/* ===== TABES – Project Page Styles ===== */

:root {
  --bg: #f7f2e8;
  --bg-alt: #fffbf3;
  --ink: #1f2f2a;
  --muted: #42534d;
  --accent: #d64d2f;
  --accent-soft: #ffe2d8;
  --teal: #0f6c62;
  --teal-soft: #d7f2ee;
  --line: #dccfb9;
  --shadow: 0 18px 44px rgba(31, 47, 42, 0.08);
  --code-bg: #f6fffd;
  --code-border: #cfe3df;
  --code-text: #214840;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  min-height: 100vh;
  font-family: "Literata", Georgia, serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 2%, #fff7eb 0%, transparent 42%),
    radial-gradient(circle at 95% 12%, #e0f5f1 0%, transparent 38%),
    linear-gradient(180deg, var(--bg) 0%, #f2ecdf 100%);
  line-height: 1.7;
  position: relative;
}

/* subtle grain overlay */
.grain {
  position: fixed; inset: 0;
  pointer-events: none; opacity: 0.22;
  background-image: radial-gradient(circle at 1px 1px, rgba(31,47,42,0.13) 1px, transparent 0);
  background-size: 3px 3px;
  mix-blend-mode: multiply; z-index: 0;
}

/* ===== Layout ===== */
.shell {
  width: min(1080px, calc(100% - 2.2rem));
  margin: 0 auto;
  position: relative; z-index: 1;
}

/* ===== Header ===== */
.site-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1.1rem 0;
  border-bottom: 1px solid rgba(220,207,185,0.75);
  backdrop-filter: blur(5px);
}

.brand {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700; letter-spacing: 0.05em;
  color: var(--ink); text-decoration: none;
  font-size: 1.1rem;
}

nav { display: flex; gap: 1rem; }

nav a {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.95rem; color: var(--muted);
  text-decoration: none; padding-bottom: 0.15rem;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

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

/* ===== Main ===== */
main { padding: 2.2rem 0 3rem; }

section, article > section, .hero {
  margin-bottom: 2rem;
  animation: rise 0.66s ease both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0);   }
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(140deg, #fffdf8 0%, #fff5e9 50%, #f2fffb 100%);
  border: 1px solid var(--line);
  border-radius: 22px; padding: 2rem;
  box-shadow: var(--shadow);
}

.kicker {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.84rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--teal);
}

/* ===== Typography ===== */
h1, h2, h3 {
  font-family: "Space Grotesk", sans-serif;
  line-height: 1.2; margin: 0.55rem 0 0.65rem;
}
h1 { font-size: clamp(1.65rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.3rem, 2.3vw, 1.85rem); }
h3 { font-size: 1.06rem; }

p, li { color: var(--muted); margin: 0.45rem 0; }
strong { color: var(--ink); }

/* ===== Authors ===== */
.authors {
  display: flex; flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
  margin: 0.8rem 0 0.2rem;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
}

.authors span { white-space: nowrap; }
.authors sup { font-size: 0.65em; color: var(--teal); margin-left: 1px; }

.affiliations {
  font-size: 0.88rem; color: var(--muted);
  font-family: "Space Grotesk", sans-serif;
  margin: 0 0 1rem;
}

.affiliations sup { font-size: 0.7em; color: var(--teal); margin-right: 2px; }

/* ===== Buttons ===== */
.button-row {
  display: flex; flex-wrap: wrap;
  gap: 0.72rem; margin-top: 1.15rem;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.68rem 1.15rem;
  border-radius: 999px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.93rem; text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  font-weight: 500;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #b74028; }

.btn-ghost { color: var(--teal); border-color: #99d5cc; background: #f2fffb; }
.btn-ghost:hover { background: var(--teal-soft); }

.btn-muted {
  color: #5f5f5f; border-color: #d4d4d4;
  background: #efefef; cursor: not-allowed;
}

/* ===== Cards ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.95rem;
}

.card {
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: 16px; padding: 1.15rem;
  transition: box-shadow 0.25s, transform 0.25s;
}

.card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.card .card-icon {
  font-size: 1.6rem; margin-bottom: 0.3rem;
  display: block;
}

/* ===== Figures ===== */
figure {
  margin: 0; padding: 0;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: 16px; overflow: hidden;
}

figure img, figure svg {
  display: block; width: 100%; height: auto;
}

figcaption {
  padding: 0.8rem 1rem 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.92rem; color: #52615c;
  line-height: 1.5;
}

/* ===== Blog layout ===== */
.blog-layout article {
  background: rgba(255, 253, 248, 0.88);
  border: 1px solid var(--line);
  border-radius: 20px; padding: 1.5rem;
  box-shadow: var(--shadow);
}

ul, ol { margin: 0.55rem 0 0.7rem; padding-left: 1.3rem; }
li { margin-bottom: 0.3rem; }

