:root {
    color-scheme: light;
    --background: #f8f8f5;
    --text: #171717;
    --muted: #62625d;
    --border: #deded7;
    --accent: #111111;
    --accent-text: #ffffff;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 18px;
    line-height: 1.6;
}

.page {
    width: min(760px, calc(100% - 32px));
    margin: 0 auto;
    padding: 48px 0;
}

.intro {
    min-height: 70vh;
    display: grid;
    align-content: center;
}

.topnav {
    display: flex;
    gap: 18px;
    margin-bottom: 56px;
}

.topnav a {
    color: var(--text);
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1 {
    max-width: 680px;
    margin: 0;
    font-size: clamp(42px, 8vw, 76px);
    line-height: 0.96;
}

.lede {
    max-width: 620px;
    margin: 24px 0 32px;
    color: var(--muted);
    font-size: 22px;
}

.button {
    border: 0;
    width: fit-content;
    border-radius: 6px;
    background: var(--accent);
    color: var(--accent-text);
    display: inline-block;
    font-size: 16px;
    font-weight: 700;
    padding: 12px 18px;
    text-decoration: none;
}

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

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.button:focus,
.button:hover {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

.term-form {
    margin: 32px 0;
}

.term-form label {
    display: block;
    margin-bottom: 8px;
    font-size: 16px;
    font-weight: 700;
}

.term-form-row {
    display: flex;
    gap: 12px;
}

.term-form input,
.term-form textarea {
    min-width: 0;
    flex: 1;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #ffffff;
    color: var(--text);
    font: inherit;
    padding: 11px 12px;
}

.term-form textarea {
    width: 100%;
    resize: vertical;
}

.stacked-form {
    display: grid;
    gap: 18px;
}

.form-field {
    display: grid;
    gap: 8px;
}

.practice-page h1 {
    margin: 0 0 24px;
    font-size: 28px;
    line-height: 1.15;
    font-weight: 650;
}

.task-count-form {
    display: flex;
    align-items: end;
    gap: 10px;
    margin: 24px 0;
}

.task-count-form label {
    display: grid;
    gap: 4px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
}

.task-count-form input {
    width: 86px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #ffffff;
    color: var(--text);
    font: inherit;
    font-size: 15px;
    padding: 8px 9px;
}

.practice-task-list {
    margin: 8px 0 0;
}

.practice-task {
    margin: 0;
    padding: 8px 0 14px;
}

.practice-task details {
    margin: 0;
}

.practice-task summary {
    cursor: pointer;
    display: flex;
    gap: 10px;
    align-items: center;
    color: var(--text);
    font-size: 17px;
    font-weight: 600;
    line-height: 1.35;
    list-style: none;
}

.practice-task summary::-webkit-details-marker {
    display: none;
}

.practice-task summary::before {
    content: "▶";
    color: var(--muted);
    flex: 0 0 auto;
    font-size: 11px;
    line-height: 1;
    transform: translateY(1px);
}

.practice-task details[open] summary::before {
    content: "▼";
}

.practice-response {
    width: calc(100% - 24px);
    min-height: 3.1rem;
    margin: 8px 0 0 24px;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 7px 9px;
    background: rgba(255, 255, 255, 0.55);
    color: var(--text);
    font: inherit;
    font-size: 14px;
    line-height: 1.3;
    resize: vertical;
}

.practice-response::placeholder {
    color: var(--muted);
    opacity: 0.72;
}

.standard-feedback {
    display: none;
    margin: 10px 0 2px 24px;
    padding-top: 6px;
}

.practice-task details[open] ~ .standard-feedback {
    display: block;
}

.standard-feedback h2 {
    margin: 0 0 7px;
    font-size: 15px;
    font-weight: 650;
}

.standard-box {
    display: grid;
    gap: 5px;
    width: min(360px, 100%);
    margin: 0 0 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 10px;
    background: rgba(255, 255, 255, 0.45);
    color: var(--muted);
    font-size: 13px;
}

.standard-box label {
    display: inline-flex;
    gap: 6px;
    align-items: center;
}

.standard-feedback p,
.standard-examples {
    max-width: 640px;
    font-size: 14px;
}

.standard-feedback p {
    margin: 0;
}

.standard-examples {
    margin: 8px 0 0;
    padding-left: 1.2em;
}

.form-error,
.message {
    margin: 12px 0 0;
    font-size: 16px;
}

.form-error,
.message-error {
    color: #9d1c1c;
}

.message-success {
    color: #1f6f3d;
}

.existing-term-review {
    border-top: 1px solid var(--border);
    margin: 32px 0;
    padding-top: 24px;
}

.existing-term-review h2,
.existing-term-review h3 {
    margin: 0 0 8px;
}

.existing-term-list {
    margin: 20px 0;
    padding-left: 1.4em;
}

.existing-term-list > li {
    border-top: 1px solid var(--border);
    padding: 16px 0;
}

.text-button {
    border: 0;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    font: inherit;
    font-weight: 700;
    padding: 0;
    text-decoration: underline;
}

.text-button:focus,
.text-button:hover {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

.feedback {
    border-top: 1px solid var(--border);
    margin-top: 28px;
    padding-top: 24px;
}

.feedback h2,
.feedback h3 {
    margin: 0 0 8px;
}

.feedback-section {
    border-top: 1px solid var(--border);
    margin-top: 20px;
    padding-top: 18px;
}

.overall-score,
.target-score {
    font-weight: 700;
}

.checklist {
    list-style: none;
    margin: 12px 0;
    padding: 0;
}

.term-list {
    margin: 32px 0 0;
    padding-left: 1.4em;
}

.term-list li {
    border-top: 1px solid var(--border);
    padding: 18px 0;
}

.term-list li:last-child {
    border-bottom: 1px solid var(--border);
}

.term-selection-form {
    margin-top: 32px;
}

.term-selection-form .term-list {
    margin-top: 14px;
}

.term-selection {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.term-selection input {
    margin-top: 7px;
}

.term-context {
    color: var(--muted);
}

.term-edit-link {
    color: var(--text);
    display: inline-block;
    font-size: 15px;
    font-weight: 700;
    margin-left: 8px;
}

.pronounce-button {
    border: 1px solid var(--border);
    border-radius: 999px;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    margin: 0 4px;
    padding: 5px 7px;
    vertical-align: middle;
}

.pronounce-button:disabled {
    cursor: not-allowed;
    opacity: 0.45;
}

.pronounce-button:focus,
.pronounce-button:hover:not(:disabled) {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

@media (max-width: 640px) {
    .term-form-row {
        display: grid;
    }
}