/* IOPS Hackathon — clean white theme (matches project-p) */

:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted-bg: #f5f5f5;
  --muted-fg: #737373;
  --border: #e5e5e5;
  --border-strong: #d4d4d4;
  --primary: #1a73e8;
  --primary-hover: #1761c2;
  --primary-fg: #ffffff;
  --accent-bg: #f0f4ff;
  --accent-fg: #1a56db;
  --success-bg: #ecfdf5;
  --success-fg: #047857;
  --warning-bg: #fffbeb;
  --warning-fg: #b45309;
  --danger-bg: #fef2f2;
  --danger-fg: #b91c1c;
  --radius: 0.5rem;
  --radius-sm: 0.375rem;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.06);
}

* { box-sizing: border-box; }

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap");

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

body {
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--primary);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

code, .mono, pre {
  font-family: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
}

code {
  background: var(--muted-bg);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.9em;
}

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

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
header h1 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
header h1 a {
  color: var(--fg);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
header h1 a:hover { text-decoration: none; color: var(--primary); }
.brand-logo {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  display: block;
}
.brand-text em {
  font-style: normal;
  color: var(--muted-fg);
  font-weight: 500;
  margin-left: 2px;
}
.competition-chip {
  display: inline-flex;
  align-items: center;
  margin-left: 14px;
  padding: 2px 10px;
  background: var(--accent-bg);
  color: var(--accent-fg);
  border: 1px solid #c7d7fe;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}
header h1 { display: inline-flex; align-items: center; }

label.inline-checkbox {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 12px;
  font-weight: 500;
  font-size: 13px;
}
label.inline-checkbox input[type=checkbox] {
  display: inline-block;
  width: auto;
  margin: 0;
}

form.inline-mini { display: inline-flex; align-items: center; gap: 4px; flex-wrap: wrap; }
form.inline-mini input { display: inline-block; padding: 3px 6px; margin: 0; max-width: none; font-size: 12px; }
form.inline-mini input[type="file"] { max-width: 180px; font-size: 11px; padding: 0; }
form.inline-mini input[type="file"]::file-selector-button {
  border: 1px solid var(--border); background: var(--bg); color: var(--fg);
  padding: 2px 8px; border-radius: 4px; font-size: 11px; cursor: pointer; margin-right: 4px;
}
form.inline-mini button { padding: 3px 8px; font-size: 12px; }

nav { display: flex; gap: 18px; align-items: center; }
nav a {
  color: var(--muted-fg);
  font-weight: 500;
  font-size: 14px;
}
nav a:hover { color: var(--fg); text-decoration: none; }
nav form.inline { display: inline; margin: 0; }
nav button.link {
  background: none;
  border: 0;
  color: var(--muted-fg);
  cursor: pointer;
  padding: 0;
  font: inherit;
  font-weight: 500;
}
nav button.link:hover { color: var(--fg); }

main {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 24px;
}

section {
  background: var(--bg);
  padding: 18px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
}
section h2 {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
}
section h2 a.small {
  font-size: 12px;
  font-weight: 500;
  color: var(--primary);
}
section h3 {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted-fg);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
th, td {
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th {
  color: var(--muted-fg);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--bg);
}
tbody tr:hover { background: var(--muted-bg); }

.muted { color: var(--muted-fg); }
.error { color: var(--danger-fg); }
.error-cell { color: var(--danger-fg); font-size: 12px; max-width: 280px; word-break: break-word; }

tr.rejected { color: var(--muted-fg); }
tr.verified strong { color: var(--success-fg); }

/* ----- forms ----- */

form label {
  display: block;
  margin-bottom: 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--fg);
}
form input,
form select {
  display: block;
  width: 100%;
  max-width: 380px;
  padding: 7px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--fg);
  border-radius: var(--radius-sm);
  font: inherit;
  margin-top: 4px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
form input:focus,
form select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.15);
}
form input[type=file] {
  background: var(--muted-bg);
  cursor: pointer;
}

form button,
button[type=submit] {
  padding: 7px 16px;
  background: var(--primary);
  color: var(--primary-fg);
  border: 1px solid var(--primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font: inherit;
  font-weight: 500;
  transition: background-color 0.15s, border-color 0.15s;
}
form button:hover { background: var(--primary-hover); border-color: var(--primary-hover); }

