html:root {
    --bg: #f7f2e7;
    --surface: #ffffff;
    --surface-2: #fbf7ee;
    --ink: #191726;
    --ink-soft: #5a5470;
    --ink-faint: #9089a3;
    --accent: #e0432b;
    --accent-2: #c23621;
    --accent-soft: rgba(224, 67, 43, 0.12);
    --gold: #b4870a;
    --gold-soft: rgba(239, 176, 0, 0.18);
    --line: #e7dec7;
    --line-strong: #d8cba8;

    --good: #2f9e58;
    --good-soft: #e6f4ea;
    --bad: #d64545;
    --bad-soft: #fbe9e9;

    --shadow-sm: 0 1px 2px rgba(25, 23, 38, 0.06), 0 1px 1px rgba(25, 23, 38, 0.04);
    --shadow-md: 0 10px 24px -8px rgba(25, 23, 38, 0.16), 0 2px 8px -2px rgba(25, 23, 38, 0.06);
    --shadow-lg: 0 0 0 1px rgba(25, 23, 38, 0.04), 0 16px 40px -16px rgba(224, 67, 43, 0.28);

    --ease: cubic-bezier(0.4, 0, 0.2, 1);

    --serif: "Futura", "Avenir Next", Avenir, "Century Gothic", system-ui, sans-serif;

    --color-nom: #1d5fa6; --color-nom-bg: #e5eef8;
    --color-acc: #e0432b; --color-acc-bg: #fbe7e3;
    --color-irr: #b4870a; --color-irr-bg: #faf1d6;
    --color-coo: #0f7168; --color-coo-bg: #e2f2f0;
    --color-sub: #6c4ba6; --color-sub-bg: #eee8f7;
    --color-neg: #b8355f; --color-neg-bg: #f8e5eb;

    --color-pro: #8a5a34; --color-pro-bg: #f2e6d8;
}

@media (prefers-color-scheme: dark) {
    html:root {
        --bg: #131220;
        --surface: #1c1a2c;
        --surface-2: #211f34;
        --ink: #f3eee1;
        --ink-soft: #b3abc9;
        --ink-faint: #867f9c;
        --accent: #ff5b41;
        --accent-2: #ff7b62;
        --accent-soft: rgba(255, 91, 65, 0.16);
        --gold: #ffcb3d;
        --gold-soft: rgba(255, 203, 61, 0.18);
        --line: #33304a;
        --line-strong: #413c5c;
        --good: #6bc98a;
        --good-soft: rgba(107, 201, 138, 0.14);
        --bad: #e58080;
        --bad-soft: rgba(229, 128, 128, 0.14);

        --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 10px 28px -10px rgba(0, 0, 0, 0.55);
        --shadow-lg: 0 0 0 1px rgba(255, 255, 255, 0.05), 0 16px 44px -16px rgba(255, 91, 65, 0.35);

        --color-nom: #5b98e8; --color-nom-bg: rgba(91, 152, 232, 0.16);
        --color-acc: #ff5b41; --color-acc-bg: rgba(255, 91, 65, 0.16);
        --color-irr: #ffcb3d; --color-irr-bg: rgba(255, 203, 61, 0.18);
        --color-coo: #2fb6a8; --color-coo-bg: rgba(47, 182, 168, 0.16);
        --color-sub: #9a7bd6; --color-sub-bg: rgba(154, 123, 214, 0.18);
        --color-neg: #e06a94; --color-neg-bg: rgba(224, 106, 148, 0.18);
        --color-pro: #c9945f; --color-pro-bg: rgba(201, 148, 95, 0.18);
    }
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 28px;
    background: color-mix(in srgb, var(--bg) 92%, transparent);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.brand-mark {
    width: 34px;
    height: 34px;
    flex: 0 0 auto;
}

.brand-word {
    font-family: var(--serif);
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: 0.01em;
    color: var(--ink);
}

.brand-word b {
    color: var(--accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
}

.nav-links > a {
    font-family: var(--mono);
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    text-decoration: none;
    padding: 9px 14px;
    border-radius: 8px;
    color: var(--ink-soft);
    transition: background 0.15s ease, color 0.15s ease;
}

.nav-links > a:hover {
    background: var(--surface-2);
    color: var(--ink);
}

.navbar .dropdown-item {
    position: relative;
}

.navbar .dropdown-trigger {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    font-family: var(--mono);
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 9px 14px;
    border-radius: 8px;
    color: var(--ink-soft);
    text-decoration: none;
    border: none;
    background: none;
    transition: background 0.15s ease, color 0.15s ease;
}

.navbar .dropdown-trigger:hover,
.navbar .dropdown-item.open .dropdown-trigger {
    background: var(--surface-2);
    color: var(--ink);
}

.navbar .dropdown-trigger.active {
    color: var(--accent);
}

.navbar .caret {
    transition: transform 0.18s ease;
    font-size: 0.7em;
}

.navbar .dropdown-item.open .caret {
    transform: rotate(180deg);
}

.navbar .dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    min-width: 230px;
    background: var(--surface);
    border: 1px solid color-mix(in srgb, var(--line) 60%, transparent);
    border-radius: 18px;
    box-shadow: var(--shadow-md);
    padding: 14px 10px 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px) scale(0.98);
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s;
    overflow: hidden;
}

.navbar .dropdown-menu::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--gold), var(--color-nom));
}

.navbar .dropdown-item.open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.navbar .dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 12px;
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--ink-soft);
    transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.navbar .dropdown-menu a:hover {
    background: var(--surface-2);
    color: var(--ink);
    transform: translateX(2px);
}

.dropdown-flag {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.15s ease;
}

.dropdown-flag-es {
    background: linear-gradient(to bottom, #c60b1e 0 25%, #ffc400 25% 75%, #c60b1e 75% 100%);
}

.dropdown-flag-fr {
    background: linear-gradient(to right, #0055a4 0 33.33%, #ffffff 33.33% 66.66%, #ef4135 66.66% 100%);
}

.navbar .dropdown-menu a:hover .dropdown-flag-es {
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1), 0 0 0 3px var(--color-acc-bg);
}

.navbar .dropdown-menu a:hover .dropdown-flag-fr {
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1), 0 0 0 3px var(--color-nom-bg);
}

.dropdown-lang-name {
    flex: 1;
}

.dropdown-soon-badge {
    font-family: var(--mono);
    font-size: 0.58rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--gold);
    background: var(--gold-soft);
    padding: 3px 7px;
    border-radius: 999px;
    flex-shrink: 0;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

