@import url("components/console.css?v=compact-skill-preview-1");
@import url("components/sidebar.css?v=plus-brand-1");
@import url("components/card.css?v=free-trial-badge-1");
@import url("components/auth.css?v=profile-membership-1");
@import url("components/quiz.css?v=quiz-leave-4");
@import url("components/admin.css?v=email-membership-2");
@import url("components/home.css?v=practice-actions-1");
@import url("components/result-history.css?v=compact-history-1");
@import url("components/contact.css?v=line-button-1");
@import url("components/upgrade.css?v=1");
:root {
    color-scheme: light;
    --canvas: #f7f9fa;
    --surface: #ffffff;
    --surface-alt: #eef2f3;
    --ink: #233137;
    --muted: #57686f;
    --line: #d7e0e3;
    --control-line: #80929b;
    --accent: #176b58;
    --accent-hover: #11513f;
    --accent-soft: #e9f4ef;
    --on-accent: #ffffff;
    --danger: #b3333b;
    --danger-soft: #fff0f1;
    --success: #176b58;
    --focus: #176b58;
    --backdrop: #15212680;
    --radius: 10px;
    --shadow: none;
    --text-xs: 13px;
    --text-sm: 14px;
    --text-md: 16px;
    --text-lg: 18px;
    --heading-sm: 20px;
    --heading-md: 24px;
    --heading-lg: 28px;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --canvas: #141a1e;
    --surface: #1b2328;
    --surface-alt: #242e34;
    --ink: #e3ebed;
    --muted: #a7b8bf;
    --line: #3e4d54;
    --control-line: #61747e;
    --accent: #77cfb0;
    --accent-hover: #a0e1c9;
    --accent-soft: #203d34;
    --on-accent: #10251d;
    --danger: #ff9aa2;
    --danger-soft: #42262d;
    --success: #77cfb0;
    --focus: #77cfb0;
    --backdrop: #000000a0;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--canvas);
    color: var(--ink);
    font: var(--text-md)/1.7 "Segoe UI", "Leelawadee UI", Tahoma, sans-serif;
    -webkit-font-smoothing: antialiased;
}

button, input, select, textarea {
    font: inherit;
}

a {
    color: var(--accent);
    text-underline-offset: 3px;
}

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

h1, h2, h3, h4, p {
    margin: 0;
}

h1, h2, h3, h4 {
    line-height: 1.5;
    font-weight: 650;
    letter-spacing: 0;
    overflow-wrap: anywhere;
}

h1 {
    font-size: var(--heading-lg);
}

h2 {
    font-size: var(--heading-md);
}

h3 {
    font-size: var(--heading-sm);
}

h4 {
    font-size: var(--text-lg);
}

p + p {
    margin-top: 12px;
}

small, .muted {
    color: var(--muted);
    font-size: var(--text-xs);
}

button, .button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 10px 16px;
    border: 1px solid transparent;
    border-radius: 8px;
    background: var(--accent);
    color: var(--on-accent);
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: 1.5;
    text-decoration: none;
    cursor: pointer;
    transition: background .15s, border-color .15s;
}

button:hover, .button:hover {
    background: var(--accent-hover);
    color: var(--on-accent);
}

button:disabled {
    opacity: .55;
    cursor: not-allowed;
}

.button.secondary, button.secondary {
    background: var(--surface);
    border-color: var(--control-line);
    color: var(--ink);
}

.button.secondary:hover, button.secondary:hover {
    background: var(--surface-alt);
    border-color: var(--muted);
    color: var(--ink);
}

:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 3px;
}

[hidden] {
    display: none !important;
}

input, select, textarea {
    width: 100%;
    min-width: 0;
    min-height: 44px;
    padding: 10px 12px;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--control-line);
    border-radius: 8px;
    line-height: 1.5;
}

textarea {
    resize: vertical;
    line-height: 1.7;
}

.registration-birth-date {
    display: flex;
    align-items: center;
    border: 1px solid var(--control-line);
    border-radius: 8px;
    background: var(--surface);
}
.registration-birth-date:focus-within { border-color: var(--focus); }
.registration-birth-date > input {
    width: 0;
    flex: 1;
    padding: 10px 4px;
    border: 0;
    text-align: center;
}
.registration-birth-date > #birth_year { flex: 1.4; }
.registration-birth-calendar { position: relative; width: 44px; height: 44px; flex-shrink: 0; }
.registration-birth-calendar input { position: absolute; inset: 0; opacity: 0; cursor: pointer; padding: 0; }
.registration-birth-calendar svg { width: 20px; height: 20px; margin: 12px; fill: none; stroke: currentColor; stroke-width: 1.5; pointer-events: none; }

