:root {
    --color-bg: #fbfaf7;
    --color-surface: #ffffff;
    --color-ink: #202124;
    --color-muted: #696f75;
    --color-border: #d8d6cf;
    --color-border-strong: #b8b5ad;
    --color-accent: #1f5f8f;
    --color-accent-dark: #164568;
    --color-accent-soft: #e7f0f6;
    --color-warning-bg: #fff6df;
    --color-warning-border: #dcc27a;
    --color-success-bg: #edf6ee;
    --color-success-border: #a8c9ad;
    --radius: 6px;
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 14px;
    --space-lg: 22px;
    --space-xl: 34px;
    --font-ui: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-display: "Bodoni 73 Smallcaps", "Bodoni 72 Smallcaps", "Bodoni 72", Didot, "Bodoni MT", Georgia, "Times New Roman", serif;
}

* {
    box-sizing: border-box;
}

[hidden] {
    display: none !important;
}

html {
    background: var(--color-bg);
}

body {
    max-width: 1040px;
    margin: 28px auto 56px;
    padding: 0 20px;
    color: var(--color-ink);
    font-family: var(--font-ui);
    line-height: 1.5;
}

h1,
h2,
h3,
.brand,
.word-title,
.entry-word {
    font-family: var(--font-display);
}

h1 {
    margin: 0 0 var(--space-lg);
    font-size: clamp(2.25rem, 5vw, 4rem);
    line-height: 1.05;
}

h2 {
    margin: var(--space-xl) 0 var(--space-sm);
    font-size: 1.35rem;
}

p {
    margin: 0 0 var(--space-md);
}

a {
    color: var(--color-accent);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

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

.site-header {
    margin-bottom: var(--space-xl);
    border-bottom: 1px solid var(--color-border);
}

.site-header-main {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr) 44px;
    align-items: center;
    min-height: 58px;
}

.brand {
    grid-column: 2;
    justify-self: center;
    color: var(--color-ink);
    font-family: var(--font-display);
    font-size: clamp(1.65rem, 4vw, 2.35rem);
    font-weight: 500;
    letter-spacing: 0;
    line-height: 1;
    text-decoration: none;
}

.site-nav {
    display: flex;
    justify-content: center;
    min-height: 42px;
    padding: 10px 0 14px;
    border-top: 1px solid var(--color-border);
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm) var(--space-lg);
    align-items: center;
}

.nav-links a {
    color: var(--color-ink);
    font-size: 0.95rem;
    text-decoration: none;
}

.nav-links a:hover {
    color: var(--color-accent-dark);
    text-decoration: underline;
}

.account-icon-button {
    grid-column: 3;
    justify-self: end;
    display: inline-grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    color: var(--color-ink);
    text-decoration: none;
}

.account-icon-button:hover {
    border-color: var(--color-border);
    background: var(--color-surface);
    color: var(--color-ink);
}

.account-icon-button span {
    display: block;
    background: currentColor;
}

.account-icon-head {
    width: 12px;
    height: 12px;
    margin-top: 4px;
    border-radius: 50%;
}

.account-icon-body {
    width: 22px;
    height: 10px;
    margin-top: 3px;
    border-radius: 12px 12px 3px 3px;
}

.inline-form {
    display: inline-flex;
    margin: 0;
}

label {
    display: inline-block;
    margin-bottom: var(--space-xs);
    font-weight: 650;
}

input:not([type="checkbox"]):not([type="radio"]),
textarea {
    width: 100%;
    max-width: 760px;
    min-height: 38px;
    padding: 10px 11px;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-ink);
    font: inherit;
}

textarea {
    min-height: 116px;
    resize: vertical;
}

input:focus,
textarea:focus {
    outline: 3px solid var(--color-accent-soft);
    border-color: var(--color-accent);
}

button,
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 38px;
    width: auto;
    padding: 6px 12px;
    margin: 0;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
    background: #f4f3ef;
    color: var(--color-ink);
    text-decoration: none;
    cursor: pointer;
    font: inherit;
    font-weight: 600;
}

button:hover,
.button:hover {
    border-color: var(--color-accent);
    color: var(--color-accent-dark);
}

.button-primary {
    border-color: var(--color-accent);
    background: var(--color-accent);
    color: #fff;
}

.button-primary:hover {
    background: var(--color-accent-dark);
    color: #fff;
}

.button-secondary {
    background: var(--color-surface);
}

.button-danger {
    border-color: #b98282;
    background: #fffafa;
    color: #7b2e2e;
}

.button-danger:hover {
    border-color: #8f3d3d;
    color: #6d2525;
}

.button-subtle {
    border-color: var(--color-border);
    background: transparent;
    color: var(--color-muted);
}