@media (max-width: 860px) {
    .nav-links {
        position: fixed;
        inset: 60px 0 auto 0;
        background: var(--surface);
        flex-direction: column;
        align-items: stretch;
        padding: 10px;
        border-bottom: 1px solid var(--line);
        box-shadow: var(--shadow-md);
        transform: translateY(-8px);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
        gap: 2px;
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-links > a,
    .navbar .dropdown-trigger {
        width: 100%;
    }

    .navbar .dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        padding-left: 14px;
        margin-top: 0;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
    }

    .navbar .dropdown-menu::before {
        display: none;
    }

    .navbar .dropdown-item.open .dropdown-menu {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }
}

.cac-main {
    position: relative;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 94px 16px 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    height: 100vh;
    overflow: hidden;
}

.cac-main::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(640px 420px at 12% 6%, var(--accent-soft), transparent 60%),
        radial-gradient(560px 380px at 94% 16%, var(--gold-soft), transparent 60%);
    opacity: 0.7;
    pointer-events: none;
}

.cac-mode-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--mono);
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    color: var(--ink-soft);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 10px;
    padding: 8px 10px;
    cursor: pointer;
    transition: background 0.2s var(--ease), color 0.2s var(--ease), transform 0.15s var(--ease);
}

.cac-mode-btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 15px;
    height: 15px;
    color: inherit;
    flex-shrink: 0;
}

.cac-mode-btn:hover {
    background: var(--surface-2);
    color: var(--ink);
    transform: translateY(-1px);
}

.cac-mode-btn.is-active {
    background: var(--accent-soft);
    color: var(--accent);
}

.cac-mode-btn:active {
    transform: scale(0.97);
}

.cac-fn-progress-title.cac-mode-btn {
    padding: 0;
    border: none;
    border-radius: 0;
    background: none;
}

.cac-fn-progress-title.cac-mode-btn:hover,
.cac-fn-progress-title.cac-mode-btn.is-active {
    background: none;
    color: var(--ink);
    transform: none;
}

.cac-fn-page-back-btn {
    margin: -4px 0 14px -6px;
}

.cac-view {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    animation: cac-fade-in 0.2s var(--ease);
}

.cac-view[hidden] {
    display: none;
}

@keyframes cac-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

body.cac-intro-open {
    overflow: hidden;
}

.cac-intro-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    overflow: hidden;
    background: var(--bg);
    animation: cac-fade-in 0.3s var(--ease);
}

.cac-intro-overlay.is-closing {
    animation: cac-intro-overlay-out 0.3s var(--ease) forwards;
}

@keyframes cac-intro-overlay-out {
    from { opacity: 1; }
    to { opacity: 0; }
}

.cac-intro-eyebrow {
    position: absolute;
    top: 36px;
    left: 0;
    right: 0;
    text-align: center;
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--gold);
}

.cac-intro-step {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 90px 8vw 120px;
    text-align: center;
    opacity: 0;
    pointer-events: none;
    overflow-y: auto;
    transition: opacity 0.45s var(--ease);
}

.cac-intro-step.is-active {
    opacity: 1;
    pointer-events: auto;
}

.cac-intro-step > .topic-chip {
    margin-bottom: 14px;
}

.cac-intro-step h2 {
    font-family: var(--serif);
    font-size: clamp(1.7rem, 3.6vw, 2.4rem);
    font-weight: 800;
    color: var(--ink);
    margin: 0 0 18px;
}

.cac-intro-lede {
    max-width: 560px;
    font-size: 1.02rem;
    line-height: 1.7;
    color: var(--ink-soft);
    text-align: left;
    margin: 0 0 22px;
}

.cac-intro-lede em {
    color: var(--ink);
    font-style: normal;
    font-weight: 600;
}

.cac-intro-example-de {
    width: 100%;
    max-width: 560px;
    font-family: var(--serif);
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--ink);
    text-align: left;
    margin: 0;
}

.cac-intro-example-en {
    width: 100%;
    max-width: 560px;
    font-size: 0.85rem;
    color: var(--ink-faint);
    font-style: italic;
    text-align: left;
    margin: 4px 0 20px;
}

.cac-intro-callout {
    width: 100%;
    max-width: 560px;
    border: 1.5px solid var(--color-coo);
    border-radius: 12px;
    padding: 14px 16px;
    text-align: left;
}

.cac-intro-callout p {
    margin: 0;
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--ink-soft);
}

.cac-intro-callout strong {
    color: var(--ink);
}

.cac-intro-table-wrap {
    width: 100%;
    max-width: 420px;
    border-radius: 12px;
    border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.cac-intro-fn-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    width: 100%;
    max-width: 900px;
}

.cac-intro-step[data-intro-step="1"] .cac-intro-fn-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    max-width: 1180px;
}

.cac-intro-fn-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    background: var(--surface);
    border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
    border-radius: 16px;
    padding: 14px 16px;
    box-shadow: var(--shadow-sm);
    opacity: 0;
    transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), border-color 0.2s var(--ease);
}

.cac-intro-fn-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-nom);
}

.cac-intro-fn-card > .cac-fn-num {
    display: inline-block;
    margin-bottom: 8px;
}

.cac-intro-fn-card h3 {
    font-family: var(--serif);
    font-size: 0.94rem;
    font-weight: 700;
    color: var(--ink);
    margin: 0 0 6px;
    line-height: 1.25;
}

.cac-intro-fn-rule {
    font-size: 0.76rem;
    line-height: 1.45;
    color: var(--ink-soft);
    margin: 0 0 10px;
}

.cac-intro-fn-rule em {
    color: var(--ink);
    font-style: normal;
    font-weight: 600;
}

.cac-intro-fn-example {
    font-family: var(--serif);
    font-size: 0.86rem;
    color: var(--ink);
    margin: auto 0 2px;
}

.cac-intro-fn-gloss {
    font-size: 0.72rem;
    font-style: italic;
    color: var(--ink-faint);
    margin: 0;
}

.cac-intro-step.is-active .cac-intro-fn-card {
    animation: cac-intro-fn-in 0.5s var(--ease) both;
}

.cac-intro-step.is-active .cac-intro-fn-card:nth-child(1) { animation-delay: 0.05s; }
.cac-intro-step.is-active .cac-intro-fn-card:nth-child(2) { animation-delay: 0.12s; }
.cac-intro-step.is-active .cac-intro-fn-card:nth-child(3) { animation-delay: 0.19s; }
.cac-intro-step.is-active .cac-intro-fn-card:nth-child(4) { animation-delay: 0.26s; }
.cac-intro-step.is-active .cac-intro-fn-card:nth-child(5) { animation-delay: 0.33s; }
.cac-intro-step.is-active .cac-intro-fn-card:nth-child(6) { animation-delay: 0.4s; }
.cac-intro-step.is-active .cac-intro-fn-card:nth-child(7) { animation-delay: 0.47s; }

