/* RAMA G7 Club — Editorial site stylesheet
   Direction: editorial magazine, not tech startup.
   Author: Smart, RAMA G7 */

:root {
  /* Palette */
  --ink:         #030F27;
  --paper:       #F4EFE6;
  --paper-warm:  #EDE6D6;
  --white:       #FFFFFF;
  --accent:      #14B59D;       /* logo teal, decorative use only */
  --accent-deep: #0E8A78;       /* legible on paper for links */
  --rule:        #DCD4C2;
  --muted:       #5C6675;
  --muted-soft:  #9AA0AB;
  --shadow-sm:   0 1px 0 rgba(3, 15, 39, 0.06);

  /* Type */
  --font-display: "Trirong", Georgia, serif;
  --font-body:    "Trirong", Georgia, serif;
  --font-ui:      "IBM Plex Sans Thai Looped", system-ui, sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, monospace;

  /* Spacing scale, modular */
  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.5rem;
  --s-6: 2rem;
  --s-7: 3rem;
  --s-8: 4rem;
  --s-9: 6rem;

  /* Layout */
  --content-max: 68ch;
  --page-max: 1180px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.65;
  font-feature-settings: "kern", "liga", "onum";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
  min-height: 100vh;
}

/* Subtle paper grain. Layered as a fixed pseudo-element. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.01 0 0 0 0 0.06 0 0 0 0 0.16 0 0 0 0.05 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  z-index: 1;
}

main, header, footer { position: relative; z-index: 2; }

/* ---------- Typography ---------- */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.15;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); margin-bottom: var(--s-5); }
h2 { font-size: 1.75rem; margin-top: var(--s-7); margin-bottom: var(--s-4); }
h3 { font-size: 1.25rem; margin-top: var(--s-6); margin-bottom: var(--s-3); }

p { margin-bottom: var(--s-4); }
p + p { text-indent: 1.25em; margin-top: 0; }
.lede + p, h1 + p, h2 + p, h3 + p, blockquote + p { text-indent: 0; }

a {
  color: var(--accent-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(14, 138, 120, 0.35);
  transition: border-color 120ms ease, color 120ms ease;
}
a:hover { color: var(--ink); border-bottom-color: var(--ink); }

strong { font-weight: 600; }
em { font-style: italic; }

blockquote {
  margin: var(--s-6) var(--s-5);
  padding-left: var(--s-4);
  border-left: 2px solid var(--accent);
  font-style: italic;
  color: var(--ink);
}

code, pre {
  font-family: var(--font-mono);
  font-size: 0.92em;
}
code {
  background: var(--paper-warm);
  padding: 0.1em 0.3em;
  border-radius: 2px;
}
pre {
  background: var(--ink);
  color: var(--paper);
  padding: var(--s-4);
  overflow-x: auto;
  margin: var(--s-5) 0;
  font-size: 0.85em;
}

hr {
  border: 0;
  height: 1px;
  background: var(--rule);
  margin: var(--s-7) 0;
}

ul, ol { margin: var(--s-4) 0 var(--s-4) var(--s-6); }
li { margin-bottom: var(--s-2); }

/* Small caps utility, for metadata */
.smallcaps {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- Masthead ---------- */

.masthead {
  background: var(--ink);
  color: var(--paper);
  padding: var(--s-6) var(--s-5) var(--s-5);
  border-bottom: 1px solid var(--accent);
}

.masthead-inner {
  max-width: var(--page-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--s-5);
  align-items: center;
}

.masthead-mark {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  text-decoration: none;
  border: 0;
}

.masthead-mark img {
  height: 44px;
  width: auto;
  display: block;
}

.masthead-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.masthead-title .accent { color: var(--accent); }

.masthead-tagline {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-soft);
  text-align: center;
  border-bottom: 0;
}

nav.masthead-nav {
  display: flex;
  gap: var(--s-5);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

nav.masthead-nav a {
  color: var(--paper);
  border-bottom: 0;
  opacity: 0.85;
}
nav.masthead-nav a:hover { color: var(--accent); opacity: 1; }
nav.masthead-nav a.active { color: var(--accent); opacity: 1; }

/* ---------- Layout containers ---------- */

main { padding: var(--s-7) var(--s-5) var(--s-9); }

.page {
  max-width: var(--page-max);
  margin: 0 auto;
}

.article {
  max-width: var(--content-max);
  margin: 0 auto;
}

/* ---------- Index page (post list) ---------- */

.intro {
  max-width: var(--content-max);
  margin: 0 auto var(--s-9);
  text-align: left;
}

.intro h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: var(--s-4);
}

.intro .lede {
  font-size: 1.25rem;
  line-height: 1.55;
  color: var(--muted);
}

.section-rule {
  display: flex;
  align-items: center;
  gap: var(--s-4);
  max-width: var(--content-max);
  margin: 0 auto var(--s-6);
}