input:focus, select:focus, textarea:focus {
    border-color: var(--focus);
}

input:disabled, select:disabled {
    color: var(--muted);
    background: var(--surface-alt);
}

input::placeholder, textarea::placeholder {
    color: var(--muted);
    opacity: 1;
}

input[type="checkbox"], input[type="radio"] {
    width: 20px;
    height: 20px;
    min-height: 20px;
    margin: 2px 0;
    flex-shrink: 0;
    accent-color: var(--accent);
}

label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: 6px;
}

.eyebrow {
    font-size: var(--text-xs);
    color: var(--muted);
    font-weight: 500;
    letter-spacing: .3px;
    margin-bottom: 8px;
}

.app-main {
    margin-left: 224px;
    min-height: 100vh;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    min-height: 64px;
    padding: 12px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    border-bottom: 1px solid var(--line);
    background: var(--surface);
    font-size: var(--text-sm);
}

.site-header { position: sticky; top: 0; z-index: 30; background: var(--surface); }
.site-header .topbar { position: static; }
.site-announcement {
    display: flex; align-items: baseline; gap: 10px; padding: 4px 32px;
    max-height: min(240px, 30vh); overflow-y: auto;
    background: #e6f2ed; color: #245443; border-bottom: 1px solid #c7dfd3;
    font-size: var(--text-xs); line-height: 1.5;
}
.site-announcement[hidden] { display: none; }
.site-header > .site-announcement { margin: 0; }
.site-announcement time { flex-shrink: 0; font-weight: 600; font-size: var(--text-xs); }
.site-announcement [data-announcement-message] { white-space: pre-wrap; overflow-wrap: anywhere; min-width: 0; }
html[data-theme="dark"] .site-announcement { background: #203a32; color: #d6eee3; border-color: #35594b; }
.announcement-preview { white-space: pre-wrap; overflow-wrap: anywhere; background: #e6f2ed; color: #245443; padding: 12px; }
html[data-theme="dark"] .announcement-preview { background: #203a32; color: #d6eee3; }
.announcement-checkbox { display: flex; align-items: center; gap: 8px; }
.announcement-checkbox input { width: auto; }
.announcement-table-wrap { overflow-x: auto; }
.announcement-table { width: 100%; min-width: 940px; border-collapse: collapse; }
.announcement-table th, .announcement-table td { padding: 10px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.announcement-table td:nth-child(2) { min-width: 200px; max-width: 420px; white-space: pre-wrap; overflow-wrap: anywhere; }
@media (max-width: 760px) { .site-announcement { padding: 4px 20px; flex-wrap: wrap; gap: 2px 8px; } }

.topbar-trail {
    display: flex;
    gap: 8px;
    align-items: center;
    color: var(--muted);
    min-width: 0;
}

.topbar-trail span:last-child {
    color: var(--ink);
    overflow-wrap: anywhere;
}

.topbar a {
    text-decoration: none;
    white-space: nowrap;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-shrink: 0;
    flex-wrap: wrap;
}

