/* ==========================================================================
   AI eBook Suite - account, studio and content pages
   (generator, status, My eBooks, preview, API keys, subscribe, user guide,
   API-key guide, KDP guides, legal pages, login/register/profile).
   Loaded per page through templates/_app_css.html, on top of site.css:
   it only uses the design tokens defined there. Vanilla CSS, no build step.
   ========================================================================== */

/* The pages toggle panels, hints and errors with the hidden attribute: never let a display rule override it. */
[hidden] { display: none !important; }

/* ---------- Page shell ---------- */
.page { width: 100%; max-width: 920px; margin: 0 auto; padding: var(--space-5) var(--gutter) var(--space-8); }
.page--narrow { max-width: 560px; }
.page--wide { max-width: 1200px; }
.page-head { margin-bottom: var(--space-6); }
.page-head--center { text-align: center; }
.page-head--center .page-lede { margin-left: auto; margin-right: auto; }
.page-head h1.page-title { margin-bottom: 0; }
.page-eyebrow {
    font-size: var(--fs-xs); font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
    color: var(--c-brand-ink); margin-bottom: 6px;
}
.page-lede { margin-top: var(--space-4); color: var(--c-ink-2); font-size: var(--fs-lg); max-width: 68ch; }
.page-meta { margin-top: var(--space-2); color: var(--c-ink-3); font-size: var(--fs-sm); }
:lang(zh) h1.page-title, :lang(ja) h1.page-title, :lang(ko) h1.page-title,
:lang(zh) .prose h2, :lang(ja) .prose h2, :lang(ko) .prose h2 { font-family: var(--font-sans); letter-spacing: 0; }

/* Auth pages keep site.css .container (white card); this only narrows it. */
.container.container--narrow {
    max-width: 520px; width: calc(100% - 2 * var(--gutter));
    margin: var(--space-5) auto var(--space-6);
}

/* ---------- Cards ---------- */
.card {
    background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-1); padding: clamp(18px, 4vw, 32px);
}
.card + .card, .card + .callout, .callout + .card { margin-top: var(--space-5); }
.card-title { font-size: var(--fs-h3); font-weight: 700; color: var(--c-ink); line-height: 1.3; margin-bottom: var(--space-2); }
.card-sub { color: var(--c-ink-2); font-size: var(--fs-sm); margin-bottom: var(--space-4); }
.muted { color: var(--c-ink-3); }
.small { font-size: var(--fs-sm); }
.tiny { font-size: var(--fs-xs); }
.mt-0 { margin-top: 0 !important; }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.text-center { text-align: center; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    min-height: 44px; padding: 0.6rem 1.1rem; border-radius: var(--radius-md);
    border: 1px solid transparent; background: var(--c-surface); color: var(--c-ink);
    font: inherit; font-weight: 650; font-size: 1rem; line-height: 1.25; text-align: center;
    text-decoration: none; cursor: pointer; white-space: normal;
    transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}
.btn:hover { text-decoration: none; }
.btn .icon { width: 1.1em; height: 1.1em; }
.btn--primary { background: var(--c-brand-ink); color: #fff; }
.btn--primary:hover { background: var(--c-brand-ink-strong); color: #fff; }
.btn--outline { background: #fff; color: var(--c-brand-ink); border-color: var(--c-brand-ink); }
.btn--outline:hover { background: var(--c-brand-tint); color: var(--c-brand-ink-strong); }
.btn--neutral { background: #fff; color: var(--c-ink); border-color: var(--c-line-strong); }
.btn--neutral:hover { background: var(--c-surface); color: var(--c-ink); }
.btn--danger { background: #fff; color: var(--c-danger); border-color: #f3b8b1; }
.btn--danger:hover { background: var(--c-danger-bg); color: #8a1c12; }
.btn--ghost { background: transparent; color: var(--c-ink-2); }
.btn--ghost:hover { background: var(--c-surface); color: var(--c-ink); }
.btn--sm { min-height: 38px; padding: 0.4rem 0.8rem; font-size: 0.9rem; }
.btn--lg { min-height: 52px; padding: 0.8rem 1.4rem; font-size: 1.0625rem; }
.btn--block { width: 100%; }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .65; cursor: not-allowed; }
.btn-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.btn-row--center { justify-content: center; }
.btn-row--end { justify-content: flex-end; }
@media (max-width: 479px) { .btn-row--stack > .btn, .btn-row--stack > form, .btn-row--stack > form .btn { width: 100%; } }
form.inline { display: inline; margin: 0; }
.linkbtn { background: none; border: 0; padding: 0; font: inherit; color: var(--c-brand-ink); cursor: pointer; text-decoration: underline; }

