85rem;
    cursor: pointer;
    margin-top: 8px;
}

.cycle-btn:hover {
    color: var(--color-text);
    border-color: var(--color-text);
}

#definition-section {
    margin-top: 16px;
    padding: 0 8px;
}

.more-results {
    width: 100%;
    margin-top: 12px;
}

/* Buttons */

button[type="submit"]:not(.icon-btn),
.btn-primary {
    padding: 10px 20px;
    font-size: 1rem;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
}

.btn-secondary {
    padding: 6px 14px;
    font-size: 0.875rem;
    background: none;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius);
    cursor: pointer;
}

.btn-danger {
    padding: 6px 14px;
    font-size: 0.875rem;
    background: none;
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
    border-radius: var(--radius);
    cursor: pointer;
}

.icon-btn-danger {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-muted);
    cursor: pointer;
}

.icon-btn-danger:hover {
    color: var(--color-danger);
    border-color: var(--color-danger);
}

/* Word entries */

.word-entry {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
}

.word-entry > button {
    flex-shrink: 0;
}

.word-entry:last-child {
    border-bottom: none;
}

.word-heading {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 4px;
}

.audio-btn {
    width: 32px;
    height: 32px;
}

.word-word {
    font-size: 1.25rem;
}

.word-pronunciation {
    font-size: 0.9375rem;
    color: var(--color-muted);
}

.word-definitions {
    list-style: none;
    padding: 0;
    margin-top: 4px;
}

.word-definitions li {
    padding: 2px 0;
    font-size: 0.875rem;
    color: var(--color-text);
}

.word-added {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-muted);
    cursor: default;
}

/* Image grid */

#review-image-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.image-option {
    position: relative;
    aspect-ratio: 1;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    padding: 0;
    background: none;
}

.image-option img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.image-option.selected {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-primary);
}

.image-option.selected::after {
    content: "\2713";
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--color-primary);
    color: white;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

/* Spinner */

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

.spinner-icon svg {
    animation: spin 1s linear infinite;
}

/* Skeletons */

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.image-skeleton {
    aspect-ratio: 1;
    border-radius: var(--radius);
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

.sentence-skeleton {
    height: 48px;
    border-radius: var(--radius);
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    margin-bottom: 8px;
}

/* Sentences */

.sentence-option {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
    cursor: pointer;
}

.sentence-option:last-child {
    border-bottom: none;
}

.sentence-option input[type="checkbox"] {
    margin-top: 4px;
    flex-shrink: 0;
}

.sentence-text .source {
    display: block;
    font-size: 1.375rem;
}

.sentence-text-en .source {
    font-size: 1rem;
}

.sentence-text .pinyin {
    display: block;
    font-size: 1rem;
    color: var(--color-muted);
    margin-top: 2px;
}

.sentence-text .target {
    display: block;
    font-size: 1rem;
    color: var(--color-muted);
    margin-top: 2px;
}

/* Reviewed groups */

.reviewed-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
    cursor: pointer;
}

.reviewed-group-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.reviewed-group-flag {
    font-size: 1.25rem;
}

.reviewed-group-label {
    font-size: 1rem;
}

.reviewed-group-count {
    font-size: 0.8125rem;
    color: var(--color-muted);
}

.reviewed-group-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}

.chevron {
    color: var(--color-muted);
    transition: transform 0.2s;
}

.chevron.rotated {
    transform: rotate(180deg);
}

.reviewed-words-list {
}

.section-count {
    text-align: right;
    font-size: 0.75rem;
    color: var(--color-muted);
    margin-top: 8px;
}

.reviewed-section {
    margin-top: 32px;
}

.list-empty {
    text-align: center;
    padding: 48px 24px;
    color: var(--color-text);
    background: #f9fafb;
    border-radius: var(--radius);
}

/* Review list */

#review-list-view {
    padding: 0 8px;
}

.list-item {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.list-item-info {
    flex: 1;
}

.list-item-word {
    font-size: 1.25rem;
}

.list-item-word-en {
    font-size: 1rem;
}

.list-item-pronunciation {
    font-size: 0.875rem;
    color: var(--color-muted);
}

.list-item-subtitle {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-muted);
    margin-top: 2px;
}

.list-item-actions {
    display: flex;
    gap: 6px;
}

/* Review panel */

#review-word {
    padding: 16px;
    background: #f9fafb;
    border-radius: var(--radius);
    margin-bottom: 16px;
}

#review-actions {
    margin-top: 20px;
}

#review-save {
    width: 100%;
}

/* Modal */

.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
}

.modal-content {
    position: relative;
    background: var(--color-bg);
    border-radius: var(--radius);
    padding: 24px;
    width: 100%;
    max-width: 360px;
    margin: 0 16px;
}

.modal-content h2 {
    font-size: 1.125rem;
    text-transform: none;
    letter-spacing: normal;
    color: var(--color-text);
    margin-bottom: 16px;
}

.modal-label {
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-muted);
    display: block;
    margin-bottom: 8px;
}

.language-picker {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 20px;
}

.language-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: none;
    cursor: pointer;
    font-size: 0.9375rem;
    color: var(--color-text);
}

.language-option:hover {
    border-color: var(--color-primary);
}

.language-option.active {
    border-color: var(--color-primary);
    background: #eff6ff;
}

.language-option-flag {
    font-size: 1.25rem;
}

.language-option-label {
    font-size: 0.875rem;
}

.settings-error {
    color: var(--color-danger);
    font-size: 0.875rem;
    text-align: center;
    margin-bottom: 12px;
}

#settings-save {
    width: 100%;
}

@media (max-width: 480px) {
    #review-image-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}