/* ============================================================
   Dr. Shaurya Singh — Research Portfolio
   Editorial, data-forward stylesheet. No framework.
   ============================================================ */

:root {
  --ink: #1a1a18;
  --ink-soft: #4a4944;
  --muted: #7a786f;
  --paper: #faf8f4;
  --paper-raised: #ffffff;
  --border: #e2ded4;
  --border-strong: #cfc9ba;
  --accent: #7a3623;
  --accent-soft: #f2e6de;
  --accent-ink: #5f2a1b;
  --good: #3e5c3a;
  --bad: #8a3a2a;
  --neutral: #6a6558;

  --serif: "Newsreader", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --content-width: 760px;
  --wide-width: 920px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-ink);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

img {
  max-width: 100%;
}

/* ---------- layout shells ---------- */

.wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px;
}

.wrap--wide {
  max-width: var(--wide-width);
}

section {
  padding: 56px 0;
  border-bottom: 1px solid var(--border);
}

section:last-of-type {
  border-bottom: none;
}

/* ---------- header / nav ---------- */

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 22px 0;
}

.site-header .wrap {
  max-width: var(--wide-width);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 28px;
}

.brand {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.brand span {
  display: block;
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 2px;
}

.site-nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.site-nav a {
  font-size: 0.92rem;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--accent);
}

/* ---------- typography ---------- */

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.2;
  color: var(--ink);
}

h1 {
  font-size: clamp(2.1rem, 4.2vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
}

h2 {
  font-size: 1.6rem;
  margin: 0 0 18px;
}

h3 {
  font-size: 1.15rem;
  font-style: italic;
  margin: 0 0 10px;
  color: var(--ink);
}

p {
  margin: 0 0 16px;
}

.lede {
  font-size: 1.2rem;
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0 0 32px;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-ink);
  margin: 0 0 14px;
}

.section-intro {
  font-size: 1.08rem;
  color: var(--ink-soft);
  max-width: 640px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
}

code, .mono {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--accent-soft);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  color: var(--accent-ink);
}

.verdict {
  background: var(--paper-raised);
  border: 1px solid var(--border-strong);
  border-left: 3px solid var(--accent);
  padding: 20px 24px;
  margin: 24px 0;
  font-size: 1.02rem;
}

.verdict strong {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 8px;
  color: var(--accent-ink);
}

/* ---------- badges ---------- */

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.badge {
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--ink-soft);
  background: var(--paper-raised);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 8px 14px;
  max-width: 320px;
}

.badge--accent {
  border-color: var(--accent);
  color: var(--accent-ink);
  background: var(--accent-soft);
}

/* ---------- lists ---------- */

ul.plain {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

ul.plain li {
  position: relative;
  padding: 0 0 14px 22px;
}

ul.plain li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ---------- tables ---------- */

.table-scroll {
  overflow-x: auto;
  margin: 20px 0 8px;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
  background: var(--paper-raised);
  min-width: 480px;
}

th, td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

thead th {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--paper);
  border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
}

tbody tr:last-child td {
  border-bottom: none;
}

td.num {
  font-family: var(--mono);
  font-weight: 500;
}

.outcome-flag {
  font-family: var(--mono);
  font-size: 0.78rem;
}

caption, .table-caption {
  caption-side: bottom;
  text-align: left;
  font-size: 0.88rem;
  color: var(--muted);
  padding: 10px 2px 0;
  max-width: 640px;
}

/* ---------- case study stages ---------- */

.stage {
  margin: 0 0 40px;
}

.stage-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-ink);
  margin: 0 0 8px;
}

.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 18px 0;
}

.stat {
  font-family: var(--mono);
  background: var(--paper-raised);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 12px 16px;
  min-width: 140px;
}

.stat .n {
  display: block;
  font-size: 1.3rem;
  color: var(--accent-ink);
  font-weight: 500;
}

.stat .label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 4px;
}

/* ---------- links as CTAs ---------- */

.more-link {
  display: inline-block;
  font-size: 0.98rem;
  font-weight: 500;
  margin-top: 6px;
}

/* ---------- ongoing / exploratory flag ---------- */

.flag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--neutral);
  border: 1px solid var(--border-strong);
  border-radius: 3px;
  padding: 4px 9px;
  margin-bottom: 16px;
}

.exploratory-item {
  margin-bottom: 28px;
}

.exploratory-item:last-child {
  margin-bottom: 0;
}

/* ---------- footer ---------- */

.site-footer {
  padding: 40px 0 60px;
}

.site-footer .wrap {
  max-width: var(--wide-width);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--muted);
}

.site-footer a {
  color: var(--muted);
}

/* ---------- page-level ---------- */

.page-header {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  margin-bottom: 12px;
}

.page-header .lede {
  margin-bottom: 0;
}

.hero {
  padding-top: 64px;
}

/* ---------- responsive ---------- */

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }
  section {
    padding: 40px 0;
  }
  .hero {
    padding-top: 44px;
  }
  h1 {
    font-size: 2rem;
  }
  .badge {
    max-width: 100%;
  }
  th, td {
    padding: 10px 12px;
  }
}