.spinner {
    display: inline-block; width: 1.1em; height: 1.1em; flex: none; vertical-align: -0.2em;
    border: .16em solid currentColor; border-right-color: transparent; border-radius: 50%;
    animation: app-spin .8s linear infinite;
}
.spinner--lg { width: 28px; height: 28px; border-width: 3px; color: var(--c-brand-ink); }
@keyframes app-spin { to { transform: rotate(360deg); } }

/* ---------- Callouts ---------- */
.callout {
    display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; margin: 0 0 var(--space-5);
    border-radius: var(--radius-md); border: 1px solid var(--c-line); background: #fff; color: var(--c-ink);
    line-height: 1.6;
}
.callout > .icon { width: 1.35em; height: 1.35em; margin-top: 1px; }
.callout__body { flex: 1; min-width: 0; }
.callout__body > * + * { margin-top: 6px; }
.callout__title { font-weight: 700; }
.callout--info { background: var(--c-info-bg); border-color: #a8dcf7; }
.callout--info > .icon { color: var(--c-brand-ink); }
.callout--warning { background: var(--c-warning-bg); border-color: #f2d48a; }
.callout--warning > .icon { color: var(--c-warning); }
.callout--success { background: var(--c-success-bg); border-color: #a7dcb6; }
.callout--success > .icon { color: var(--c-success); }
.callout--danger { background: var(--c-danger-bg); border-color: #f3b8b1; }
.callout--danger > .icon { color: var(--c-danger); }
.callout a { font-weight: 600; text-decoration: underline; }

/* ---------- Long-form text (legal pages, guides) ---------- */
.prose { color: var(--c-ink-2); line-height: 1.75; overflow-wrap: break-word; }
.prose > :first-child { margin-top: 0; }
.prose h2 {
    font-family: var(--font-serif); font-size: clamp(1.3rem, 1.1rem + 0.8vw, 1.6rem); line-height: 1.3;
    color: var(--c-ink); margin: 2.2em 0 0.6em; scroll-margin-top: 80px;
}
.prose h3 { font-size: 1.1rem; line-height: 1.4; color: var(--c-ink); margin: 1.6em 0 0.5em; font-weight: 700; scroll-margin-top: 80px; }
.prose p, .prose ul, .prose ol, .prose dl, .prose .table-wrap, .prose .callout { margin-bottom: 1em; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li { margin-bottom: 0.45em; }
.prose li > ul, .prose li > ol { margin-top: 0.45em; margin-bottom: 0.2em; }
.prose strong { color: var(--c-ink); font-weight: 650; }
.prose a { text-decoration: underline; text-underline-offset: 2px; }
.prose code {
    font-family: var(--font-mono); font-size: 0.9em; background: var(--c-surface); color: var(--c-ink);
    border: 1px solid var(--c-line); border-radius: 4px; padding: 1px 5px;
}
.prose address { font-style: normal; }
.prose .callout p { margin: 0; }
.table-wrap { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.prose table, table.table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); line-height: 1.5; }
.prose th, .prose td, .table th, .table td { border: 1px solid var(--c-line); padding: 10px 12px; text-align: left; vertical-align: top; }
.prose th, .table th { background: var(--c-surface); color: var(--c-ink); font-weight: 650; }
.prose td code { white-space: nowrap; }
/* Phones: tables marked .table-stack become one card per row; each cell shows its column name (data-label). */
@media (max-width: 640px) {
    .table-stack thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
    .table-stack, .table-stack tbody, .table-stack tr, .table-stack td { display: block; width: 100%; }
    .table-stack tr {
        border: 1px solid var(--c-line); border-radius: var(--radius-md); background: #fff;
        padding: 6px 14px; margin-bottom: 12px;
    }
    .prose .table-stack td { border: 0; padding: 6px 0; }
    .prose .table-stack td + td { border-top: 1px solid var(--c-line); }
    .table-stack td::before {
        content: attr(data-label); display: block; margin-bottom: 2px;
        font-size: var(--fs-xs); font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--c-ink-3);
    }
    .table-stack td code { white-space: normal; overflow-wrap: anywhere; }
}