.button-compact {
    min-height: 34px;
    padding: 5px 10px;
    font-size: 0.95rem;
}

.button-small {
    min-height: 30px;
    padding: 4px 10px;
    font-size: 0.9rem;
}

.google-auth-button {
    min-height: 40px;
    border-color: #dadce0;
    background: #fff;
    color: #202124;
    font-weight: 600;
}

.google-auth-button:hover {
    border-color: #c5c8cc;
    background: #f8fafd;
    color: #202124;
}

.google-mark {
    display: inline-grid;
    place-items: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    color: #4285f4;
    font-family: var(--font-ui);
    font-size: 1rem;
    font-weight: 700;
}

.copy-status {
    min-width: 48px;
    font-size: 0.9rem;
}

.messages,
.status-line {
    padding: 10px 12px;
    margin-bottom: var(--space-lg);
    border: 1px solid var(--color-warning-border);
    border-radius: var(--radius);
    background: var(--color-warning-bg);
}

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

.page-header {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm) var(--space-lg);
    align-items: end;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.page-header h1 {
    margin-bottom: 0;
}

.result-count {
    margin-bottom: var(--space-xs);
    color: var(--color-muted);
    font-size: 0.95rem;
}

.filter-toggle {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 2px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: #f4f3ef;
}

.filter-toggle-button {
    min-height: 26px;
    padding: 3px 9px;
    border: 0;
    border-radius: calc(var(--radius) - 2px);
    background: transparent;
    color: var(--color-muted);
    font-family: var(--font-ui);
    font-size: 0.82rem;
    font-weight: 600;
    line-height: 1.2;
    cursor: pointer;
}

.filter-toggle-button:hover {
    background: #ffffff;
    color: var(--color-ink);
}

.filter-toggle-button.is-active {
    background: var(--color-surface);
    color: var(--color-accent-dark);
    box-shadow: 0 0 0 1px var(--color-border);
}

.filter-toggle-button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.filter-empty-message {
    margin-top: var(--space-md);
    color: var(--color-muted);
}

.account-header {
    max-width: 760px;
    margin: 0 auto var(--space-lg);
    text-align: center;
}

.account-layout {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-lg);
    max-width: 860px;
    margin: 0 auto;
}

.account-layout-single {
    grid-template-columns: minmax(0, 560px);
    justify-content: center;
}

.account-section {
    padding: var(--space-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
}

.account-section h1,
.account-section h2 {
    margin-top: 0;
}

.account-section h2 {
    margin-bottom: var(--space-md);
}

.account-note {
    color: var(--color-muted);
}

.account-actions {
    margin-top: var(--space-md);
}

.account-divider {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-md);
    align-items: center;
    margin: var(--space-lg) 0;
    color: var(--color-muted);
}

.account-divider::before,
.account-divider::after {
    content: "";
    height: 1px;
    background: var(--color-border);
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: end;
    margin-bottom: var(--space-xl);
}

.toolbar .field {
    flex: 1 1 280px;
    margin-bottom: 0;
}

.field {
    margin-bottom: var(--space-lg);
}

.vocabulary-toolbar {
    gap: var(--space-md);
    align-items: end;
}

.toolbar-search {
    flex: 1 1 360px;
    min-width: 0;
}

.toolbar-label {
    margin-bottom: var(--space-xs);
}

.toolbar-search-row {
    display: flex;
    gap: var(--space-sm);
    align-items: stretch;
}

.toolbar-search-row input {
    max-width: none;
    height: 38px;
    min-height: 38px;
    padding-top: 6px;
    padding-bottom: 6px;
}

.toolbar-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: center;
}

.vocabulary-toolbar .toolbar-actions .button-secondary {
    border-color: var(--color-border-strong);
    background: #f4f3ef;
}

.honeypot-field {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.field-wide {
    max-width: 760px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 var(--space-lg);
    max-width: 760px;
}

.ai-panel {
    max-width: 760px;
    margin: -4px 0 var(--space-lg);
    padding: var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: linear-gradient(135deg, #fff 0%, var(--color-accent-soft) 100%);
}

.ai-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: center;
}

.ai-status {
    display: block;
    min-height: 1.5em;
    margin-top: var(--space-sm);
}

.ai-generate-button {
    border-color: color-mix(in srgb, var(--color-accent) 70%, var(--color-border));
    background: #fff;
    color: var(--color-accent-dark);
}

.ai-generate-button:hover {
    background: var(--color-accent-soft);
    color: var(--color-accent-dark);
}

