/*
  meristats, a testing and results framework for the Meridian chess engine
  Copyright (C) 2026 Syed Taha

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

/* meristats stylesheet. The palette and type follow syedtaha22.github.io. */

:root {
  --paper: #faf9f6;
  --card: #ffffff;
  --ink: #16181c;
  --ink-soft: #4d4f56;
  --muted: #8b8d94;
  --rule: #e4e1d8;
  --accent: #24406f;
  --accent-ink: #16233d;
  --accent-tint: #eef1f6;
  --on-ink: #ffffff;
  --on-accent: #ffffff;
  --shadow: 0 1px 2px rgba(20, 24, 34, 0.04), 0 8px 24px rgba(20, 24, 34, 0.06);

  --sans: "Bricolage Grotesque", "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --wrap: 1320px;
  color-scheme: light;
}

html[data-theme="dark"] {
  --paper: #0d1117;
  --card: #151a21;
  --ink: #f4f5f7;
  --ink-soft: rgba(244, 245, 247, 0.75);
  --muted: rgba(244, 245, 247, 0.5);
  --rule: rgba(244, 245, 247, 0.16);
  --accent: #e44c65;
  --accent-ink: #e76278;
  --accent-tint: rgba(228, 76, 101, 0.14);
  --on-ink: #0d1117;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-optical-sizing: auto;
  font-size: 1.06rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-top: 3.4rem;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-ink); text-decoration: underline; text-decoration-thickness: 1px;
          text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 1.5rem; }

/* ---------------------------------------------------------------- theme */

.theme-toggle {
  position: fixed;
  top: 0.7rem;
  right: 1.5rem;
  z-index: 10;
  display: grid;
  place-items: center;
  width: 2.3rem;
  height: 2.3rem;
  padding: 0;
  border: 1px solid var(--rule);
  border-radius: 50%;
  background: var(--card);
  color: var(--ink-soft);
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.theme-toggle:hover {
  background: var(--accent-tint);
  color: var(--accent);
  border-color: var(--accent);
}
.theme-toggle .icon { grid-area: 1 / 1; width: 1.2rem; height: 1.2rem; }
html[data-theme="light"] .icon-sun,
html[data-theme="dark"] .icon-moon { display: none; }

/* ----------------------------------------------------------------- hero */

main { flex: 1; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 2rem;
  align-items: center;
  padding: 1.5rem 0 1rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
  font-weight: 700;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

h1, h2, h3 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink);
}
h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); margin: 0 0 0.7rem; font-weight: 800; }
h2 { font-size: 1.3rem; margin: 0 0 0.7rem; }
h3 { font-size: 1.1rem; margin: 0 0 0.4rem; }

.lede { max-width: 36rem; margin: 0 0 1.2rem; color: var(--ink-soft); font-size: 1.15rem; }

.actions { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.3rem;
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}
.btn:hover { text-decoration: none; }
.btn-fill { background: var(--ink); color: var(--on-ink); }
.btn-fill:hover { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn-outline { background: transparent; color: var(--ink); }
.btn-outline:hover { background: var(--ink); color: var(--on-ink); }

.emblem { display: grid; place-items: center; }
.emblem .mark { height: 13rem; width: auto; color: var(--accent); }

/* ------------------------------------------------------- status and cards */

.status {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin: 1rem 0 1.2rem;
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--rule);
  border-radius: 1rem;
  background: var(--card);
  box-shadow: var(--shadow);
}
.status-label {
  flex: none;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-tint);
  color: var(--accent);
  font: 500 0.75rem/1.2 var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.status p { margin: 0; font-weight: 600; }
.status .detail { margin-left: auto; color: var(--muted); font-weight: 400; font-size: 0.95rem; }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.9rem; }
.card {
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--rule);
  border-radius: 1rem;
  background: var(--card);
}
.card p { margin: 0; color: var(--ink-soft); font-size: 0.98rem; }
.card .num { margin-bottom: 0.5rem; color: var(--accent); font: 500 0.8rem/1 var(--mono); }