.toc { background: var(--c-surface); border: 1px solid var(--c-line); border-radius: var(--radius-md); padding: 14px 18px; margin-bottom: var(--space-6); }
.toc__title { font-size: var(--fs-xs); font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--c-ink-3); margin-bottom: 6px; }
.toc ol { margin: 0; padding-left: 1.3em; columns: 2 220px; column-gap: var(--space-6); font-size: var(--fs-sm); }
.toc li { margin-bottom: 4px; break-inside: avoid; }

/* Guide pages: numbered steps, pricing cards */
.steps { list-style: none; padding: 0 !important; counter-reset: step; }
.steps > li { position: relative; padding-left: 44px; margin-bottom: var(--space-4); }
.steps > li::before {
    counter-increment: step; content: counter(step); position: absolute; left: 0; top: 0;
    width: 30px; height: 30px; border-radius: 50%; background: var(--c-brand-tint); color: var(--c-brand-ink);
    font-weight: 700; font-size: 0.9rem; display: flex; align-items: center; justify-content: center;
}
.grid-2 { display: grid; gap: var(--space-4); grid-template-columns: 1fr; margin-bottom: 1em; }
@media (min-width: 680px) { .grid-2 { grid-template-columns: 1fr 1fr; } }
.mini-card { border: 1px solid var(--c-line); border-radius: var(--radius-md); padding: 16px 18px; background: #fff; }
.mini-card h3, .mini-card h4 { margin-top: 0 !important; font-size: 1.02rem; color: var(--c-ink); margin-bottom: 6px; }
.mini-card p { margin-bottom: 0.4em !important; }
.cta-band {
    margin-top: var(--space-7); padding: clamp(22px, 4vw, 36px); border-radius: var(--radius-lg);
    background: var(--c-night); color: var(--c-on-night); text-align: center;
}
.cta-band h2 { color: #fff !important; margin: 0 0 0.4em !important; font-family: var(--font-serif); font-size: clamp(1.3rem, 1.1rem + 0.8vw, 1.7rem); }
.cta-band p { color: var(--c-on-night-2) !important; max-width: 60ch; margin: 0 auto 1em !important; }
.cta-band .btn--primary { background: var(--c-brand); color: var(--c-night); }
.cta-band .btn--primary:hover { background: #33bbff; color: var(--c-night); }
.cta-band .btn--ghost { color: #fff; border-color: rgba(255, 255, 255, .3); }
.cta-band .btn--ghost:hover { background: rgba(255, 255, 255, .08); color: #fff; }
.cta-band :focus-visible { outline-color: var(--c-brand); }

/* Language tabs (API-key guide) */
.lang-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: var(--space-5); }
.lang-tabs a {
    display: inline-flex; align-items: center; min-height: 36px; padding: 0.3rem 0.75rem; border-radius: var(--radius-pill);
    border: 1px solid var(--c-line-strong); color: var(--c-ink-2); font-size: var(--fs-sm); font-weight: 600; background: #fff;
}
.lang-tabs a:hover { border-color: var(--c-brand-ink); color: var(--c-brand-ink); text-decoration: none; }
.lang-tabs a[aria-current="page"] { background: var(--c-brand-ink); border-color: var(--c-brand-ink); color: #fff; }