.ai-generate-button[aria-busy="true"] {
    opacity: 0.72;
    cursor: wait;
}

.ai-sparkle {
    color: var(--color-accent);
    font-size: 1.05rem;
    line-height: 1;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: center;
    margin-top: var(--space-lg);
}

.entry-list {
    border-top: 1px solid var(--color-border);
}

.entry-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--space-md);
    align-items: center;
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border);
}

.entry-main {
    min-width: 0;
}

.entry-heading {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: baseline;
    margin-bottom: var(--space-xs);
}

.entry-word {
    font-size: 1.35rem;
    font-weight: 700;
}

.entry-definition {
    max-width: 78ch;
    margin-bottom: 0;
    color: #303235;
}

.security-report-summary {
    margin-bottom: var(--space-md);
}

.security-report-row {
    align-items: start;
}

.security-vulnerability {
    max-width: 82ch;
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-border);
}

.security-vulnerability-heading {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: center;
    margin-bottom: var(--space-xs);
}

.meta-chip {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    padding: 2px 8px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: #f0efea;
    color: var(--color-muted);
    font-family: var(--font-ui);
    font-size: 0.88rem;
    font-weight: 650;
}

.detail-section {
    max-width: 780px;
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-border);
}

.detail-section h2 {
    margin-top: 0;
}

.practice-section-collapsed {
    padding: var(--space-md) 0;
}

.practice-toggle {
    min-height: 34px;
}

.practice-panel {
    max-width: 780px;
    margin-top: var(--space-md);
}

.practice-panel h2 {
    margin: 0 0 var(--space-sm);
    font-size: 1.2rem;
}

.practice-section textarea {
    max-width: 780px;
}

.practice-section .actions {
    margin-top: 0;
}

.selectable-row {
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr);
    gap: var(--space-md);
    align-items: start;
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border);
    cursor: pointer;
}

.selectable-row input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-top: 5px;
}

.training-footer {
    position: sticky;
    bottom: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-lg);
    padding: var(--space-md) 0;
    border-top: 1px solid var(--color-border);
    background: color-mix(in srgb, var(--color-bg) 94%, transparent);
}

.selected-count {
    color: var(--color-muted);
    font-weight: 650;
}

.question-row {
    margin: 0 0 var(--space-xl);
    padding: var(--space-lg) 0;
    border: 0;
    border-top: 1px solid var(--color-border);
}

.question-row legend {
    padding: 0 0 var(--space-md);
    font-size: 1.25rem;
}

.option-row {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr);
    gap: var(--space-sm);
    align-items: start;
    margin-bottom: var(--space-sm);
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    cursor: pointer;
}

.option-row input[type="radio"] {
    width: 17px;
    height: 17px;
    margin-top: 4px;
}

.option-row:has(input:checked) {
    border-color: var(--color-accent);
    background: var(--color-accent-soft);
}

.score-summary {
    display: inline-flex;
    flex-direction: column;
    min-width: 190px;
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
}

.score-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
}

.review-list {
    border-top: 1px solid var(--color-border);
}

.review-row {
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border);
}

.review-grid {
    display: grid;
    grid-template-columns: 90px minmax(0, 1fr);
    gap: var(--space-sm) var(--space-md);
    margin-top: var(--space-sm);
}

.review-label {
    color: var(--color-muted);
    font-weight: 700;
}

.success-message {
    max-width: 620px;
    padding: var(--space-md);
    border: 1px solid var(--color-success-border);
    border-radius: var(--radius);
    background: var(--color-success-bg);
}

@media (max-width: 720px) {
    body {
        margin-top: 18px;
        padding: 0 14px;
    }

    .site-header-main {
        grid-template-columns: 38px minmax(0, 1fr) 38px;
        min-height: 52px;
    }

    .brand {
        font-size: clamp(1.45rem, 8vw, 1.9rem);
    }

    .account-icon-button {
        width: 36px;
        height: 36px;
    }

    .site-nav {
        padding: 8px 0 12px;
    }

    .nav-links {
        gap: 6px 14px;
    }

    .form-grid,
    .account-layout,
    .entry-row,
    .review-grid {
        grid-template-columns: 1fr;
    }

    .entry-action {
        justify-self: start;
    }

    .toolbar {
        align-items: stretch;
    }

    .toolbar-search,
    .toolbar-actions,
    .toolbar-search-row {
        width: 100%;
    }

    .toolbar-search-row {
        flex-direction: column;
    }

    .toolbar-actions {
        align-items: stretch;
    }

    .toolbar button,
    .toolbar .button,
    .account-actions button,
    .account-actions .button,
    .account-actions .inline-form,
    .account-section .google-auth-button,
    .training-footer button,
    .training-footer .button {
        width: 100%;
    }

    .training-footer {
        align-items: stretch;
    }
}