/* ---------------------------------------------------------------- page heads */

a.card { display: block; color: inherit; text-decoration: none; position: relative;
         transition: border-color 0.2s ease, transform 0.2s ease; }
a.card:hover { border-color: var(--accent); text-decoration: none; transform: translateY(-2px); }
.card-count { display: block; margin-top: 0.5rem; color: var(--muted); font: 500 0.78rem/1 var(--mono); }

.back {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.6rem;
  padding: 0.25rem 0.8rem 0.25rem 0.45rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.back svg { width: 1.1rem; height: 1.1rem; }
.back:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.page-head { padding: 0.9rem 0 0.6rem; }
.page-head h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); }
.page-head p { max-width: 44rem; margin: 0.3rem 0 0; color: var(--ink-soft); }
.page-head .eyebrow { margin-top: 0.8rem; margin-bottom: 0.4rem; }
section + section { margin-top: 1.4rem; }
.note { margin: 0.2rem 0 0.7rem; color: var(--muted); font-size: 0.88rem; max-width: 46rem; }

/* ----------------------------------------------------------------- panels */

.panel { border: 1px solid var(--rule); border-radius: 1rem; background: var(--card);
         box-shadow: var(--shadow); overflow: hidden; }

.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.8rem;
           padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--rule); }
.search { position: relative; flex: 1 1 14rem; max-width: 22rem; display: block; }
.search svg { position: absolute; left: 0.8rem; top: 50%; width: 1rem; height: 1rem;
              transform: translateY(-50%); color: var(--muted); pointer-events: none; }
.search input { width: 100%; padding: 0.4rem 0.8rem 0.4rem 2.2rem; border: 1px solid var(--rule);
                border-radius: 999px; background: var(--paper); color: var(--ink);
                font: inherit; font-size: 0.92rem; }
.search input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.sort { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--muted);
        font: 500 0.78rem/1 var(--mono); }
.sort select { max-width: 13rem; padding: 0.35rem 0.6rem; border: 1px solid var(--rule);
               border-radius: 999px; background: var(--paper); color: var(--ink); font: inherit;
               cursor: pointer; }
.chips { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.chip { padding: 0.28rem 0.75rem; border: 1px solid var(--rule); border-radius: 999px;
        background: transparent; color: var(--ink-soft); font: 500 0.78rem/1.3 var(--mono);
        cursor: pointer; transition: background-color 0.15s ease, color 0.15s ease; }
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.on { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.count { margin-left: auto; color: var(--muted); font: 500 0.78rem/1 var(--mono); }

