/* =========================================================
   Riven — The Journal (blog index + article)
   Light reading surface. Quiet, clinical, instrument-grade.
   Tokens from the design system; one accent (riven), hairlines,
   mono for measured things. No blur, no gradients, no slop.
   ========================================================= */

@import url('./assets/riven/colors_and_type.css');

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; background: var(--paper); }
body {
  font-family: var(--font-sans);
  color: var(--fg-1);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: rgba(255,70,34,0.16); }

a { color: inherit; }
img { display: block; max-width: 100%; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 40px; }
.wrap-read { max-width: 720px; margin: 0 auto; padding: 0 40px; }

.overline {
  font-family: var(--font-mono); font-weight: 500;
  font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--fg-3);
}
.overline .dot {
  display: inline-block; width: 6px; height: 6px; border-radius: 99px;
  background: var(--riven); margin-right: 9px; vertical-align: middle;
  position: relative; top: -1px;
}
.accent { color: var(--riven); }

/* ============== NAV (light, sticky, hairline) ============== */
.bnav {
  position: sticky; top: 0; z-index: 100;
  background: var(--paper);
  border-bottom: 1px solid var(--hairline);
}
.bnav-inner {
  max-width: 1160px; margin: 0 auto; padding: 17px 40px;
  display: flex; align-items: center; justify-content: space-between; gap: 28px;
}
.bnav-logo { display: inline-flex; align-items: center; }
.bnav-logo img { height: 23px; }
.bnav-nav { display: flex; align-items: center; gap: 30px; }
.bnav-nav a {
  font-family: var(--font-sans); font-size: 15px; font-weight: 500;
  color: var(--fg-2); text-decoration: none; letter-spacing: -0.01em;
  transition: color var(--dur-fast) var(--ease-out);
}
.bnav-nav a:hover { color: var(--obsidian); }
.bnav-nav a.is-current { color: var(--obsidian); }
.bnav-right { display: flex; align-items: center; gap: 22px; }

/* compact dark App Store badge (good contrast on paper) */
.as-badge {
  display: inline-flex; align-items: center; gap: 9px;
  background: var(--obsidian); color: #fff;
  padding: 8px 15px 8px 13px; border-radius: 11px;
  text-decoration: none; white-space: nowrap;
  transition: transform var(--dur-fast) var(--ease-out);
}
.as-badge:hover { transform: translateY(-1px); }
.as-badge svg { width: 22px; height: 22px; flex-shrink: 0; }
.as-badge .ascopy { display: flex; flex-direction: column; align-items: flex-start; line-height: 1; }
.as-badge .ascopy .top { font-size: 8px; letter-spacing: 0.04em; opacity: 0.72; margin-bottom: 3px; }
.as-badge .ascopy .bot { font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }

/* ============== MASTHEAD ============== */
.masthead { padding: 88px 0 0; }
.masthead h1 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(48px, 7vw, 96px); line-height: 0.94; letter-spacing: -0.04em;
  margin: 22px 0 0; color: var(--obsidian); text-wrap: balance;
}
.masthead .lede {
  font-size: clamp(17px, 1.5vw, 20px); line-height: 1.55; color: var(--fg-2);
  max-width: 560px; margin: 26px 0 0; letter-spacing: -0.005em;
}

/* topic filter — mono chips */
.topics {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin: 48px 0 0; padding: 28px 0 0; border-top: 1px solid var(--hairline);
}
.topics a {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--fg-3); text-decoration: none; white-space: nowrap;
  padding: 8px 14px; border: 1px solid var(--hairline); border-radius: 999px;
  transition: color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.topics a:hover { color: var(--obsidian); border-color: rgba(10,10,11,0.22); }
.topics a.is-active { color: var(--white); background: var(--obsidian); border-color: var(--obsidian); }

/* ============== FEATURED ============== */
.featured {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center;
  padding: 56px 0 64px; margin-top: 40px;
  border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline);
}
.featured .f-media { order: 2; }
.featured .f-body { order: 1; }
.tag {
  font-family: var(--font-mono); font-weight: 500; font-size: 12px;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--riven);
}
.featured h2 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(30px, 3.4vw, 46px); line-height: 1.03; letter-spacing: -0.03em;
  margin: 16px 0 0; color: var(--obsidian); text-wrap: balance;
}
.featured h2 a { text-decoration: none; }
.featured .deck {
  font-size: 18px; line-height: 1.55; color: var(--fg-2); margin: 18px 0 0;
  max-width: 46ch; letter-spacing: -0.005em;
}
.meta {
  display: flex; align-items: center; gap: 12px; margin-top: 26px;
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.02em; color: var(--fg-3);
  font-variant-numeric: tabular-nums;
}
.meta .sep { width: 4px; height: 4px; border-radius: 99px; background: var(--linen); }
.read-link {
  display: inline-flex; align-items: center; gap: 9px; margin-top: 30px;
  font-family: var(--font-sans); font-weight: 600; font-size: 15px; letter-spacing: -0.01em;
  color: var(--obsidian); text-decoration: none;
}
.read-link .arrow { transition: transform var(--dur-fast) var(--ease-out); }
.read-link:hover .arrow { transform: translateX(4px); }