.section-rule .label {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
}

.section-rule .line {
  flex: 1;
  height: 1px;
  background: var(--rule);
}

.post-list {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.post-card {
  display: grid;
  grid-template-columns: 7ch 1fr;
  gap: var(--s-5);
  padding: var(--s-5) 0;
  border-top: 1px solid var(--rule);
  text-decoration: none;
  border-bottom: 0;
  color: var(--ink);
  transition: background-color 160ms ease;
}
.post-card:last-child { border-bottom: 1px solid var(--rule); }
.post-card:hover { background: rgba(20, 181, 157, 0.04); }
.post-card:hover .post-card-title { color: var(--accent-deep); }

.post-card-num {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--muted-soft);
  padding-top: 0.4em;
}

.post-card-meta {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--s-2);
}

.post-card-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--s-2);
  transition: color 120ms ease;
}

.post-card-summary {
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.55;
}

.post-card-author {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-top: var(--s-2);
}

/* ---------- Article page ---------- */

.article-header {
  max-width: var(--content-max);
  margin: 0 auto var(--s-7);
  border-bottom: 1px solid var(--rule);
  padding-bottom: var(--s-5);
}

.article-meta {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--s-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-4);
}

.article-meta .dot {
  color: var(--muted-soft);
}

.article-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.1;
  margin-bottom: var(--s-4);
}

.article-lede {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--muted);
  font-family: var(--font-display);
  font-style: italic;
}

.article-byline {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--ink);
  margin-top: var(--s-4);
}

.article-byline .author-name {
  font-weight: 600;
}

.article-body { font-size: 1.075rem; line-height: 1.7; }
.article-body h2 {
  font-size: 1.6rem;
  border-top: 1px solid var(--rule);
  padding-top: var(--s-6);
  margin-top: var(--s-7);
}
.article-body img { max-width: 100%; height: auto; margin: var(--s-5) 0; }

/* References block, Vancouver style */
.references {
  max-width: var(--content-max);
  margin: var(--s-8) auto var(--s-7);
  padding-top: var(--s-5);
  border-top: 2px solid var(--ink);
  font-size: 0.9rem;
  line-height: 1.55;
}

.references h3 {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: var(--s-4);
}

.references ol {
  margin-left: var(--s-5);
  font-family: var(--font-body);
}
.references li { margin-bottom: var(--s-3); color: var(--muted); }
.references li::marker { color: var(--ink); font-weight: 600; }

/* Inline citation pills, the [1], [2] in body text */
sup.cite {
  font-size: 0.7em;
  line-height: 0;
  vertical-align: super;
}
sup.cite a {
  border-bottom: 0;
  color: var(--accent-deep);
  font-weight: 600;
  padding: 0 0.15em;
}
sup.cite a:hover { color: var(--ink); }

/* ---------- About / static pages ---------- */

.static-page {
  max-width: var(--content-max);
  margin: 0 auto;
}
.static-page h1 { margin-bottom: var(--s-6); }

/* ---------- Footer ---------- */

footer {
  background: var(--ink);
  color: var(--muted-soft);
  padding: var(--s-7) var(--s-5);
  margin-top: var(--s-9);
  font-size: 0.88rem;
  font-family: var(--font-ui);
}

footer .footer-inner {
  max-width: var(--page-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-6);
  align-items: start;
}

footer h4 {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--paper);
  font-weight: 500;
  margin-bottom: var(--s-3);
}

footer a {
  color: var(--muted-soft);
  border-bottom: 0;
  display: block;
  margin-bottom: var(--s-2);
}
footer a:hover { color: var(--accent); }

footer .footer-meta {
  margin-top: var(--s-6);
  padding-top: var(--s-5);
  border-top: 1px solid rgba(244, 239, 230, 0.1);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-align: center;
  max-width: var(--page-max);
  margin-left: auto;
  margin-right: auto;
  color: var(--muted-soft);
}

/* ---------- Mobile ---------- */

@media (max-width: 720px) {
  body { font-size: 17px; }
  main { padding: var(--s-5) var(--s-4) var(--s-7); }

  .masthead { padding: var(--s-4) var(--s-4) var(--s-3); }
  .masthead-inner {
    grid-template-columns: 1fr;
    gap: var(--s-3);
    text-align: center;
  }
  .masthead-mark { justify-self: center; }
  .masthead-tagline { display: none; }
  nav.masthead-nav {
    justify-content: center;
    gap: var(--s-4);
    flex-wrap: wrap;
    font-size: 0.78rem;
  }

  .post-card { grid-template-columns: 4ch 1fr; gap: var(--s-3); }
  .post-card-title { font-size: 1.25rem; }

  footer .footer-inner { grid-template-columns: 1fr; gap: var(--s-5); }
}

/* ---------- Subtle entrance animation ---------- */

.fade-up {
  opacity: 0;
  transform: translateY(8px);
  animation: fadeUp 480ms cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
}
.fade-up:nth-child(2) { animation-delay: 60ms; }
.fade-up:nth-child(3) { animation-delay: 120ms; }
.fade-up:nth-child(4) { animation-delay: 180ms; }
.fade-up:nth-child(5) { animation-delay: 240ms; }
.fade-up:nth-child(6) { animation-delay: 300ms; }

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .fade-up { animation: none; opacity: 1; transform: none; }
}