/* ==========================================================================
   ThreadNotes — interior pages
   Compact page hero, legal prose, forum, patch notes, product page.
   Depends on core.css (and home.css where a page reuses .split / .mock).
   ========================================================================== */

/* --- Compact page hero ---------------------------------------------------- */

.page-hero {
    position: relative;
    overflow: hidden;
    padding-block: clamp(3.5rem, 9vw, 7rem) clamp(2.5rem, 6vw, 4.5rem);
    border-bottom: 1px solid var(--line);
}

.page-hero__graph {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    touch-action: pan-y;
    opacity: 0.75;
    -webkit-mask-image: linear-gradient(90deg, transparent 8%, #000 55%);
    mask-image: linear-gradient(90deg, transparent 8%, #000 55%);
}

.page-hero__inner {
    position: relative;
    z-index: 1;
    max-width: 44rem;
}

.page-hero h1 {
    font-size: var(--step-4);
    margin-bottom: var(--gap);
}

.page-hero p {
    color: var(--text-dim);
    font-size: var(--step-1);
    line-height: 1.55;
    max-width: 40rem;
}

.page-hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--gap-sm);
    margin-top: clamp(1.75rem, 4vw, 2.5rem);
}

/* --- Legal prose ---------------------------------------------------------- */

.legal {
    display: grid;
    grid-template-columns: 15rem 1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
}

.legal__toc {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
    padding: 1.25rem;
    border-radius: var(--r);
    border: 1px solid var(--line);
    background: var(--surface);
}

.legal__toc h2 {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-faint);
    margin-bottom: 0.85rem;
}

.legal__toc ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.legal__toc a {
    display: block;
    min-height: 2.75rem;
    display: flex;
    align-items: center;
    padding: 0.4rem 0.6rem;
    border-radius: 7px;
    font-size: 0.875rem;
    color: var(--text-dim);
    transition: background-color var(--dur-1) var(--ease-out), color var(--dur-1) var(--ease-out);
}

.legal__toc a:hover {
    background: oklch(100% 0 0 / 0.05);
    color: var(--text);
}

.legal__body {
    max-width: 42rem;
    color: var(--text-dim);
}

.legal__body h2 {
    font-size: var(--step-2);
    color: var(--text);
    margin-top: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: var(--gap);
    scroll-margin-top: calc(var(--header-h) + 1.5rem);
}

.legal__body h2:first-child { margin-top: 0; }

.legal__body h3 {
    font-size: var(--step-1);
    color: var(--text);
    margin-top: var(--gap-lg);
    margin-bottom: 0.6rem;
}

.legal__body p { margin-bottom: var(--gap); }

.legal__body ul,
.legal__body ol {
    margin: 0 0 var(--gap) 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.legal__body li { padding-left: 0.25rem; }
.legal__body li::marker { color: var(--cyan); }

.legal__body a {
    color: var(--cyan);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.legal__meta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.85rem;
    border-radius: var(--r-pill);
    border: 1px solid var(--line);
    background: oklch(100% 0 0 / 0.03);
    font-size: 0.8rem;
    color: var(--text-faint);
    margin-bottom: var(--gap-lg);
}

/* --- Forum ---------------------------------------------------------------- */

.forum {
    display: grid;
    grid-template-columns: 1fr 22rem;
    gap: clamp(2rem, 4vw, 3.5rem);
    align-items: start;
}

.forum__list {
    display: flex;
    flex-direction: column;
    gap: var(--gap);
}

.post {
    display: block;
    padding: 1.35rem 1.5rem;
    border-radius: var(--r);
    border: 1px solid var(--line);
    background: var(--surface);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--dur-2) var(--ease-out),
                border-color var(--dur-2) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
    .post:hover {
        transform: translateX(4px);
        border-color: var(--line-strong);
    }
}

.post__head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--gap);
    margin-bottom: 0.5rem;
}

.post h3 {
    font-size: var(--step-1);
    letter-spacing: -0.02em;
}

.post__meta {
    font-size: 0.85rem;
    color: var(--text-faint);
    margin-bottom: 0.85rem;
}

.post__meta a {
    display: inline-block;
    padding-block: 0.35rem;
    color: var(--text-dim);
}
.post__meta a:hover { color: var(--cyan); }

.post__foot {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-faint);
}

.post__foot span {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.25rem 0.7rem;
    border-radius: var(--r-pill);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    white-space: nowrap;
    border: 1px solid currentColor;
    flex-shrink: 0;
}

.tag::before {
    content: '';
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: currentColor;
}

.tag--open { color: var(--cyan); background: oklch(80% 0.16 205 / 0.1); }
.tag--review { color: var(--warn); background: oklch(82% 0.16 85 / 0.1); }
.tag--done { color: var(--ok); background: oklch(78% 0.17 155 / 0.1); }

.forum__aside {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
    display: flex;
    flex-direction: column;
    gap: var(--gap);
}

.panel {
    padding: 1.5rem;
    border-radius: var(--r);
    border: 1px solid var(--line);
    background: var(--surface);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.panel h2 {
    font-size: var(--step-1);
    margin-bottom: 0.75rem;
}

.panel p {
    color: var(--text-dim);
    font-size: 0.925rem;
    margin-bottom: var(--gap);
}

.panel .field + .field { margin-top: 0.9rem; }

.panel textarea {
    width: 100%;
    min-height: 8rem;
    resize: vertical;
    padding: 0.75rem 1rem;
    border-radius: var(--r-sm);
    border: 1px solid var(--line-strong);
    background: oklch(11% 0.02 275 / 0.75);
    color: var(--text);
    font-size: 0.95rem;
    line-height: 1.6;
}

