/* Longgrid — long-form document & news pages */

[hidden] {
  display: none !important;
}

html:has(.longgrid-page) {
  background-color: var(--color-bg);
}

body.longgrid-page {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg);
}

.longgrid-page {
  background-color: var(--color-bg);
}

.longgrid-bg {
  position: fixed;
  inset: 0 0 auto 0;
  width: 100%;
  height: clamp(1100px, 135vh, 1700px);
  pointer-events: none;
  z-index: 0;
  background-color: var(--color-bg);
  background-image: url("../img/bg/longgrid_bg.webp");
  background-repeat: no-repeat;
  background-position: top center;
  background-size: max(100%, 1920px) auto;
  filter: saturate(0.82) contrast(1.03) brightness(0.58);
}

/* Atmospheric mask — image stays visible through hero and content start */
.longgrid-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(
      circle at 50% 12%,
      rgba(11, 9, 8, 0.28) 0%,
      rgba(11, 9, 8, 0.58) 38%,
      rgba(11, 9, 8, 0.86) 68%,
      var(--color-bg) 100%
    ),
    linear-gradient(
      180deg,
      rgba(11, 9, 8, 0.2) 0%,
      rgba(11, 9, 8, 0.54) 34%,
      rgba(11, 9, 8, 0.88) 68%,
      var(--color-bg) 100%
    );
}

/* Bottom fade-cover — opaque base color, no image peek on short pages */
.longgrid-bg::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 34%;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    rgba(11, 9, 8, 0) 0%,
    rgba(11, 9, 8, 0.45) 38%,
    var(--color-bg) 58%,
    var(--color-bg) 100%
  );
}

/* Do not override .site-header position — components.css uses position: fixed */
.longgrid-page .longgrid-main,
.longgrid-page .site-footer,
.longgrid-page .sticky-cta {
  position: relative;
  z-index: 1;
}

body.longgrid-page > .longgrid-main {
  flex: 1 0 auto;
}

body.longgrid-page > .site-footer {
  flex-shrink: 0;
  margin-top: auto;
  margin-bottom: 0;
  background: linear-gradient(
    180deg,
    var(--color-bg) 0%,
    var(--color-bg-elevated) 20%,
    #131227 100%
  );
}

@media (min-width: 768px) {
  body.longgrid-page.has-sticky-cta {
    padding-bottom: 0;
  }
}

.longgrid-main {
  min-height: 0;
  background-color: transparent;
}

/* Hero */
.longgrid-hero {
  position: relative;
  background: transparent;
  padding-block: calc(var(--header-h) + var(--space-10)) var(--space-8);
  text-align: center;
}

.longgrid-hero__eyebrow {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-soft);
  margin-bottom: var(--space-3);
}

.longgrid-hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  font-weight: normal;
  line-height: var(--leading-tight);
  color: var(--color-text);
  max-width: 20ch;
  margin-inline: auto;
  margin-bottom: var(--space-4);
}

.longgrid-hero__meta {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Content section — transparent so background shows behind article/TOC panels */
.longgrid-content-section {
  position: relative;
  overflow: visible;
  padding-block: var(--space-6) var(--section-py);
  background: transparent;
}

.longgrid-content-section > .container {
  width: min(100% - var(--space-8), 1240px);
}

.longgrid-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: clamp(var(--space-6), 4vw, var(--space-12));
  align-items: start;
  overflow: visible;
}

.longgrid-layout > * {
  min-width: 0;
  max-width: 100%;
}

.longgrid-layout--article-only,
.longgrid-layout--no-toc {
  grid-template-columns: minmax(0, 1fr);
  justify-content: center;
}

.longgrid-layout--article-only .longgrid-article,
.longgrid-layout--no-toc .longgrid-article {
  grid-column: 1;
  max-width: 860px;
  margin-inline: auto;
  width: 100%;
}

.longgrid-layout--no-toc .longgrid-toc {
  display: none !important;
}

.longgrid-toc[hidden] {
  display: none !important;
}

/* Table of contents — sticky on aside (desktop only, see media queries) */
.longgrid-toc {
  align-self: start;
}

.longgrid-toc__nav {
  padding: var(--space-5);
  border: 1px solid rgba(233, 193, 86, 0.2);
  border-radius: var(--radius-lg);
  background: rgba(16, 15, 13, 0.78);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-panel);
}

@media (min-width: 1024px) {
  .longgrid-toc {
    position: sticky;
    top: calc(var(--header-h) + var(--space-6));
    max-height: calc(100dvh - var(--header-h) - var(--space-12));
    overflow: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }
}

.longgrid-toc__title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-soft);
  margin-bottom: var(--space-4);
}

.longgrid-toc__list {
  display: grid;
  gap: 2px;
}

.longgrid-toc__link {
  display: block;
  padding: 9px 12px;
  border-radius: 10px;
  font-size: var(--text-sm);
  line-height: 1.35;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition:
    color 180ms var(--ease-out),
    background 180ms var(--ease-out),
    transform 180ms var(--ease-out);
}

.longgrid-toc__link:hover,
.longgrid-toc__link:focus-visible {
  color: var(--color-accent);
  background: rgba(245, 162, 15, 0.08);
}