@keyframes cac-intro-fn-in {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 700px) {
    .cac-intro-fn-grid,
    .cac-intro-step[data-intro-step="1"] .cac-intro-fn-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.cac-intro-controls {
    position: absolute;
    bottom: 44px;
    left: 0;
    right: 0;
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.cac-intro-progress {
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--ink-faint);
    font-variant-numeric: tabular-nums;
}

.cac-intro-next-btn,
.cac-intro-start-btn {
    font-family: var(--mono);
    font-size: 0.76rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: #ffffff;
    background: var(--accent);
    border: none;
    border-radius: 999px;
    padding: 12px 26px;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), opacity 0.2s var(--ease);
}

.cac-intro-next-btn:hover,
.cac-intro-start-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.cac-intro-next-btn:active,
.cac-intro-start-btn:active {
    transform: translateY(0) scale(0.97);
}

.cac-intro-next-btn[hidden],
.cac-intro-start-btn[hidden] {
    display: none;
}

.cac-intro-start-btn {
    animation: cac-intro-pop-in 0.3s var(--ease);
}

@keyframes cac-intro-pop-in {
    from { opacity: 0; transform: scale(0.85); }
    to { opacity: 1; transform: scale(1); }
}

@media (max-width: 560px) {
    .cac-intro-step {
        padding: 80px 6vw 130px;
    }
}

.cac-grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(170px, 220px) minmax(200px, 1fr) minmax(230px, 300px);

    grid-template-rows: 1fr;
    gap: 20px;
    height: 100%;
    min-height: 0;
    background: var(--surface);
    border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
    border-radius: 24px;
    padding: 28px;
    box-shadow: var(--shadow-md);
}

.cac-story,
.cac-sidebar-right {
    min-height: 0;
    overflow-y: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.cac-story::-webkit-scrollbar,
.cac-sidebar-right::-webkit-scrollbar {
    display: none;
}

.cac-sidebar-left { grid-column: 1; grid-row: 1; }
.cac-story { grid-column: 2; grid-row: 1; }
.cac-sidebar-right { grid-column: 3; grid-row: 1; }

.cac-guide-toggle-btn {
    display: inline-flex;
    align-items: center;
    margin-left: 8px;
    font-family: var(--mono);
    font-size: 0.62rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--ink-soft);
    background: var(--surface-2);
    border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
    border-radius: 999px;
    padding: 3px 10px;
    cursor: pointer;
    transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.cac-guide-toggle-btn:hover {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: var(--accent);
}

.cac-guide-toggle-btn[hidden] {
    display: none;
}

.cac-sidebar-right.is-expanded {

    grid-column: 1 / -1;
    grid-row: 1;
    position: absolute;
    top: 0;
    left: var(--cac-guide-expanded-left, 220px);
    right: 0;
    bottom: 0;
    z-index: 30;
    overflow-y: auto;
    background: var(--surface);
    border: 1px solid color-mix(in srgb, var(--line) 60%, transparent);
    border-radius: 18px;
    box-shadow: var(--shadow-lg);
    padding: 22px 24px;
    animation: cac-fade-in 0.2s var(--ease);
}

.cac-sidebar-left {
    border-right: 1px solid var(--line);
    padding-right: 24px;
    min-height: 0;
    overflow-y: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.cac-sidebar-left::-webkit-scrollbar {
    display: none;
}

.cac-sidebar-left h2 {
    font-family: var(--mono);
    font-size: 0.64rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--gold);
    text-transform: uppercase;
    text-align: center;
    margin: 0 0 10px;
}

.cac-sidebar-left .topic {
    cursor: pointer;
}

.cac-topic-category {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.cac-topic-fn-boxes {
    list-style: none;
    margin: 0;
    padding: 0 0 0 10px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.cac-topic-fn-box {
    --fn-accent: var(--color-nom);
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 1px;
    padding: 7px 10px;
    border-radius: 9px;
    background: color-mix(in srgb, var(--fn-accent) 7%, var(--surface));
    border-left: 2.5px solid color-mix(in srgb, var(--fn-accent) 45%, transparent);
    cursor: pointer;
    transition: background 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.15s var(--ease), transform 0.15s var(--ease);
}

.cac-topic-fn-box:hover {
    transform: translateX(2px);
    box-shadow: var(--shadow-sm);
}

.cac-topic-fn-box-num {
    font-family: var(--mono);
    font-size: 0.56rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--fn-accent);
    transition: color 0.2s var(--ease);
}

.cac-topic-fn-box-title {
    font-size: 0.76rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--ink-soft);
    transition: color 0.2s var(--ease);
}

.cac-topic-fn-box-coo { --fn-accent: var(--color-coo); }
.cac-topic-fn-box-sub { --fn-accent: var(--color-sub); }
.cac-topic-fn-box-irr { --fn-accent: var(--color-irr); }
.cac-topic-fn-box-acc { --fn-accent: var(--color-acc); }
.cac-topic-fn-box-neg { --fn-accent: var(--color-neg); }

.topic-color-pro { background: var(--color-pro-bg) !important; }
.topic-color-pro strong { color: var(--color-pro) !important; }

.cac-topic-fn-box.is-active {
    background: var(--fn-accent);
    border-left-color: var(--fn-accent);
    box-shadow: var(--shadow-md);
}

.cac-topic-fn-box.is-active .cac-topic-fn-box-num,
.cac-topic-fn-box.is-active .cac-topic-fn-box-title {
    color: #ffffff;
}

.cac-topic-fn-box.is-done::after {
    content: "\2713";
    position: absolute;
    top: 6px;
    right: 8px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--good);
    color: #ffffff;
    font-size: 0.6rem;
    font-weight: 700;
    line-height: 14px;
    text-align: center;
}

.cac-topic-fn-box.is-locked {
    opacity: 0.45;
    cursor: not-allowed;
    filter: grayscale(35%);
}

.cac-topic-fn-box.is-locked:hover {
    transform: none;
    box-shadow: none;
}

.cac-topic-fn-box.is-locked .cac-topic-fn-box-num::after {
    content: "\1F512";
    margin-left: 4px;
    font-size: 0.85em;
}