/* ---------- Forms ---------- */
.form-hint { display: block; margin-top: 6px; color: var(--c-ink-3); font-size: var(--fs-xs); line-height: 1.5; }
.form-row { display: grid; grid-template-columns: 1fr; column-gap: var(--space-5); }
@media (min-width: 640px) { .form-row { grid-template-columns: 1fr 1fr; } }
.form-check { display: flex; gap: 10px; align-items: flex-start; margin-bottom: var(--space-4); line-height: 1.5; }
.form-check input[type="checkbox"] { width: 18px; height: 18px; margin-top: 3px; flex: none; accent-color: var(--c-brand-ink); }
.form-check label { font-size: var(--fs-sm); color: var(--c-ink-2); }
.form-submit { margin-top: var(--space-5); display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.form-group .form-label .opt { font-weight: 500; color: var(--c-ink-3); }
fieldset.card { min-width: 0; }
fieldset.card > legend {
    float: left; width: 100%; padding: 0; margin-bottom: var(--space-4);
    font-size: var(--fs-h3); font-weight: 700; color: var(--c-ink);
}
fieldset.card > legend + * { clear: both; }
.input-with-toggle { position: relative; }
.input-with-toggle input { padding-right: 5.5rem !important; }
.input-with-toggle .toggle {
    position: absolute; right: 6px; top: 50%; transform: translateY(-50%); min-height: 34px;
    padding: 0.2rem 0.6rem; border-radius: var(--radius-sm); border: 1px solid var(--c-line-strong);
    background: #fff; color: var(--c-ink-2); font-size: var(--fs-xs); font-weight: 600; cursor: pointer;
}
.estimate { margin-top: var(--space-2); padding: 12px 14px; border-radius: var(--radius-md); background: var(--c-surface); border: 1px dashed var(--c-line-strong); font-size: var(--fs-sm); color: var(--c-ink-2); }
.estimate strong { color: var(--c-ink); }
.form-errors { margin: 0 0 var(--space-5); }
.form-errors ul { margin: 6px 0 0 1.2em; }

/* ---------- Status badges and progress ---------- */
.badge {
    display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: var(--radius-pill);
    font-size: var(--fs-xs); font-weight: 700; line-height: 1.5; border: 1px solid transparent; white-space: nowrap;
}
.badge--success { background: var(--c-success-bg); color: #14532d; border-color: #a7dcb6; }
.badge--info { background: var(--c-info-bg); color: #024a75; border-color: #a8dcf7; }
.badge--warning { background: var(--c-warning-bg); color: var(--c-warning); border-color: #f2d48a; }
.badge--danger { background: var(--c-danger-bg); color: #8a1c12; border-color: #f3b8b1; }
.badge--neutral { background: var(--c-surface); color: var(--c-ink-2); border-color: var(--c-line-strong); }
.progress { height: 10px; background: var(--c-line); border-radius: var(--radius-pill); overflow: hidden; }
.progress__bar { height: 100%; width: 0; background: var(--c-brand-ink); border-radius: inherit; transition: width .6s ease; }
.progress--sm { height: 6px; }

/* ---------- Generation status page ---------- */
.status-card { text-align: center; }
.status-card .status-headline { display: flex; align-items: center; justify-content: center; gap: 10px; font-size: 1.15rem; font-weight: 700; color: var(--c-ink); }
.status-card .status-step { margin-top: var(--space-2); color: var(--c-ink-2); }
.status-card .progress { max-width: 460px; margin: var(--space-4) auto 0; }
.status-card .status-pct { margin-top: 6px; font-size: var(--fs-xs); color: var(--c-ink-3); }
.status-card .callout { text-align: left; margin-top: var(--space-4); margin-bottom: 0; }
.status-actions { margin-top: var(--space-5); }
.status-help { margin-top: var(--space-4); padding-left: 1.2em; font-size: var(--fs-sm); color: var(--c-ink-3); text-align: left; }
.status-help li { margin-bottom: 4px; }
.status-foot { margin-top: var(--space-4); font-size: var(--fs-xs); color: var(--c-ink-3); }
.downloads { display: grid; gap: 10px; grid-template-columns: 1fr; margin-top: var(--space-4); }
@media (min-width: 560px) { .downloads { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.downloads .btn { justify-content: flex-start; }
.downloads .btn small { font-weight: 500; color: inherit; opacity: .85; }