.longgrid-toc__link.is-active {
  color: var(--color-accent);
  background: rgba(245, 162, 15, 0.12);
}

.longgrid-toc__link--sub {
  padding-left: 24px;
  font-size: 0.92em;
  opacity: 0.88;
}

/* Article panel */
.longgrid-article {
  max-width: 860px;
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid rgba(233, 193, 86, 0.22);
  border-radius: 24px;
  background: rgba(16, 15, 13, 0.78);
  backdrop-filter: blur(12px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
}

.longgrid-article > * + * {
  margin-top: var(--space-5);
}

.longgrid-article h2 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: normal;
  line-height: var(--leading-tight);
  color: var(--color-accent);
  margin-top: var(--space-10);
  scroll-margin-top: calc(var(--header-h) + var(--space-6));
}

.longgrid-article h2:first-child,
.longgrid-article > h2:first-of-type {
  margin-top: 0;
}

.longgrid-article h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: normal;
  line-height: var(--leading-tight);
  color: var(--color-gold-border);
  margin-top: var(--space-8);
  scroll-margin-top: calc(var(--header-h) + var(--space-6));
}

.longgrid-anchor {
  scroll-margin-top: calc(var(--header-h) + var(--space-6));
}

.longgrid-article p {
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.longgrid-article ul,
.longgrid-article ol {
  list-style: revert;
  padding-left: 1.35em;
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.longgrid-article li + li {
  margin-top: var(--space-2);
}

.longgrid-article li::marker {
  color: var(--color-accent-muted);
}

.longgrid-article blockquote {
  margin: var(--space-6) 0;
  padding: var(--space-5) var(--space-6);
  border-left: 3px solid var(--color-accent-muted);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(11, 9, 8, 0.55);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text);
  font-style: italic;
}

.longgrid-article table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  line-height: 1.5;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.longgrid-article th,
.longgrid-article td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border: 1px solid rgba(233, 193, 86, 0.18);
  color: var(--color-text-secondary);
  min-width: 8rem;
}

.longgrid-article th {
  font-family: var(--font-display);
  font-weight: normal;
  color: var(--color-accent-soft);
  background: rgba(20, 17, 14, 0.85);
}

.longgrid-article tr:nth-child(even) td {
  background: rgba(11, 9, 8, 0.35);
}

.longgrid-article a {
  color: var(--color-gold-border);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

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

.longgrid-article code {
  font-size: 0.9em;
  padding: 0.12em 0.35em;
  border-radius: var(--radius-sm);
  background: rgba(11, 9, 8, 0.65);
  color: var(--color-text);
  word-break: break-all;
}

/* News detail variant */
.longgrid-hero--news .longgrid-hero__badge {
  display: inline-block;
  margin-bottom: var(--space-4);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-bg);
  background: linear-gradient(135deg, var(--color-cta-from), var(--color-cta-to));
  border-radius: 999px;
}

.longgrid-article__figure {
  margin: var(--space-6) 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(233, 193, 86, 0.2);
  aspect-ratio: 16 / 9;
  background: linear-gradient(
    145deg,
    rgba(26, 22, 18, 0.9) 0%,
    rgba(11, 9, 8, 0.95) 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.longgrid-article__back {
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(245, 162, 15, 0.12);
}

/* Mobile — TOC not sticky */
@media (max-width: 1023px) {
  .longgrid-layout {
    grid-template-columns: 1fr;
  }

  .longgrid-toc {
    position: static;
    max-height: none;
    overflow: visible;
  }

  .longgrid-toc__nav {
    margin-bottom: var(--space-4);
  }

  .longgrid-toc__list {
    max-height: min(40vh, 320px);
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
  }

  .longgrid-article {
    max-width: none;
  }
}

@media (max-width: 767px) {
  body.longgrid-page.has-sticky-cta {
    padding-bottom: calc(var(--sticky-cta-h) + var(--space-6) + env(safe-area-inset-bottom, 0));
  }

  .longgrid-bg {
    height: clamp(1000px, 125vh, 1400px);
    background-size: 100% auto;
    filter: saturate(0.78) contrast(1.02) brightness(0.52);
  }

  .longgrid-bg::after {
    background:
      radial-gradient(
        circle at 50% 10%,
        rgba(11, 9, 8, 0.32) 0%,
        rgba(11, 9, 8, 0.62) 40%,
        rgba(11, 9, 8, 0.88) 70%,
        var(--color-bg) 100%
      ),
      linear-gradient(
        180deg,
        rgba(11, 9, 8, 0.24) 0%,
        rgba(11, 9, 8, 0.58) 36%,
        rgba(11, 9, 8, 0.9) 70%,
        var(--color-bg) 100%
      );
  }

  .longgrid-bg::before {
    height: 38%;
  }

  .longgrid-hero {
    padding-block: calc(var(--header-h) + var(--space-8)) var(--space-6);
  }

  .longgrid-hero__title {
    max-width: none;
  }

  .longgrid-article {
    border-radius: 18px;
    padding: var(--space-5);
  }
}

@media (prefers-reduced-motion: reduce) {
  .longgrid-toc__link {
    transition: none;
  }
}