.cac-topic-fn-box.is-denied {
    animation: cacFnBoxDenied 0.35s var(--ease);
}

@keyframes cacFnBoxDenied {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
}

.cac-topic-fn-signifier {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px 10px;
    border-radius: 9px;
    border: 1px dashed color-mix(in srgb, var(--gold) 50%, var(--line));
    transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.cac-topic-fn-signifier-label {
    font-family: var(--mono);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--gold);
}

.cac-topic-fn-signifier.is-active {
    background: var(--gold-soft);
    border-style: solid;
    border-color: var(--gold);
}

.cac-topic-fn-signifier-split {
    padding: 4px;
    gap: 4px;
}

.cac-topic-fn-signifier-half {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2px 0;
    border-radius: 6px;
    transition: background 0.2s var(--ease);
}

.cac-topic-fn-signifier-half.is-active {
    background: var(--gold-soft);
}

.cac-topic-fn-signifier-half.is-active .cac-topic-fn-signifier-label {
    color: var(--gold);
}

.cac-topic-fn-signifier-divider {
    width: 1px;
    align-self: stretch;
    background: color-mix(in srgb, var(--gold) 35%, var(--line));
}

.cac-guide > .cac-fn-num {
    display: inline-block;
    margin-bottom: 10px;
}

.cac-sidebar-hint {
    margin: 10px 0;
    font-size: 0.7rem;
    color: var(--ink-faint);
    font-style: italic;
}

.cac-story {
    border-right: 1px solid var(--line);
    padding-right: 24px;
}

.cac-sentence {
    position: relative;
}

.cac-text-subview[data-text-subview="reading"].cac-selecting .cac-sentence {
    filter: blur(4px);
    opacity: 0.4;
    transition: filter 0.2s ease, opacity 0.2s ease;
}

.cac-text-subview[data-text-subview="reading"].cac-selecting .cac-sentence.cac-select-active {
    filter: none;
    opacity: 1;
}

.cac-select-popup[hidden] {
    display: none;
}

.cac-select-popup {
    position: absolute;
    z-index: 20;
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-width: calc(100% - 8px);
    padding: 12px 16px;
    border-radius: 14px;
    background: var(--surface);
    border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
    box-shadow: var(--shadow-md);
    filter: none;
    animation: cac-fade-in 0.15s var(--ease);
}

.cac-select-popup-label {
    font-family: var(--mono);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ink-faint);
}

.cac-select-popup-text {
    font-family: var(--serif);
    font-size: 0.94rem;
    line-height: 1.5;
    color: var(--ink);
}

.cac-fn-progress {
    padding: 2px 2px 20px;
    margin-bottom: 6px;
}

.cac-fn-progress-top {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 12px;
}

.cac-fn-progress-title {
    font-family: var(--mono);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--ink-faint);
}

.cac-fn-progress-count {
    font-size: 0.74rem;
    font-weight: 600;
    color: var(--ink-soft);
    text-align: right;
    transition: color 0.2s var(--ease);
}

.cac-fn-progress-track {
    position: relative;
    height: 3px;
    margin: 0 6px;
    border-radius: 999px;
    background: var(--line);
}

.cac-fn-progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.cac-fn-progress-tick {
    position: absolute;
    top: 0;
    width: 2px;
    height: 100%;
    background: var(--bg);
    transform: translateX(-50%);
    pointer-events: none;
    z-index: 1;
}

.cac-fn-progress-thumb {
    position: absolute;
    top: 50%;
    left: 0%;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent);
    transform: translate(-50%, -50%);
    transition: left 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 2;
}

.cac-fn-progress-gate {
    position: absolute;
    top: 100%;
    margin-top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--surface);
    border: 1.5px solid var(--ink-faint);
    transform: translateX(-50%);
    transition: background 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.cac-fn-progress-gate.is-current {
    border-color: var(--gold);
}

.cac-fn-progress-gate.is-cleared {
    background: var(--good);
    border-color: var(--good);
}

.cac-fn-progress-gate.is-current:not(.is-cleared) {
    animation: cac-fn-progress-pulse 1.6s ease-in-out infinite;
}

@keyframes cac-fn-progress-pulse {
    0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--gold) 45%, transparent); }
    50% { box-shadow: 0 0 0 5px color-mix(in srgb, var(--gold) 0%, transparent); }
}

.cac-sb-page {
    animation: cac-fade-in 0.2s var(--ease);
}

.cac-story-placeholder-view {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    min-height: 200px;
}

.cac-story-placeholder-view[hidden] {
    display: none;
}

.cac-story-placeholder-text {
    font-family: var(--serif);
    font-size: 1rem;
    font-style: italic;
    color: var(--ink-faint);
    margin: 0;
}

.cac-text-subview[data-text-subview="function-cycle-test"] {
    display: flex;
    flex-direction: column;
}

.cac-text-subview[hidden] {
    display: none;
}

.cac-checkpoint-cta {
    margin-top: 18px;
}

.cac-fnstage-card {
    background: var(--surface);
    border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    padding: 24px 26px;
}

.cac-fnstage-note {
    font-size: 0.88rem;
    line-height: 1.6;
    color: var(--ink-soft);
    margin: 6px 0 0;
}

.cac-fnstage-card > .cac-fn-num,
.cac-fn1-card > .cac-fn-num {
    display: inline-block;
    margin-bottom: 10px;
}

.cac-fnstage-card h3,
.cac-fn1-card h3 {
    font-family: var(--serif);
    font-size: 1.08rem;
    font-weight: 700;
    color: var(--ink);
    margin: 0;
}

.cac-fn1-card {
    background: var(--surface);
    border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    padding: 24px 26px;
}

.cac-fn1-intro-text {
    font-size: 0.9rem;
    line-height: 1.65;
    color: var(--ink-soft);
    margin: 10px 0 0;
}

.cac-fn1-step-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 12px;
}

.cac-fn1-step-label {
    font-family: var(--mono);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--ink-faint);
}

.cac-fn1-step-count {
    font-size: 0.74rem;
    font-weight: 600;
    color: var(--ink-soft);
}

.cac-fn1-progress-track {
    position: relative;
    height: 3px;
    margin: 0 5px 16px;
    border-radius: 999px;
    background: var(--line);
}

.cac-fn1-progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.cac-fn1-progress-thumb {
    position: absolute;
    top: 50%;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent);
    transform: translate(-50%, -50%);
    transition: left 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.cac-fn1-begin-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--mono);
    font-size: 0.64rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 7px 14px;
    border-radius: 999px;
    border: none;
    color: var(--accent);
    background: var(--accent-soft);
    cursor: pointer;
    margin-top: 20px;
    transition: background 0.2s var(--ease), color 0.2s var(--ease), transform 0.15s var(--ease);
}