.appearance-controls { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.account-menu { position: relative; min-width: 0; margin-left: auto; }
.account-menu-toggle {
    display: flex; align-items: center; gap: 10px; cursor: pointer;
    padding: 6px 0; border: 0;
    list-style: none; color: var(--ink); background: transparent; white-space: nowrap;
}
.account-menu-toggle::-webkit-details-marker { display: none; }
.account-menu-toggle:hover { color: var(--accent); }
.account-menu-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.account-menu #account-name { max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.account-menu-toggle .account-badge {
    font-size: var(--text-xs); padding: 0; margin: 0; border: 0;
    background: transparent; color: var(--muted);
}
.account-menu .username { margin: 0; }
.account-menu .user-box { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.account-menu .account-name-row { margin: 0; flex-wrap: nowrap; }
.account-menu-extras { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 12px; }
.account-menu-extras > span { color: var(--muted); font-size: var(--text-xs); }
.account-menu-membership { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 2px 12px; padding: 10px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: var(--text-xs); }
.account-menu-membership small { color: var(--accent); font-size: inherit; }
.account-menu-chevron { flex-shrink: 0; }
.account-menu-panel {
    position: absolute; right: 0; top: calc(100% + 8px); z-index: 40;
    width: min(240px, calc(100vw - 40px)); padding: 6px;
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
    box-shadow: 0 8px 24px rgb(0 0 0 / 12%);
}
.account-menu-panel > a, .account-menu-panel #logout-btn {
    display: block; width: 100%; margin: 0; padding: 10px 12px;
    text-align: left; font: inherit; color: var(--ink); background: transparent;
    border: 0; border-radius: 4px; white-space: normal;
}
.account-menu-panel > a:hover, .account-menu-panel #logout-btn:hover { background: var(--surface-alt); }
.account-menu-panel [role="status"] { padding: 0 12px; }
@media (max-width: 420px) {
    .account-menu #account-name { max-width: 90px; }
    .account-menu .user-box { gap: 6px; }
    .topbar .topbar-actions { gap: 8px; }
}

.theme-control {
    display: inline-flex;
    align-items: center;
    gap: 2px;
}
.theme-control button {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    min-height: 30px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    color: var(--muted);
    background: transparent;
}
.theme-control button:hover { color: var(--accent); background: var(--accent-soft); }
.theme-control button[aria-pressed="true"] {
    color: var(--accent);
    background: var(--accent-soft);
}
.theme-control button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.theme-control svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

.content {
    max-width: 1120px;
    margin: auto;
    padding: 32px;
}

.page-heading {
    margin-bottom: 24px;
}

.page-heading p:not(.eyebrow) {
    color: var(--muted);
    margin-top: 8px;
    font-size: var(--text-sm);
}

.page-footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px;
    color: var(--muted);
    font-size: var(--text-xs);
}

.skip-link {
    position: fixed;
    left: 12px;
    top: -100px;
    z-index: 100;
    background: var(--surface);
    padding: 12px;
}

.skip-link:focus {
    top: 12px;
}

.status:empty, [role="status"]:empty, #score:empty, #result-time:empty {
    display: none;
}

[role="status"] {
    margin-top: 16px;
    font-size: var(--text-sm);
    overflow-wrap: anywhere;
}

dialog {
    width: min(720px, 92vw);
    max-height: 85vh;
    overflow: auto;
    padding: 24px;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}

dialog::backdrop {
    background: var(--backdrop);
}

dialog h2 {
    margin-bottom: 16px;
}

.language-control {
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 2px;
    font-size: var(--text-sm);
    margin: 0;
}

.language-control a { display: flex; align-items: center; justify-content: center; min-width: 40px; min-height: 44px; border-radius: 4px; color: var(--muted); font-weight: 500; letter-spacing: .03em; }
.language-control a:hover { color: var(--accent); background: var(--accent-soft); }
.language-control a[aria-current="true"] { color: var(--accent); font-weight: 750; text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 6px; }
.language-divider { color: var(--line); }
#language-message:not(:empty) { margin: 12px 24px; color: var(--danger); }

#language-message:empty {
    display: none;
}

.legal-content {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    line-height: 1.8;
    max-width: 720px;
}

#draft-editor, #review-dialog {
    width: min(850px, 92vw);
}

#draft-form {
    display: grid;
    gap: 12px;
    max-width: none;
}

#draft-content {
    min-height: 20rem;
}

#review-details {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

#student-list button {
    margin: 4px;
}

.legal-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    min-width: 220px;
}

.admin-table .legal-actions > button,
.admin-table .legal-actions > a {
    margin: 0;
    padding: 8px 12px;
    min-height: 40px;
    white-space: normal;
    text-align: center;
    max-width: 100%;
}

.form-grid > .full {
    grid-column: 1 / -1;
}

.privacy-choice {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin: 16px 0;
    font-weight: 400;
}

#marketing-choice {
    margin: 16px 0;
    padding: 16px;
    background: var(--surface-alt);
    border-radius: 8px;
}