/* ---------- My eBooks ---------- */
.lib-grid { list-style: none; display: grid; gap: var(--space-5); grid-template-columns: repeat(auto-fill, minmax(min(100%, 330px), 1fr)); }
.book-card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-lg); box-shadow: var(--shadow-1); min-width: 0; }
.book-card__body { padding: 18px 20px 14px; flex: 1; min-width: 0; }
.book-card__title { font-size: 1.1rem; font-weight: 700; line-height: 1.35; color: var(--c-ink); margin: 8px 0 6px; overflow-wrap: anywhere; }
.book-card__title a { color: inherit; }
.book-card__meta { list-style: none; display: grid; gap: 2px; font-size: var(--fs-sm); color: var(--c-ink-2); }
.book-card__meta strong { color: var(--c-ink); font-weight: 600; }
.book-card__progress { margin-top: 10px; }
.book-card__progress .tiny { margin-top: 4px; color: var(--c-ink-3); }
.book-card__actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 12px 20px 16px; border-top: 1px solid var(--c-line); }
.book-card__actions .spacer { flex: 1; }
.menu { position: relative; }
.menu > summary { list-style: none; }
.menu > summary::-webkit-details-marker { display: none; }
.menu__list {
    position: absolute; z-index: 20; left: 0; top: calc(100% + 6px); min-width: 230px; list-style: none;
    background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-md); box-shadow: var(--shadow-2); padding: 6px;
}
.menu__list a { display: block; padding: 8px 10px; border-radius: var(--radius-sm); color: var(--c-ink); font-size: var(--fs-sm); }
.menu__list a:hover { background: var(--c-surface); text-decoration: none; }
.menu__list small { color: var(--c-ink-3); }
.pagination { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 6px; margin-top: var(--space-6); }
.pagination a, .pagination span {
    min-width: 40px; min-height: 40px; display: inline-flex; align-items: center; justify-content: center; padding: 0 12px;
    border-radius: var(--radius-sm); border: 1px solid var(--c-line-strong); background: #fff; color: var(--c-brand-ink); font-size: var(--fs-sm);
}
.pagination a:hover { background: var(--c-brand-tint); text-decoration: none; }
.pagination [aria-current="page"] { background: var(--c-brand-ink); border-color: var(--c-brand-ink); color: #fff; font-weight: 700; }
.pagination .gap { border: 0; background: none; min-width: 0; }
.empty { text-align: center; padding: clamp(28px, 6vw, 56px) 20px; }
.empty .icon { width: 44px; height: 44px; color: var(--c-brand-ink); margin: 0 auto var(--space-3); display: block; }

/* ---------- Preview ---------- */
.reader-frame {
    display: block; width: 100%; height: min(78vh, 1100px); min-height: 420px;
    border: 1px solid var(--c-line); border-radius: var(--radius-md); background: #fdfaf6;
}
.preview-toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between; margin-bottom: var(--space-4); }

/* ---------- API keys ---------- */
.key-list { list-style: none; display: grid; gap: 10px; }
.key-item { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; padding: 14px 16px; border: 1px solid var(--c-line); border-radius: var(--radius-md); background: #fff; }
.key-item__main { flex: 1 1 220px; min-width: 0; }
.key-item__name { font-weight: 700; color: var(--c-ink); }
.key-item__meta { font-size: var(--fs-sm); color: var(--c-ink-3); overflow-wrap: anywhere; }
.key-item--legacy { background: var(--c-surface); }

/* ---------- Pricing (subscribe) ---------- */
.plan { max-width: 560px; margin: 0 auto; }
.plan__price { display: flex; align-items: baseline; gap: 8px; margin: 6px 0 4px; color: var(--c-ink); }
.plan__amount { font-size: clamp(2.6rem, 2rem + 2.4vw, 3.4rem); font-weight: 800; line-height: 1; letter-spacing: -0.02em; }
.plan__period { color: var(--c-ink-2); font-weight: 600; }
.checklist { list-style: none; display: grid; gap: 10px; margin: var(--space-5) 0; }
.checklist li { display: flex; gap: 10px; align-items: flex-start; color: var(--c-ink); }
.checklist .icon { color: var(--c-success); margin-top: 0.15em; }
.checklist--muted li { color: var(--c-ink-2); }
.checklist--muted .icon { color: var(--c-ink-3); }
.fineprint { font-size: var(--fs-xs); color: var(--c-ink-3); line-height: 1.6; }