.cac-fn1-begin-btn:hover {
    background: var(--accent);
    color: #ffffff;
}

.cac-fn1-begin-btn:active {
    transform: scale(0.96);
}

.cac-fn1-begin-btn-arrow {
    display: inline-flex;
    transition: transform 0.2s var(--ease);
}

.cac-fn1-begin-btn:hover .cac-fn1-begin-btn-arrow {
    transform: translateX(3px);
}

.cac-fn1-answer-hint {
    font-family: var(--mono);
    font-size: 0.66rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ink-faint);
    margin: 0 0 14px;
}

.cac-fn1-answer-hint strong {
    color: var(--accent);
}

.cac-fn1-feed {
    font-family: var(--serif);
    font-size: 1.1rem;
    line-height: 1.9;
    color: var(--ink);
    margin: 0;
}

.cac-fn1-gloss {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px dashed var(--line-strong);
    font-family: var(--serif);
    font-style: italic;
    font-size: 0.88rem;
    color: var(--ink-faint);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.cac-fn1-gloss.is-visible {
    opacity: 1;
}

.cac-fn1-blank-wrap {
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
}

.cac-fn1-blank-input {
    width: 8ch;
    min-width: 8ch;
    font-family: var(--serif);
    font-size: 1.1rem;
    color: var(--ink);
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--accent);
    text-align: center;
    padding: 0 4px 4px;
    outline: none;
}

.cac-fn1-blank-input:disabled {
    color: inherit;
    opacity: 1;
}

.cac-fn1-blank-input.is-correct {
    border-bottom-color: var(--good);
    color: var(--good);
    font-weight: 700;
}

.cac-fn1-blank-input.is-wrong {
    border-bottom-color: var(--bad);
    color: var(--bad);
    font-weight: 700;
}

.cac-fn1-blank-input.is-skipped {
    border-bottom-color: var(--gold);
    color: var(--gold);
    font-weight: 700;
}

.cac-fn1-blank-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 999px;
    border: none;
    background: var(--accent-soft);
    color: var(--accent);
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.15s ease, color 0.15s ease, transform 0.1s ease;
}

.cac-fn1-blank-submit:hover {
    background: var(--accent);
    color: #ffffff;
}

.cac-fn1-blank-submit:disabled {
    display: none;
}

.cac-fn1-blank-skip {
    font-family: var(--mono);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border: none;
    border-radius: 999px;
    padding: 4px 8px;
    background: var(--surface-2);
    color: var(--ink-faint);
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.15s ease, color 0.15s ease;
}

.cac-fn1-blank-skip:hover {
    background: var(--gold-soft);
    color: var(--gold);
}

.cac-fn1-blank-skip:disabled {
    display: none;
}

.cac-fn1-blank-correction {
    font-family: var(--mono);
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--bad);
    background: var(--bad-soft);
    padding: 2px 8px;
    border-radius: 999px;
    white-space: nowrap;
}

.cac-fn1-dissect-sentence {
    font-family: var(--serif);
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--ink);
    margin: 0 0 6px;
}

.cac-fn1-dissect-target {
    background: var(--color-nom-bg);
    color: var(--color-nom);
    border-radius: 4px;
    font-weight: 700;
}

.cac-fn1-dissect-question {
    font-size: 0.86rem;
    color: var(--ink-soft);
    margin: 0 0 14px;
}

.cac-fn1-dissect-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 4px;
}

.hl-base.cac-spot-target[data-function-topic] {
    color: var(--color-nom);
    font-weight: 700;
    border-bottom: 1.5px dashed var(--color-nom);
    cursor: pointer;
    transition: opacity 0.15s var(--ease);
}

.hl-base.cac-spot-target[data-function-topic]:hover {
    opacity: 0.7;
}

.cac-spot-chips {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin: 6px 0 18px;
}

.cac-spot-chip {
    font-family: var(--serif);
    font-size: 1.05rem;
    font-weight: 700;
    padding: 8px 18px;
    border-radius: 100px;
    border: 1.5px solid var(--color-nom);
    background: var(--color-nom-bg);
    color: var(--color-nom);
    cursor: pointer;
    transition: transform 0.15s var(--ease);
}

.cac-spot-chip:hover {
    transform: translateY(-1px);
}

.cac-spot-chip.is-viewed {
    background: var(--surface);
}

.cac-spot-meaning {
    display: none;
}

.cac-spot-meaning.is-visible {
    display: block;
}

.cac-spot-final-hint {
    font-size: 0.72rem;
    color: var(--ink-faint);
    font-style: italic;
    margin: 0 0 8px;
}

.cac-fn1-summary-line {
    font-size: 0.92rem;
    color: var(--ink-soft);
    margin: 8px 0 0;
}

.cac-fn1-summary-line:first-of-type {
    margin-top: 12px;
}

.cac-sb-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 4px 0 16px;
}

.cac-sb-chip {
    font-family: var(--serif);
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--ink-soft);
    background: var(--surface-2);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 5px 13px;
}

.cac-sb-input-row {
    display: flex;
    gap: 8px;
}

.cac-sb-input {
    flex: 1;
    min-width: 0;
    font-family: var(--serif);
    font-size: 0.92rem;
    color: var(--ink);
    background: var(--surface);
    border: 1.5px solid var(--line-strong);
    border-radius: 12px;
    padding: 10px 14px;
    transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.cac-sb-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-soft);
}

.cac-sb-input:disabled {
    opacity: 0.7;
}

.cac-sb-check-btn {
    font-family: var(--mono);
    font-size: 0.64rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent);
    background: var(--accent-soft);
    border: none;
    border-radius: 12px;
    padding: 0 16px;
    cursor: pointer;
    transition: background 0.2s var(--ease), color 0.2s var(--ease), transform 0.15s var(--ease);
}

.cac-sb-check-btn:hover:not(:disabled) {
    background: var(--accent);
    color: #ffffff;
}

.cac-sb-check-btn:active:not(:disabled) {
    transform: scale(0.96);
}

.cac-sb-check-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.cac-sb-feedback {
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 700;
    margin: 10px 0 0;
    min-height: 1em;
}

.cac-sb-feedback.is-correct {
    color: var(--good);
}

.cac-sb-feedback.is-wrong {
    color: var(--bad);
}

.cac-sb-done {
    padding: 20px 0;
    text-align: center;
    font-family: var(--serif);
    font-size: 0.95rem;
    color: var(--ink-soft);
}