#definitions-status {
    margin: 12px 0;
}

.privacy-panel > p, .privacy-panel > h2 {
    margin: 16px 0;
}

#consent-history li {
    margin-bottom: 16px;
    overflow-wrap: anywhere;
}

#learner-choice {
    margin: 16px 0;
}

#learner-choice button {
    margin-top: 12px;
}

.form-feedback:not(:empty) {
    padding: 14px;
    border: 1px solid currentColor;
    border-radius: 8px;
}

.form-feedback.error, .field-error {
    color: var(--danger);
}

.form-feedback.error {
    background: var(--danger-soft);
}

.form-feedback.success {
    color: var(--success);
    background: var(--accent-soft);
}

input[aria-invalid="true"] {
    border-color: var(--danger);
}

.grade-navigation {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.grade-navigation a[aria-current="page"] {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
}

.term-color-1 { --chapter-color: #147b91; --chapter-soft: rgba(20, 123, 145, .12); }
.term-color-2 { --chapter-color: #a36118; --chapter-soft: rgba(163, 97, 24, .12); }
[data-theme="dark"] .term-color-1 { --chapter-color: #68d4e8; }
[data-theme="dark"] .term-color-2 { --chapter-color: #ffc479; }
.chapter-term-legend { display: flex; gap: 20px; margin-bottom: 12px; font-size: var(--text-sm); }
.chapter-term-legend span { color: var(--chapter-color); font-weight: 600; }
.chapter-term-legend span::before { content: ''; display: inline-block; width: 10px; height: 10px; border-radius: 50%; background: var(--chapter-color); margin-right: 8px; }
.chapter-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.chapter-tabs a { min-height: 44px; padding: 10px 16px; border: 1px solid var(--chapter-color); border-radius: 10px; color: var(--chapter-color); background: var(--chapter-soft); font-size: var(--text-sm); font-weight: 600; text-decoration: none; }
.chapter-tabs a[aria-selected="true"] { background: var(--chapter-color); color: #fff; }
[data-theme="dark"] .chapter-tabs a[aria-selected="true"] { color: #142b34; }
.chapter-tabs a:focus-visible { outline: 3px solid var(--chapter-color); outline-offset: 3px; }
.chapter-panel { border-top: 3px solid var(--chapter-color); padding-top: 20px; }
.chapter-panel .level-grid { grid-template-columns: minmax(0, 1fr); }
.chapter-panel > .eyebrow { color: var(--chapter-color); }
.chapter-panel[hidden] { display: none; }
.lesson-code { display: inline-block; margin-inline-start: 8px; padding: 3px 9px; border: 1px solid var(--accent); border-radius: 6px; background: var(--accent-soft); color: var(--accent); font-size: .8em; font-weight: 600; vertical-align: middle; white-space: nowrap; }

@media (max-width: 1000px) {
    .content {
        padding: 24px;
    }
    .topbar {
        padding: 12px 24px;
    }
    .topbar-trail > span:first-child, .topbar-trail > span:nth-child(2) {
        display: none;
    }
}

@media (max-width: 760px) {
    .app-main {
        margin-left: 0;
    }
    .topbar {
        padding: 10px 20px;
        min-height: 60px;
    }
    .topbar-trail {
        display: none;
    }
    .topbar-actions {
        width: 100%;
        justify-content: space-between;
        gap: 12px;
    }
    .content {
        padding: 24px 20px;
    }
    .page-footer {
        flex-direction: column;
        gap: 8px;
    }
}

@media (max-width: 380px) {
    .content, .topbar {
        padding-left: 16px;
        padding-right: 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition: none !important;
        animation: none !important;
        scroll-behavior: auto !important;
    }
}

/* A usable automatic theme remains available when JavaScript is disabled. */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        color-scheme: dark;
        --canvas: #141a1e;
        --surface: #1b2328;
        --surface-alt: #242e34;
        --ink: #e3ebed;
        --muted: #a7b8bf;
        --line: #3e4d54;
        --control-line: #61747e;
        --accent: #77cfb0;
        --accent-hover: #a0e1c9;
        --accent-soft: #203d34;
        --on-accent: #10251d;
        --danger: #ff9aa2;
        --danger-soft: #42262d;
        --success: #77cfb0;
        --focus: #77cfb0;
        --backdrop: #000000a0;
    }
}