/* ============== IMAGE PLATE (placeholder) ==============
   Deliberate dark plate standing in for a B&W instrument photo.
   Drop a real <img> in place when assets land. */
.plate {
  position: relative; overflow: hidden;
  background:
    radial-gradient(130% 120% at 30% 0%, #1d1d22 0%, #0c0c0e 60%, #060607 100%);
  border-radius: var(--radius-4);
  color: var(--fog);
}
.plate::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/><feColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.5 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  opacity: 0.05; mix-blend-mode: screen;
}
/* diagonal seam — the "riven" motif */
.plate::after {
  content: ''; position: absolute; top: -10%; bottom: -10%; left: 62%; width: 1px;
  background: linear-gradient(180deg, transparent, rgba(255,70,34,0.5), transparent);
  transform: rotate(12deg); transform-origin: center;
}
.plate .pl-mark {
  position: absolute; top: 16px; right: 16px; width: 18px; height: 18px;
  background: rgba(255,255,255,0.5);
  -webkit-mask: url(assets/riven/riven-mark.svg) center/contain no-repeat;
  mask: url(assets/riven/riven-mark.svg) center/contain no-repeat;
}
.plate .pl-cap {
  position: absolute; left: 16px; bottom: 14px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--steel);
}
/* real photo inside the plate — grayscale instrument tone, mark/cap/seam ride on top */
.plate.has-photo { background: #0c0c0e; }
.plate img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: center;
  display: block;
}
.plate .pl-shade {
  position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg,
    rgba(6,6,7,0.42) 0%, rgba(6,6,7,0) 26%,
    rgba(6,6,7,0) 58%, rgba(6,6,7,0.58) 100%);
}

.plate.r-43 { aspect-ratio: 4 / 3; }
.plate.r-32 { aspect-ratio: 3 / 2; }
.plate.r-169 { aspect-ratio: 16 / 9; }
.plate.r-11 { aspect-ratio: 1 / 1; }

/* ============== ARTICLE INDEX (list) ============== */
.index-head {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 64px 0 0;
}
.index-head h3 {
  font-family: var(--font-sans); font-weight: 600; font-size: 22px; letter-spacing: -0.02em;
  margin: 0; color: var(--obsidian);
}
.index-head .count { font-family: var(--font-mono); font-size: 13px; color: var(--fg-3); font-variant-numeric: tabular-nums; }

.post-list { margin: 24px 0 0; border-top: 1px solid var(--hairline); }
.post {
  display: grid; grid-template-columns: 56px 1fr 220px; gap: 36px; align-items: start;
  padding: 36px 0; border-bottom: 1px solid var(--hairline);
  text-decoration: none; color: inherit;
  transition: opacity var(--dur-med) var(--ease-out);
}
.post:hover { opacity: 1; }
.post:hover h4 { color: var(--riven); }
.post .num { font-family: var(--font-mono); font-size: 13px; color: var(--fg-3); padding-top: 3px; font-variant-numeric: tabular-nums; }
.post .p-body .tag { font-size: 11px; }
.post h4 {
  font-family: var(--font-sans); font-weight: 600; font-size: 25px; line-height: 1.18; letter-spacing: -0.02em;
  margin: 11px 0 0; color: var(--obsidian); transition: color var(--dur-fast) var(--ease-out); text-wrap: balance;
}
.post .excerpt { font-size: 15.5px; line-height: 1.55; color: var(--fg-2); margin: 12px 0 0; max-width: 54ch; }
.post .meta { margin-top: 16px; }
.post .p-media { align-self: stretch; }
.post .p-media .plate { display: block; width: 100%; height: 100%; min-height: 132px; border-radius: var(--radius-3); }

/* ============== ARTICLE PAGE ============== */
.article { padding: 56px 0 0; }
.back-link {
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.08em;
  color: var(--fg-3); text-decoration: none; display: inline-flex; gap: 8px; align-items: center;
}
.back-link:hover { color: var(--obsidian); }