/* ===== Math / Formula blocks ===== */
.formula, .math-block {
  background: linear-gradient(115deg, var(--accent-soft), #fff7f4);
  border: 1px solid #efc3b4;
  border-radius: 14px; padding: 1rem 1.1rem;
  margin: 1rem 0;
  overflow-x: auto;
}

.formula code, .math-block code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: #7f2f1d; font-size: 0.9rem; word-break: break-word;
}

/* ===== Algorithm block ===== */
.algorithm-block {
  background: linear-gradient(135deg, #f0faf8, #f8fdf5);
  border: 2px solid var(--teal);
  border-radius: 16px; padding: 1.2rem;
  margin: 1rem 0;
}

.algorithm-block h4 {
  font-family: "Space Grotesk", sans-serif;
  color: var(--teal); margin: 0 0 0.6rem;
  font-size: 1rem;
}

.algorithm-block ol {
  padding-left: 1.5rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88rem;
  color: var(--ink);
}

.algorithm-block ol li { margin-bottom: 0.35rem; }

/* ===== Insight / Callout boxes ===== */
.insight-box {
  background: linear-gradient(130deg, var(--teal-soft), #edfff9);
  border-left: 4px solid var(--teal);
  border-radius: 0 14px 14px 0;
  padding: 1rem 1.2rem;
  margin: 1rem 0;
}

.insight-box strong { color: var(--teal); }

.warning-box {
  background: linear-gradient(130deg, #fff8f0, #fff3e6);
  border-left: 4px solid #e8872d;
  border-radius: 0 14px 14px 0;
  padding: 1rem 1.2rem;
  margin: 1rem 0;
}

/* ===== Results table ===== */
.results-table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
  border-radius: 14px;
  border: 1px solid var(--line);
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.88rem;
}

.results-table th {
  background: var(--teal);
  color: #fff;
  padding: 0.7rem 0.8rem;
  text-align: center;
  font-weight: 600;
  white-space: nowrap;
}

.results-table td {
  padding: 0.55rem 0.8rem;
  text-align: center;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.results-table tr:nth-child(even) td { background: rgba(15,108,98,0.03); }

.results-table tr:last-child td {
  background: var(--accent-soft);
  color: var(--ink);
  font-weight: 600;
}

/* ===== Comparison columns ===== */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1rem 0;
}

.comparison-col {
  border-radius: 14px;
  border: 1px solid var(--line);
  padding: 1rem;
  background: var(--bg-alt);
}

.comparison-col h4 {
  font-family: "Space Grotesk", sans-serif;
  margin: 0 0 0.5rem;
}

.comparison-col.bad { border-color: #e8a895; background: #fff8f5; }
.comparison-col.good { border-color: #8ecfc4; background: #f0fdfb; }

/* ===== Numbered steps ===== */
.steps-list {
  counter-reset: steps;
  list-style: none;
  padding: 0;
}

.steps-list li {
  counter-increment: steps;
  display: flex;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
  align-items: flex-start;
}

.steps-list li::before {
  content: counter(steps);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.8rem;
  height: 1.8rem;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--teal);
  color: #fff;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
}

/* ===== Footer ===== */
.site-footer {
  margin-top: 2rem; margin-bottom: 2rem;
  background: linear-gradient(130deg, #f3fdfb, #fff6ee);
  border: 1px solid var(--line);
  border-radius: 20px; padding: 1.3rem;
  box-shadow: var(--shadow);
}

pre {
  margin: 0.8rem 0; padding: 0.85rem;
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--code-border);
  background: var(--code-bg);
}

pre code {
  color: var(--code-text);
  font-size: 0.84rem; line-height: 1.5;
}

.footer-note { font-size: 0.9rem; }

a { color: var(--teal); transition: color 0.2s; }
a:hover { color: #0b4f48; }

/* ===== Tag / badge row ===== */
.tag-row {
  display: flex; flex-wrap: wrap; gap: 0.4rem;
  margin: 0.6rem 0;
}

.tag {
  display: inline-flex;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.78rem; font-weight: 500;
  background: var(--teal-soft);
  color: var(--teal);
  border: 1px solid rgba(15,108,98,0.2);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .card-grid { grid-template-columns: 1fr; }
  .comparison-grid { grid-template-columns: 1fr; }
  nav { gap: 0.65rem; }
}

@media (max-width: 680px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .hero, .blog-layout article, .site-footer {
    border-radius: 16px; padding: 1rem;
  }
  main { padding-top: 1.3rem; }
}