:root {
    --bg: #f4f1ea;
    --fg: #2b2620;
    --card-bg: #fffdf8;
    --card-border: #d8cfbe;
    --accent: #a8622b;
    --accent-fg: #ffffff;
    --muted: #7a7264;
    --danger: #a3402f;
    --success: #4a7c3f;
    --success-fg: #ffffff;
    --box-fill: #c9a876;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #201d18;
        --fg: #ece6da;
        --card-bg: #2b2620;
        --card-border: #453f34;
        --accent: #d38a4f;
        --accent-fg: #201d18;
        --muted: #a89d8a;
        --danger: #e17a63;
        --success: #79b56a;
        --success-fg: #16240f;
        --box-fill: #6b5a3b;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 1.5rem 1rem 3rem;
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.5;
}

.wrap {
    max-width: 640px;
    margin: 0 auto;
}

.wrap.wrap-wide {
    max-width: 1100px;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

h1 {
    font-size: 1.5rem;
    margin: 0 0 1rem;
}

h1 a {
    color: inherit;
    text-decoration: none;
}

.gear-link {
    font-size: 1.5rem;
    text-decoration: none;
    line-height: 1;
    margin-bottom: 1rem;
}

a {
    color: var(--accent);
}

.muted {
    color: var(--muted);
    font-size: 0.9rem;
}

.user-switch {
    color: var(--muted);
    font-size: 0.85rem;
    margin: -0.5rem 0 1rem;
}

.user-switch a {
    color: var(--muted);
    text-decoration: underline;
}

.deck-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.deck-list li {
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 0.9rem 1rem;
    margin-bottom: 0.75rem;
}

.progress-pill {
    position: absolute;
    top: 0.75rem;
    right: 0.9rem;
    background: var(--accent);
    color: var(--accent-fg);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.15rem 0.55rem;
    border-radius: 999px;
    white-space: nowrap;
}

.deck-list .deck-name {
    font-weight: 600;
    font-size: 1.05rem;
    padding-right: 7.5rem;
}

.deck-list .deck-actions {
    margin-top: 0.5rem;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    border: none;
    border-radius: 8px;
    padding: 0.6rem 1.1rem;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    background: var(--accent);
    color: var(--accent-fg);
}

.btn.secondary {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}

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

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

.top-actions {
    margin-bottom: 1.25rem;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.flashcard {
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 3rem 1.5rem;
    text-align: center;
    min-height: 8rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.edit-link {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    font-size: 1.725rem;
    text-decoration: none;
    opacity: 0.85;
}

.edit-link:hover {
    opacity: 1;
}

.box-badge {
    position: absolute;
    top: 0.9rem;
    left: 0.9rem;
    font-size: 0.75rem;
    color: var(--muted);
    background: var(--bg);
    border: 1px solid var(--card-border);
    border-radius: 999px;
    padding: 0.15rem 0.6rem;
}

.case-hint {
    color: var(--muted);
    font-size: 0.9rem;
}

.case-hint strong {
    color: var(--fg);
}

.flashcard .lang-label {
    color: var(--muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.flashcard .word {
    font-size: 1.8rem;
    font-weight: 600;
}

.flashcard .word.back {
    color: var(--accent);
}

.flashcard .word.match {
    color: var(--success);
}

.flashcard .word.nomatch {
    color: var(--danger);
}

.check-icon {
    display: inline-block;
    margin-left: 0.5rem;
    color: var(--success);
    font-size: 1.6rem;
    font-weight: 900;
    vertical-align: middle;
}

.flashcard hr {
    width: 60%;
    border: none;
    border-top: 1px solid var(--card-border);
    margin: 0.75rem 0;
}

.answer-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.answer-actions .btn {
    flex: 1;
    max-width: 12rem;
    padding: 0.9rem;
    font-size: 1.05rem;
    transition: none;
}

.answer-actions .btn-suggested {
    flex: 1.7;
    max-width: none;
    padding: 1.3rem;
    font-size: 1.35rem;
    font-weight: 700;
}

.answer-actions .btn-minor {
    flex: 0.7;
    padding: 0.5rem;
    font-size: 0.85rem;
    opacity: 0.65;
}

.type-form {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.type-form input[type="text"] {
    flex: 1 1 10rem;
    min-width: 0;
    padding: 0.9rem 1rem;
    font-size: 1.1rem;
    border: 1px solid var(--card-border);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--fg);
}

.type-form .btn {
    flex: 0 0 auto;
    padding: 0.9rem 1.3rem;
    font-size: 1.05rem;
}

.skip-btn {
    padding: 0.4rem 0.5rem;
    font-size: 1.6rem;
    line-height: 1;
}

.stat-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-bottom: 1.25rem;
}

.stat-card {
    flex: 1;
    min-width: 5.5rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 0.6rem 0.5rem;
    text-align: center;
}

.stat-primary {
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1.2;
    white-space: nowrap;
}

.stat-secondary {
    font-size: 0.75rem;
    color: var(--muted);
    margin-top: 0.2rem;
}

.done-message {
    text-align: center;
    padding: 3rem 1rem;
}

.box-bars-wrap {
    margin-top: 2.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--card-border);
}

.box-bars {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    margin-top: 0.5rem;
}

.box-bars .box {
    flex: 1;
    min-width: 2.8rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--muted);
}

.box-bars .box .bar {
    background: var(--box-fill);
    border-radius: 4px;
    height: 6px;
    margin-bottom: 0.25rem;
}

.box-bars .box .box-interval {
    font-size: 0.65rem;
    opacity: 0.75;
    margin-top: 0.15rem;
}

table.cards {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

table.cards th,
table.cards td {
    text-align: left;
    padding: 0.4rem 0.5rem;
    border-bottom: 1px solid var(--card-border);
}

table.cards th {
    color: var(--muted);
    font-weight: 600;
}

table.cards th[data-sort] {
    cursor: pointer;
    user-select: none;
}

table.cards th[data-sort]:hover {
    color: var(--fg);
}

.sort-arrow {
    font-size: 0.7rem;
}

form.inline {
    display: inline;
}

.form-box {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
}

.form-box label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.3rem;
    margin-top: 0.9rem;
}

.form-box label:first-child {
    margin-top: 0;
}

.form-box input[type="text"],
.form-box select,
.form-box input[type="file"] {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--card-border);
    border-radius: 6px;
    background: var(--bg);
    color: var(--fg);
    font-size: 1rem;
}

.form-box .checkbox-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.9rem;
}

.form-box .checkbox-row label {
    margin: 0;
    font-weight: normal;
}

.form-box .row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.form-box .row > div {
    min-width: 4rem;
    flex: 1;
}

.form-box .row > .flag-field {
    flex: 0 0 4.5rem;
}

.form-box .row > .flag-field input {
    text-align: center;
    font-size: 1.4rem;
    padding: 0.4rem;
}

.preview-table-wrap {
    overflow-x: auto;
    margin: 1rem 0;
}

.flash-message {
    background: var(--success);
    color: #fff;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}