.article-head { max-width: 760px; margin: 0 auto; text-align: left; padding: 40px 40px 0; }
.article-head h1 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(34px, 5vw, 60px); line-height: 1.0; letter-spacing: -0.035em;
  margin: 18px 0 0; color: var(--obsidian); text-wrap: balance;
}
.article-head .deck {
  font-size: clamp(18px, 2vw, 22px); line-height: 1.5; color: var(--fg-2);
  margin: 22px 0 0; letter-spacing: -0.01em; text-wrap: pretty;
}
.byline {
  display: flex; align-items: center; gap: 14px; margin: 30px 0 0;
  padding: 24px 0; border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline);
}
.byline .avatar {
  width: 40px; height: 40px; border-radius: 999px; flex-shrink: 0;
  background: radial-gradient(120% 120% at 30% 20%, #2a2a30, #0c0c0e);
}
.byline .who { font-size: 14.5px; font-weight: 600; color: var(--obsidian); letter-spacing: -0.01em; }
.byline .when { font-family: var(--font-mono); font-size: 12.5px; color: var(--fg-3); margin-top: 3px; font-variant-numeric: tabular-nums; }
.byline .spacer { flex: 1; }
.byline .rt { font-family: var(--font-mono); font-size: 12.5px; color: var(--fg-3); }

.article-hero { margin: 40px auto 0; max-width: 1000px; padding: 0 40px; }
.article-hero .plate { border-radius: var(--radius-5); }
.figcap { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em; color: var(--fg-3); margin: 12px 2px 0; }

/* prose */
.prose { max-width: 720px; margin: 0 auto; padding: 56px 40px 0; }
.prose > * { margin: 0 0 28px; }
.prose p { font-size: 19px; line-height: 1.72; color: #2b2b31; letter-spacing: -0.003em; }
.prose .lede-p { font-size: 22px; line-height: 1.6; color: var(--obsidian); font-weight: 400; }
.prose h2 {
  font-family: var(--font-sans); font-weight: 600; font-size: 28px; line-height: 1.2; letter-spacing: -0.02em;
  color: var(--obsidian); margin: 56px 0 20px; text-wrap: balance;
}
.prose h3 {
  font-family: var(--font-sans); font-weight: 600; font-size: 21px; line-height: 1.3; letter-spacing: -0.015em;
  color: var(--obsidian); margin: 40px 0 14px;
}
.prose a:not(.read-link) { color: var(--riven); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.prose strong { font-weight: 600; color: var(--obsidian); }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { font-size: 19px; line-height: 1.7; color: #2b2b31; margin: 0 0 10px; padding-left: 6px; }
.prose li::marker { color: var(--riven); }

.prose figure { margin: 44px 0; }
.prose figure .plate { border-radius: var(--radius-4); }

/* data tables — instrument-grade: hairlines, mono numerals, no zebra slop */
.prose .table-wrap { margin: 36px 0; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.prose table {
  width: 100%; border-collapse: collapse;
  font-size: 15.5px; line-height: 1.45; color: #2b2b31;
  font-variant-numeric: tabular-nums;
}
.prose thead th {
  text-align: left; vertical-align: bottom;
  font-family: var(--font-mono); font-weight: 500;
  font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--fg-3);
  padding: 0 18px 12px 0; border-bottom: 1px solid var(--obsidian);
}
.prose tbody td {
  padding: 13px 18px 13px 0; border-bottom: 1px solid var(--hairline);
  vertical-align: top;
}
.prose tbody tr:last-child td { border-bottom: 0; }
.prose th:last-child, .prose td:last-child { padding-right: 0; }
.prose td strong { color: var(--obsidian); }
@media (max-width: 600px) { .prose table { font-size: 14px; } }

/* pull quote — large, no left-border trope */
.prose blockquote {
  margin: 48px 0; padding: 0; border: 0;
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(24px, 3vw, 32px); line-height: 1.22; letter-spacing: -0.025em;
  color: var(--obsidian); text-wrap: balance;
}
.prose blockquote cite {
  display: block; margin-top: 16px; font-family: var(--font-mono); font-style: normal;
  font-size: 12.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg-3);
}

/* data callout — instrument feel, mono numerals */
.statband {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  margin: 48px 0; padding: 32px 0; border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline);
}
.statband .stat .v {
  font-family: var(--font-mono); font-weight: 500; font-size: 40px; letter-spacing: -0.03em;
  color: var(--obsidian); font-variant-numeric: tabular-nums; line-height: 1;
}
.statband .stat .v .accent { color: var(--riven); }
.statband .stat .l {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--fg-3); margin-top: 10px; line-height: 1.4;
}