.cac-vq-page {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.cac-vq-page[hidden] {
    display: none;
}

.cac-vq-card {
    background: var(--surface);
    border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    padding: 24px 26px;
}

.cac-vq-topbar {
    margin-bottom: 16px;
}

.cac-vq-eyebrow {
    display: inline-block;
    font-family: var(--mono);
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--gold);
    margin-bottom: 6px;
}

.cac-vq-progress-track {
    height: 5px;
    background: var(--line);
    border-radius: 999px;
    overflow: hidden;
}

.cac-vq-progress-fill {
    height: 100%;
    background: var(--accent);
    width: 0%;
    transition: width 0.25s var(--ease);
}

.cac-vq-sentence {
    font-family: var(--serif);
    font-weight: 500;
    font-size: 1.15rem;
    line-height: 1.6;
    color: var(--ink);
    margin: 0 0 6px;
}

.cac-vq-blank {
    display: inline-block;
    min-width: 4em;
    border-bottom: 2px solid var(--accent);
}

.cac-vq-english {
    color: var(--ink-soft);
    font-size: 0.86rem;
    font-style: italic;
    margin: 0 0 18px;
}

.cac-vq-mc {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 14px;
}

.cac-vq-mc[hidden] {
    display: none;
}

.cac-vq-mc-option {
    font-family: var(--sans, var(--serif));
    font-size: 0.9rem;
    padding: 11px 14px;
    border-radius: 12px;
    border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
    background: var(--surface-2);
    color: var(--ink);
    text-align: left;
    cursor: pointer;
    transition: border-color 0.15s var(--ease), background 0.15s var(--ease);
}

.cac-vq-mc-option:hover:not(:disabled) {
    border-color: var(--accent);
}

.cac-vq-mc-option.is-selected {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
    font-weight: 700;
}

.cac-vq-mc-option.cac-vq-correct {
    background: var(--good-soft);
    border-color: var(--good);
    color: var(--good);
    font-weight: 700;
}

.cac-vq-mc-option.cac-vq-incorrect {
    background: var(--bad-soft);
    border-color: var(--bad);
    color: var(--bad);
}

.cac-vq-mc-option.cac-vq-missed {
    background: var(--gold-soft);
    border-color: var(--gold);
    color: var(--gold);
    font-weight: 700;
}

.cac-vq-mc-option:disabled {
    cursor: default;
}

.cac-vq-typed {
    display: flex;
    gap: 8px;
    margin-bottom: 14px;
}

.cac-vq-typed[hidden] {
    display: none;
}

.cac-vq-text-input {
    flex: 1;
    min-width: 0;
    font-family: var(--serif);
    font-size: 0.95rem;
    padding: 10px 16px;
    border-radius: 999px;
    border: 1.5px solid var(--line-strong);
    background: var(--surface);
    color: var(--ink);
    outline: none;
    transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.cac-vq-text-input::placeholder {
    color: var(--ink-faint);
}

.cac-vq-text-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-soft);
}

.cac-vq-text-input:disabled {
    opacity: 0.7;
}

.cac-vq-rebuild[hidden] {
    display: none;
}

.cac-vq-rebuild-answer {
    font-family: var(--mono);
    font-weight: 700;
    font-size: 1.3rem;
    min-height: 2em;
    padding: 8px 14px;
    border: 1px dashed var(--line-strong);
    border-radius: 12px;
    background: var(--surface-2);
    color: var(--accent);
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.cac-vq-rebuild-tiles {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.cac-vq-tile {
    font-family: var(--mono);
    font-size: 1.05rem;
    font-weight: 700;
    width: 2.4rem;
    height: 2.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-soft);
    color: var(--accent);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: opacity 0.15s var(--ease), transform 0.15s var(--ease);
}

.cac-vq-tile:hover:not(:disabled) {
    transform: translateY(-2px);
}

.cac-vq-tile:disabled {
    opacity: 0.25;
    cursor: default;
}

.cac-vq-rebuild-actions {
    display: flex;
    margin-bottom: 14px;
}

.cac-vq-feedback {
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 0.86rem;
    line-height: 1.5;
    margin: 0 0 14px;
}

.cac-vq-feedback[hidden] {
    display: none;
}

.cac-vq-feedback-good {
    background: var(--good-soft);
    color: var(--good);
}

.cac-vq-feedback-bad {
    background: var(--bad-soft);
    color: var(--bad);
}

.cac-vq-feedback strong {
    font-family: var(--serif);
}

.cac-vq-btn {
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    padding: 11px 20px;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s var(--ease), transform 0.15s var(--ease), opacity 0.2s var(--ease);
}

.cac-vq-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.cac-vq-btn-primary {
    background: var(--accent);
    color: #ffffff;
}

.cac-vq-btn-primary:not(:disabled):hover {
    background: var(--accent-2);
}

.cac-vq-btn-primary:not(:disabled):active {
    transform: scale(0.97);
}

.cac-vq-btn-ghost {
    background: var(--surface-2);
    color: var(--ink-soft);
    border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}

.cac-vq-btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.cac-vq-continue-btn {
    width: 100%;
}

.cac-vq-continue-btn[hidden] {
    display: none;
}

.cac-vq-summary {
    text-align: center;
}

.cac-vq-score-hero {
    text-align: center;
    background: var(--accent-soft);
    border-radius: 16px;
    padding: 24px 16px;
    margin: 14px 0 20px;
}

.cac-vq-score-number {
    display: block;
    font-family: var(--serif);
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--accent);
}

.cac-vq-score-caption {
    display: block;
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--ink-soft);
    margin-top: 6px;
}

.cac-vq-score-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.86rem;
    text-align: left;
}

.cac-vq-score-table th,
.cac-vq-score-table td {
    text-align: left;
    padding: 8px 6px;
    border-bottom: 1px solid var(--line);
}

.cac-vq-score-table th {
    font-family: var(--mono);
    text-transform: uppercase;
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--ink-faint);
}

.cac-vq-word-cell {
    font-family: var(--serif);
    font-weight: 600;
    color: var(--accent);
}

.cac-vq-pip {
    display: inline-block;
    width: 0.6rem;
    height: 0.6rem;
    border-radius: 999px;
}

.cac-vq-pip-good { background: var(--good); }
.cac-vq-pip-bad { background: var(--bad); }

.cac-story h4 {
    font-family: var(--serif);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--ink);
    margin: 10px 0 12px;
}