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

.table-wrap { overflow-x: auto; }
table.results { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
table.results th, table.results td { padding: 0.5rem 0.9rem; text-align: left;
                                     border-bottom: 1px solid var(--rule); vertical-align: middle; }
table.results th.num, table.results td.num { text-align: right; }
table.results td { white-space: nowrap; }
table.results thead th { padding: 0.4rem 0.9rem; background: var(--paper); }
table.results th button { display: inline-flex; align-items: center; gap: 0.3rem; padding: 0;
                          border: 0; background: none; color: var(--muted); font: 700 0.72rem/1.2
                          var(--sans); letter-spacing: 0.07em; text-transform: uppercase; cursor: pointer; }
table.results th button:hover { color: var(--accent); }
table.results th .sort-icon { width: 0.55rem; height: 0.8rem; fill: currentColor; opacity: 0.35; }
table.results th .sort-icon path { transition: opacity 0.12s ease; }
table.results th[aria-sort] .sort-icon { opacity: 1; color: var(--accent); }
table.results th[aria-sort] .sort-icon path { opacity: 0.25; }
table.results th[aria-sort="ascending"] .sort-icon .up,
table.results th[aria-sort="descending"] .sort-icon .down { opacity: 1; }
table.results tbody tr { transition: background-color 0.12s ease; }
table.results tbody tr:hover { background: var(--accent-tint); }
table.results tbody tr:last-child td { border-bottom: 0; }
table.results td.num { font-family: var(--mono); font-size: 0.9rem; }
.main { display: block; font-weight: 600; }
td.num .main { font-weight: 500; }
.small { display: block; margin-top: 0.1rem; color: var(--muted); font: 400 0.76rem/1.3 var(--mono); }
.run-link { font-weight: 600; }
.empty { margin: 0; padding: 1.4rem; color: var(--muted); text-align: center; }
.pos { color: #1f7a4d; }
.neg { color: #b3392f; }
html[data-theme="dark"] .pos { color: #5bd399; }
html[data-theme="dark"] .neg { color: #ff7b72; }
.pill { display: inline-block; padding: 0.12rem 0.6rem; border-radius: 999px;
        font: 500 0.74rem/1.5 var(--mono); }
.pill.loud { background: var(--accent-tint); color: var(--accent); }
.pill.quiet { border: 1px solid var(--rule); color: var(--muted); }
.dot { display: inline-block; width: 0.55rem; height: 0.55rem; margin-right: 0.55rem;
       border-radius: 50%; background: var(--muted); vertical-align: 0.08em; }
.dot-verified { background: #1f7a4d; }
.dot-unverified { background: #c58a1d; }
.badge { display: inline-block; padding: 0.1rem 0.55rem; border-radius: 999px;
         font: 500 0.72rem/1.5 var(--mono); background: var(--accent-tint); color: var(--accent); }
.badge.warn { background: transparent; border: 1px solid var(--rule); color: var(--muted); }

.pager { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem;
         padding: 0.5rem 0.8rem; border-top: 1px solid var(--rule); }
.pager[hidden] { display: none; }
.per-page { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--muted);
            font: 500 0.78rem/1 var(--mono); }
.per-page select { padding: 0.3rem 0.6rem; border: 1px solid var(--rule); border-radius: 0.6rem;
                   background: var(--paper); color: var(--ink); font: inherit; cursor: pointer; }
.range { color: var(--muted); font: 500 0.78rem/1 var(--mono); }
.pages { display: flex; align-items: center; gap: 0.25rem; margin-left: auto; }
.pg { display: inline-grid; place-items: center; min-width: 1.8rem; height: 1.8rem; padding: 0 0.5rem; border: 1px solid var(--rule);
      border-radius: 0.6rem; background: transparent; color: var(--ink-soft);
      font: 500 0.82rem/1 var(--mono); cursor: pointer; }
.pg:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.pg.on { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.pg:disabled { opacity: 0.4; cursor: default; }
.gap { padding: 0 0.2rem; color: var(--muted); }

/* ------------------------------------------------------------ run details */

.runs { display: grid; gap: 0.4rem; }
details.run { border: 1px solid var(--rule); border-radius: 0.9rem; background: var(--card);
              transition: border-color 0.2s ease, box-shadow 0.2s ease; }
details.run[open] { border-color: var(--accent); box-shadow: var(--shadow); }
details.run.flash { animation: flash 1.4s ease; }
@keyframes flash { 0% { box-shadow: 0 0 0 3px var(--accent); } 100% { box-shadow: var(--shadow); } }
details.run > summary { display: flex; align-items: center; gap: 0.8rem; padding: 0.6rem 0.9rem;
                        cursor: pointer; list-style: none; }
details.run > summary::-webkit-details-marker { display: none; }
details.run > summary:hover .run-name { color: var(--accent); }
.run-name { flex: 1; min-width: 0; font-weight: 600; overflow-wrap: anywhere; }
.run-meta { flex: none; color: var(--muted); font: 400 0.8rem/1 var(--mono); }
.chev { display: block; flex: none; margin-left: auto; width: 1.1rem; height: 1.1rem;
        color: var(--muted);
        transition: transform 0.2s ease; }
details.run[open] .chev { transform: rotate(180deg); color: var(--accent); }
.run-body { padding: 0 0.9rem 0.7rem; animation: reveal 0.2s ease; }
@keyframes reveal { from { transform: translateY(-4px); } to { transform: none; } }
.to-top { display: inline-block; margin-top: 0.8rem; font-size: 0.85rem; }