/* article footer: author + next */
.article-foot { max-width: 720px; margin: 64px auto 0; padding: 0 40px; }
.author-card {
  display: flex; gap: 18px; align-items: flex-start;
  padding: 32px 0; border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline);
}
.author-card .avatar { width: 52px; height: 52px; }
.author-card .ab-name { font-weight: 600; font-size: 16px; color: var(--obsidian); letter-spacing: -0.01em; }
.author-card .ab-bio { font-size: 15px; line-height: 1.55; color: var(--fg-2); margin-top: 6px; max-width: 54ch; }

.next-read {
  display: block; margin-top: 32px; padding: 32px; border-radius: var(--radius-5);
  background: var(--obsidian); color: var(--white); text-decoration: none;
  transition: transform var(--dur-med) var(--ease-out);
}
.next-read:hover { transform: translateY(-2px); }
.next-read .nl { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--fog); }
.next-read .nt { font-family: var(--font-sans); font-weight: 600; font-size: 24px; line-height: 1.15; letter-spacing: -0.02em; margin-top: 12px; color: var(--white); text-wrap: balance; }
.next-read .nt .accent { color: var(--riven-ember); }

/* ============== NEWSLETTER ============== */
.signup {
  display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center;
  margin: 88px 0 0; padding: 44px 0; border-top: 1px solid var(--hairline);
}
.signup-copy h3 {
  font-family: var(--font-display); font-weight: 700; font-size: 32px; letter-spacing: -0.03em;
  color: var(--obsidian); margin: 16px 0 0;
}
.signup-copy p { font-size: 16px; line-height: 1.55; color: var(--fg-2); margin: 10px 0 0; max-width: 42ch; }
.signup-form { display: flex; gap: 10px; }
.signup-form input {
  font-family: var(--font-sans); font-size: 15px; color: var(--obsidian);
  background: var(--white); border: 1px solid var(--linen); border-radius: var(--radius-3);
  padding: 14px 16px; width: 248px; outline: none;
  transition: border-color var(--dur-fast) var(--ease-out);
}
.signup-form input:focus { border-color: var(--riven); }
.signup-form input::placeholder { color: var(--fg-3); }
.signup-form button {
  font-family: var(--font-sans); font-size: 15px; font-weight: 600; letter-spacing: -0.01em;
  color: var(--white); background: var(--obsidian); border: 0; border-radius: var(--radius-3);
  padding: 14px 24px; cursor: pointer; white-space: nowrap;
  transition: background var(--dur-fast) var(--ease-out);
}
.signup-form button:hover { background: var(--riven); }

/* ============== FOOTER (matches landing page exactly) ============== */
.site-foot { margin-top: 112px; background: var(--obsidian); }
.footer {
  max-width: 1160px; margin: 0 auto;
  padding: 24px 40px;
  display: flex; align-items: center; justify-content: space-between;
  border-top: 1px solid var(--hairline-dark);
}
.footer .col {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--steel);
}
.footer .col.mid { display: flex; gap: 24px; }
.footer a { color: inherit; text-decoration: none; opacity: 0.8; }
.footer a:hover { opacity: 1; color: #fff; }
@media (max-width: 600px) {
  .footer { flex-direction: column; gap: 16px; text-align: center; padding: 28px 22px; }
}

/* ============== RESPONSIVE ============== */
@media (max-width: 920px) {
  .wrap, .bnav-inner { padding-left: 28px; padding-right: 28px; }
  .featured { grid-template-columns: 1fr; gap: 28px; }
  .featured .f-media { order: 1; }
  .featured .f-body { order: 2; }
  .post { grid-template-columns: 40px 1fr; }
  .post .p-media { display: none; }
}
@media (max-width: 600px) {
  .bnav-nav { gap: 18px; }
  .bnav-nav a { font-size: 14px; }
  .as-badge .ascopy { display: none; }
  .as-badge { padding: 9px; border-radius: 10px; }
  .wrap, .bnav-inner, .prose, .article-head, .article-hero, .article-foot { padding-left: 22px; padding-right: 22px; }
  .post { grid-template-columns: 1fr; gap: 4px; }
  .post .num { display: none; }
  .statband { grid-template-columns: 1fr; gap: 20px; text-align: left; }
  /* Newsletter stacks; form goes full-width (was overflowing) */
  .signup { grid-template-columns: 1fr; gap: 22px; padding: 36px 0; }
  .signup-form { flex-direction: column; align-items: stretch; }
  .signup-form input { width: 100%; }
  .signup-form button { width: 100%; }
  .masthead h1 { font-size: clamp(38px, 11vw, 52px); }
  .masthead { padding-top: 64px; }
}