.panel textarea:focus,
.panel input:focus {
    outline: none;
    border-color: var(--cyan);
    box-shadow: 0 0 0 3px oklch(80% 0.16 205 / 0.18);
}

.panel .btn { width: 100%; margin-top: var(--gap); }

.panel ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    font-size: 0.9rem;
    color: var(--text-dim);
}

.panel li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--gap);
}

.panel li b { color: var(--text); font-variant-numeric: tabular-nums; }

/* --- Patch notes ---------------------------------------------------------- */

.timeline {
    position: relative;
    max-width: 46rem;
    padding-left: 2.5rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0.45rem;
    top: 0.6rem;
    bottom: 0.6rem;
    width: 1px;
    background: linear-gradient(var(--violet), var(--cyan), transparent);
    opacity: 0.45;
}

.release { position: relative; }
.release + .release { margin-top: clamp(2.5rem, 5vw, 3.5rem); }

.release::before {
    content: '';
    position: absolute;
    left: -2.5rem;
    top: 0.55rem;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: var(--grad);
    border: 3px solid var(--bg);
    box-shadow: var(--glow-violet);
}

.release__head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.5rem 1rem;
    margin-bottom: var(--gap);
}

.release__head h2 {
    font-size: var(--step-2);
    letter-spacing: -0.03em;
}

.release__date {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-faint);
}

.changes {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.changes li {
    display: grid;
    grid-template-columns: 5.5rem 1fr;
    gap: 0.9rem;
    align-items: baseline;
    color: var(--text-dim);
    font-size: 0.975rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.15rem 0.5rem;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.66rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border: 1px solid currentColor;
}

.badge--new { color: var(--ok); background: oklch(78% 0.17 155 / 0.1); }
.badge--fix { color: var(--warn); background: oklch(82% 0.16 85 / 0.1); }
.badge--imp { color: var(--cyan); background: oklch(80% 0.16 205 / 0.1); }

/* --- Product page (Dungeon Ledger) ---------------------------------------- */

.product-hero {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: center;
}

.product-hero__logo {
    width: clamp(5rem, 10vw, 7.5rem);
    height: auto;
    border-radius: var(--r);
    margin-bottom: var(--gap-lg);
}

.shot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
    gap: var(--gap-lg);
}

.shot {
    border-radius: var(--r);
    border: 1px solid var(--line);
    background: var(--surface);
    overflow: hidden;
    cursor: zoom-in;
    transition: transform var(--dur-2) var(--ease-out),
                border-color var(--dur-2) var(--ease-out);
}

.shot img {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 950 / 634;
    object-fit: cover;
}

.shot figcaption {
    padding: 0.85rem 1rem;
    font-size: 0.85rem;
    color: var(--text-faint);
    border-top: 1px solid var(--line);
}

@media (hover: hover) and (pointer: fine) {
    .shot:hover { transform: translateY(-4px); border-color: var(--cyan); }
}

/* --- Lightbox ------------------------------------------------------------- */

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--gutter);
    background: oklch(6% 0.015 275 / 0.86);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--dur-2) var(--ease-out), visibility var(--dur-2);
}

.lightbox.is-open { opacity: 1; visibility: visible; }

.lightbox img {
    max-width: min(100%, 1100px);
    max-height: 86dvh;
    border-radius: var(--r);
    border: 1px solid var(--line-strong);
    box-shadow: var(--shadow-3);
}

.lightbox__close {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    width: 2.75rem;
    height: 2.75rem;
    display: grid;
    place-items: center;
    border-radius: 50%;
    border: 1px solid var(--line-strong);
    background: oklch(15% 0.02 275 / 0.8);
    color: var(--text);
}

.lightbox__close:hover { border-color: var(--cyan); color: var(--cyan); }

/* --- 404 ------------------------------------------------------------------ */

.notfound {
    position: relative;
    min-height: calc(100dvh - var(--header-h));
    display: grid;
    place-items: center;
    text-align: center;
    overflow: hidden;
    padding-block: clamp(3rem, 8vw, 6rem);
}

.notfound canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    touch-action: pan-y;
    opacity: 0.6;
    -webkit-mask-image: radial-gradient(70% 60% at 50% 50%, transparent 20%, #000 68%);
    mask-image: radial-gradient(70% 60% at 50% 50%, transparent 20%, #000 68%);
}

.notfound__inner { position: relative; z-index: 1; }

.notfound__code {
    font-family: var(--font-display);
    font-size: clamp(5rem, 18vw, 11rem);
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.05em;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.notfound h1 {
    font-size: var(--step-3);
    margin: var(--gap) 0;
}

.notfound p {
    color: var(--text-dim);
    max-width: 34rem;
    margin: 0 auto clamp(2rem, 4vw, 2.75rem);
}

.notfound__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--gap-sm);
    justify-content: center;
}

/* --- Responsive ----------------------------------------------------------- */

@media (max-width: 960px) {
    .forum { grid-template-columns: 1fr; }

    /* Put the composer above the thread list once they stack. */
    .forum__aside { position: static; order: -1; }

    .legal { grid-template-columns: 1fr; }
    .legal__toc { position: static; }
    .legal__toc ul { flex-direction: row; flex-wrap: wrap; }

    .product-hero { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
    .timeline { padding-left: 1.75rem; }
    .release::before { left: -1.75rem; width: 0.8rem; height: 0.8rem; }
    .changes li { grid-template-columns: 1fr; gap: 0.3rem; }
    .changes li .badge { justify-self: start; }
    .page-hero__actions .btn,
    .page-hero__actions .tip { width: 100%; }
}