.cac-story-text {
    font-family: var(--serif);
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--ink);
    line-height: 1.8;
    margin: 0 0 12px;
}

.cac-story-translation {
    font-size: 0.82rem;
    font-style: italic;
    color: var(--ink-faint);
    margin: 0;
}

.cac-story-vocab-word {
    color: var(--ink);
    font-weight: 800;
    border-bottom: 1px dotted var(--ink-faint);
}

.hl-base[data-function-topic] {
    display: inline;
    padding: 0;
    border-radius: 4px;
    font-weight: inherit;
    background-color: transparent;
    color: inherit;
    transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.hl-base.active[data-function-topic] {
    background-color: var(--color-nom-bg);
    color: var(--color-nom);
    box-shadow: none;
}

.hl-base.active[data-function-topic="function-2"][data-desirability="good"] {
    background-color: var(--good-soft);
    color: var(--good);
}

.hl-base.active[data-function-topic="function-2"][data-desirability="bad"] {
    background-color: var(--bad-soft);
    color: var(--bad);
}

.hl-base.active[data-function-topic="function-2"] {
    position: relative;
}

.hl-base.active[data-function-topic="function-2"][data-subfunction]::before {
    content: attr(data-subfunction);
    position: absolute;
    left: 50%;
    bottom: 100%;
    transform: translateX(-50%);
    font-family: var(--mono);
    font-size: 0.55rem;
    font-weight: 700;
    line-height: 1;
    color: inherit;
    white-space: nowrap;
    pointer-events: none;
}

.hl-base.active[data-function-topic="function-2"][data-subfunction~="8"] {
    cursor: help;
}

.hl-base.active[data-function-topic="function-7"] {
    position: relative;
}

.hl-base.active[data-function-topic="function-7"][data-subfunction]::before {
    content: attr(data-subfunction);
    position: absolute;
    left: 50%;
    bottom: 100%;
    transform: translateX(-50%);
    font-family: var(--mono);
    font-size: 0.55rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-irr);
    white-space: nowrap;
    pointer-events: none;
}

.hl-base.active[data-function-topic="function-5"] {
    position: relative;
}

.hl-base.active[data-function-topic="function-5"][data-gender]::before {
    content: attr(data-gender);
    position: absolute;
    left: 50%;
    bottom: 100%;
    transform: translateX(-50%);
    font-family: var(--mono);
    font-size: 0.55rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-nom);
    white-space: nowrap;
    pointer-events: none;
}

.hl-base.active[data-function-topic="conj-coordinating"] {
    background-color: var(--color-coo-bg);
    color: var(--color-coo);
}

.hl-base.active[data-function-topic="conj-subordinating"] {
    background-color: var(--color-sub-bg);
    color: var(--color-sub);
}

.hl-base.active[data-function-topic="function-6"],
.hl-base.active[data-function-topic="function-7"],
.hl-base.active[data-function-topic="adverbs"],
.hl-base.active[data-function-topic="verbs-to-know"] {
    background-color: var(--color-irr-bg);
    color: var(--color-irr);
}

.hl-base.active[data-function-topic="acc-adj-desirable"],
.hl-base.active[data-function-topic="acc-adj-neutral"],
.hl-base.active[data-function-topic="acc-pronouns"],
.hl-base.active[data-function-topic="acc-nouns"] {
    background-color: var(--color-acc-bg);
    color: var(--color-acc);
}

.hl-base.active[data-function-topic="neg-kein"],
.hl-base.active[data-function-topic="neg-nicht"] {
    background-color: var(--color-neg-bg);
    color: var(--color-neg);
}

.cac-fn-num-coo { color: var(--color-coo); background: var(--color-coo-bg); }
.cac-fn-num-sub { color: var(--color-sub); background: var(--color-sub-bg); }
.cac-fn-num-irr { color: var(--color-irr); background: var(--color-irr-bg); }
.cac-fn-num-neg { color: var(--color-neg); background: var(--color-neg-bg); }
.cac-fn-num-acc { color: var(--color-acc); background: var(--color-acc-bg); }

.topic-chip-pro { background: var(--color-pro-bg); color: var(--color-pro); }

.cac-story-pager {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-top: 8px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
}

.cac-story-pager-btn {
    font-family: var(--mono);
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--ink-soft);
    background: var(--surface-2);
    border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
    border-radius: 999px;
    padding: 8px 14px;
    cursor: pointer;
    transition: background 0.2s var(--ease), color 0.2s var(--ease), transform 0.15s var(--ease), box-shadow 0.2s var(--ease);
}

.cac-story-pager-btn:hover:not(:disabled) {
    background: var(--accent-soft);
    color: var(--accent);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.cac-story-pager-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.cac-story-pager-status {
    font-family: var(--mono);
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--ink-faint);
    font-variant-numeric: tabular-nums;
}

.cac-sidebar-right {
    min-width: 0;

    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
}

.cac-guide-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    height: 100%;
    min-height: 200px;
    text-align: center;
    padding: 20px 10px;
}

.cac-guide-placeholder[hidden] {
    display: none;
}

.cac-guide-placeholder-icon {
    font-size: 1.4rem;
    color: var(--ink-faint);
}

.cac-guide {
    animation: cac-guide-in 0.15s ease;
}

@keyframes cac-guide-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

.cac-guide > .topic-chip {
    margin-bottom: 10px;
}

.cac-guide h3 {
    font-family: var(--serif);
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--ink);
    margin: 0 0 10px;
}

.cac-guide-rule {
    font-size: 0.84rem;
    line-height: 1.6;
    color: var(--ink-soft);
    margin: 0 0 16px;
}

.cac-guide-rule em,
.cac-guide-callout em {
    color: var(--ink);
    font-style: normal;
    font-weight: 600;
}

.cac-guide-table-wrap {
    margin: 0 0 16px;
    border-radius: 12px;
    border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
    overflow: hidden;
}

.cac-guide-pairs {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}

.cac-guide-pair-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 12px;
    background: var(--surface-2);
    border-radius: 10px;
}

.cac-guide-pronoun {
    font-family: var(--serif);
    font-size: 0.85rem;
    color: var(--ink);
}

.cac-guide-verb {
    font-family: var(--mono);
    font-size: 0.66rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--color-nom);
    background: var(--color-nom-bg);
    padding: 3px 9px;
    border-radius: 999px;
}

.cac-guide-verb-changed {
    color: var(--color-irr);
    background: var(--color-irr-bg);
}

.cac-guide-example-de {
    font-family: var(--serif);
    font-size: 0.98rem;
    font-weight: 500;
    color: var(--ink);
    margin: 0;
}