table.facts { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
table.facts th, table.facts td { padding: 0.3rem 0.7rem; text-align: left; vertical-align: top;
                                 border-bottom: 1px solid var(--rule); }
table.facts tr.group th { padding: 0.6rem 0.7rem 0.25rem; border-bottom: 1px solid var(--rule);
                          color: var(--accent); font: 700 0.72rem/1.2 var(--sans);
                          letter-spacing: 0.08em; text-transform: uppercase; }
table.facts tbody:first-of-type tr.group th { padding-top: 0.3rem; }
table.facts th[scope="row"] { width: 11rem; color: var(--muted); font-weight: 500; }
table.facts td { font-family: var(--mono); font-size: 0.84rem; overflow-wrap: anywhere; }
table.grades td { font-family: var(--sans); font-size: 0.92rem; }
.wrap.narrow { max-width: 56rem; }
.protocol { max-width: none; }

/* ------------------------------------------------------------ site search */

.site-search { margin: 0 0 1.4rem; }
.search.big { max-width: none; }
.search.big input { padding: 0.65rem 1.1rem 0.65rem 2.6rem; font-size: 1rem; background: var(--card); }
.search.big svg { left: 1rem; width: 1.2rem; height: 1.2rem; }
.hits { margin: 0.8rem 0 0; padding: 0; list-style: none; border: 1px solid var(--rule);
        border-radius: 1rem; background: var(--card); overflow: hidden; }
.hits li a { display: flex; align-items: center; gap: 1rem; padding: 0.5rem 0.9rem; color: inherit;
             border-bottom: 1px solid var(--rule); text-decoration: none; }
.hits li:last-child a { border-bottom: 0; }
.hits li a:hover { background: var(--accent-tint); text-decoration: none; }
.hits .where { margin-left: auto; color: var(--muted); font: 400 0.78rem/1 var(--mono); }
.hits .what { font-weight: 600; }

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


.site-footer {
  margin-top: 2rem;
  padding: 1rem 0 1.4rem;
  border-top: 1px solid var(--rule);
  text-align: center;
  font: 400 0.8rem/1.6 var(--mono);
  color: var(--muted);
}
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--accent); }

/* ------------------------------------------------------------- small screens */

@media (max-width: 820px) {
  body { padding-top: 3.2rem; }
  .theme-toggle { top: 0.6rem; right: 1rem; }
  .wrap { padding: 0 1rem; }
  .hero { grid-template-columns: minmax(0, 1fr) auto; gap: 0 1rem; padding-top: 0.6rem; }
  .hero > div:first-child { display: contents; }
  .hero .eyebrow, .hero h1 { grid-column: 1; }
  .emblem { grid-column: 2; grid-row: 1 / span 2; justify-self: end; }
  .emblem .mark { height: 6.5rem; }
  .hero .lede, .hero .actions { grid-column: 1 / -1; }
  .card-grid { grid-template-columns: 1fr; }
  .status { flex-wrap: wrap; }
  .status .detail { margin-left: 0; flex-basis: 100%; }
  .toolbar { gap: 0.5rem; }
  .search { max-width: none; flex: 1 1 8rem; }
  .sort select { max-width: 9rem; }
  .count { margin-left: auto; }
  .pager { flex-wrap: nowrap; justify-content: space-between; }
  .range, .gap, .pg:not(.on):not(.step) { display: none; }
  .pages { margin-left: 0; flex-basis: auto; }
  table.facts th[scope="row"] { width: 7rem; }
  .run-meta { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}