.cac-guide-example-en {
    font-size: 0.78rem;
    color: var(--ink-faint);
    font-style: italic;
    margin: 2px 0 16px;
}

.cac-guide-callout {
    border: 1.5px solid var(--color-nom);
    border-radius: 12px;
    padding: 12px 14px;
    margin: 14px 0;
}

.cac-guide-callout p {
    margin: 0;
    font-size: 0.78rem;
    line-height: 1.55;
    color: var(--ink-soft);
}

.cac-guide-full-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-family: var(--mono);
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--color-nom);
    text-decoration: none;
    transition: transform 0.15s ease;
}

.cac-guide-full-link:hover {
    transform: translateX(2px);
}

.cac-guide-full-link + .cac-guide-full-link {
    display: flex;
    margin-top: 6px;
}

.cac-guide-callout-coo { border-color: var(--color-coo); }
.cac-guide-callout-acc { border-color: var(--color-acc); }
.cac-guide-callout-neg { border-color: var(--color-neg); }

.cac-guide-full-link-coo { color: var(--color-coo); }
.cac-guide-full-link-sub { color: var(--color-sub); }
.cac-guide-full-link-irr { color: var(--color-irr); }
.cac-guide-full-link-acc { color: var(--color-acc); }
.cac-guide-full-link-neg { color: var(--color-neg); }

.cac-fn-card {
    height: 100%;
    min-height: 0;
    overflow-y: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 32px 34px;
    border-radius: 24px;

    border-color: color-mix(in srgb, var(--line) 70%, transparent);
    box-shadow: var(--shadow-md);
}

.cac-fn-card::-webkit-scrollbar {
    display: none;
}

.cac-fn-card > h2 {
    font-family: var(--serif);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--ink);
    margin: 0 0 20px;
}

.cac-fn-page-hint {
    font-size: 0.86rem;
    color: var(--ink-soft);
    margin: -8px 0 20px;
}

.cac-fn-page-list {
    max-width: 1080px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
    align-items: start;
}

.cac-fn-page-list .cac-topic-fn-boxes {
    gap: 10px;
}

.cac-fn-page-list .cac-topic-fn-box {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 16px 40px 16px 18px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-left: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.22s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.22s ease, border-color 0.22s ease;
}

.cac-fn-page-list .cac-topic-fn-box::after {
    content: "\2192";
    position: absolute;
    top: 50%;
    right: 16px;
    transform: translate(4px, -50%);
    color: var(--fn-accent);
    opacity: 0;
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.cac-fn-page-list .cac-topic-fn-box:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--fn-accent);
}

.cac-fn-page-list .cac-topic-fn-box:hover::after {
    opacity: 1;
    transform: translate(0, -50%);
}

.cac-fn-page-list .cac-topic-fn-box-num {
    font-family: var(--mono);
    font-size: 0.62rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--fn-accent);
}

.cac-fn-page-list .cac-topic-fn-box-title {
    font-family: var(--serif);
    font-size: 0.98rem;
    font-weight: 500;
    line-height: 1.35;
    color: var(--ink);
}

.cac-fn-page-list .cac-topic-fn-box.is-active {
    background: color-mix(in srgb, var(--fn-accent) 8%, var(--surface));
    border-color: var(--fn-accent);
    box-shadow: var(--shadow-md);
}

.cac-fn-page-list .cac-topic-fn-box.is-active::after {
    opacity: 1;
    transform: rotate(90deg) translate(4px, -1px);
}

.cac-fn-page-list .cac-topic-fn-box.is-active .cac-topic-fn-box-num,
.cac-fn-page-list .cac-topic-fn-box.is-active .cac-topic-fn-box-title {
    color: var(--fn-accent);
}

.cac-fn-page-detail {
    --fn-accent: var(--color-nom);
    margin: 2px 0 4px;
    padding: 18px 20px;
    background: var(--surface);
    border: 1px solid color-mix(in srgb, var(--fn-accent) 20%, var(--line));
    border-left: 3px solid var(--fn-accent);
    border-radius: 14px;
    box-shadow: var(--shadow-sm);
    animation: cac-fade-in 0.2s var(--ease);
}

.cac-fn-page-detail.cac-topic-fn-box-coo { --fn-accent: var(--color-coo); }
.cac-fn-page-detail.cac-topic-fn-box-sub { --fn-accent: var(--color-sub); }
.cac-fn-page-detail.cac-topic-fn-box-irr { --fn-accent: var(--color-irr); }
.cac-fn-page-detail.cac-topic-fn-box-acc { --fn-accent: var(--color-acc); }
.cac-fn-page-detail.cac-topic-fn-box-neg { --fn-accent: var(--color-neg); }

.cac-fn-num {
    font-family: var(--mono);
    font-size: 0.66rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-nom);
    background: var(--color-nom-bg);
    padding: 4px 10px;
    border-radius: 999px;
    flex-shrink: 0;
}

.cac-fn-dash {
    color: var(--ink-faint);
    font-weight: 400;
}

.cac-fn-subs {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 14px 0;
}

.cac-fn-sub-card {
    background: var(--surface-2);
    border: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
    border-left: 3px solid var(--gold);
    border-radius: 10px;
    padding: 10px 14px;
}

.cac-fn-sub-card-head {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 8px;
}

.cac-fn-sub-card-body {
    font-size: 0.82rem;
    line-height: 1.6;
    color: var(--ink-soft);
    margin: 6px 0 0;
}

.cac-fn-sub-card-body em {
    color: var(--ink);
    font-style: normal;
    font-weight: 600;
}

.cac-fn-sub {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 0 8px 16px;
}

.cac-fn-sub-num {
    font-family: var(--mono);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--gold);
    background: var(--gold-soft);
    padding: 2px 8px;
    border-radius: 999px;
    flex-shrink: 0;
}

.cac-fn-sub-title {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--ink);
}

.cac-fn-sub-example {
    font-family: var(--mono);
    font-size: 0.74rem;
    color: var(--ink-faint);
}

.cac-sidebar-right.is-expanded .cac-fn-subs {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    align-items: start;
}

.cac-fn-stat {
    display: inline-block;
    font-family: var(--mono);
    font-size: 0.66rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--ink-faint);
    margin-top: 6px;
}

.cac-fn-sub-group + .cac-fn-sub-group {
    margin-top: 4px;
}

.cac-fn-sub-nested {
    padding-left: 32px;
    opacity: 0.7;
}

@media (max-width: 560px) {
    .cac-fn-card {
        padding: 26px 22px;
    }
}