form button.danger {
  background: var(--danger-bg);
  color: var(--danger-fg);
  border-color: #fecaca;
}
form button.danger:hover { background: #fee2e2; border-color: #fca5a5; }

td.action-cell { white-space: nowrap; }
td.action-cell a.link {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 13px;
  color: var(--fg);
  margin-right: 6px;
}
td.action-cell a.link:hover {
  border-color: var(--primary);
  color: var(--primary);
  text-decoration: none;
}
td.action-cell form.inline { display: inline-block; }
td.action-cell form.inline + form.inline { margin-left: 6px; }

tr.editing { background: var(--accent-bg); }
tr.editing:hover { background: var(--accent-bg); }

.form-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.form-actions a.link {
  color: var(--muted-fg);
  font-weight: 500;
}
.form-actions a.link:hover { color: var(--fg); text-decoration: underline; }

/* ----- code blocks ----- */

pre {
  background: var(--muted-bg);
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-size: 12px;
  line-height: 1.45;
  color: var(--fg);
}

pre.token {
  background: var(--accent-bg);
  color: var(--accent-fg);
  border-color: #c7d7fe;
  user-select: all;
  word-break: break-all;
  white-space: pre-wrap;
  font-weight: 500;
}

.hint { color: var(--muted-fg); font-size: 12px; }

/* ----- inline banners ----- */

.notice {
  background: var(--success-bg);
  color: var(--success-fg);
  border: 1px solid #a7f3d0;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}
.warning {
  background: var(--warning-bg);
  color: var(--warning-fg);
  border: 1px solid #fcd34d;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}

/* ----- student upload cards ----- */

.upload-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.upload-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.upload-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}
.upload-card h3 {
  margin: 0 0 4px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
}
.upload-card input[type=file] {
  background: transparent;
  border: 0;
  padding: 0;
  margin: 10px 0;
  max-width: none;
  color: var(--fg);
  font-size: 12px;
}
.upload-card button {
  width: 100%;
}
.upload-card .card-link {
  display: inline-block;
  margin: 4px 0 6px;
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent-fg);
  background: var(--accent-bg);
  border: 1px solid #c7d7fe;
  border-radius: 4px;
  text-decoration: none;
}
.upload-card .card-link:hover {
  border-color: var(--primary);
  text-decoration: none;
}

/* ----- audit log ----- */

.small { font-size: 11px; color: var(--muted-fg); }
a.small { font-weight: 500; color: var(--primary); }

table.log td,
table.log th { padding: 6px 10px; font-size: 12px; }
table.log td.mono { font-size: 11.5px; color: var(--muted-fg); }
table.log td.mono.small { color: var(--muted-fg); }

td.timestamp, .timestamp {
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--muted-fg);
}

tr.log-warning { background: rgba(180, 83, 9, 0.04); }
tr.log-warning:hover { background: rgba(180, 83, 9, 0.08); }
tr.log-error   { background: rgba(185, 28, 28, 0.05); }
tr.log-error:hover { background: rgba(185, 28, 28, 0.09); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
}
.badge-info    { background: var(--accent-bg);  color: var(--accent-fg);  border-color: #c7d7fe; }
.badge-warning { background: var(--warning-bg); color: var(--warning-fg); border-color: #fcd34d; }
.badge-error   { background: var(--danger-bg);  color: var(--danger-fg);  border-color: #fecaca; }
.badge-pending  { background: var(--warning-bg); color: var(--warning-fg); border-color: #fcd34d; }
.badge-accepted { background: var(--success-bg); color: var(--success-fg); border-color: #a7f3d0; }
.badge-dismissed{ background: var(--muted-bg);   color: var(--muted-fg);   border-color: var(--border); }
.badge-rejected { background: var(--danger-bg);  color: var(--danger-fg);  border-color: #fecaca; }

.inline-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
}
.inline-filters label { margin-bottom: 0; min-width: 130px; }
.inline-filters a.link { color: var(--primary); align-self: center; font-weight: 500; }
.inline-filters a.link:hover { text-decoration: underline; }

.pager {
  display: flex;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.pager a { color: var(--primary); font-weight: 500; }
.pager a:hover { text-decoration: underline; }

/* ----- tabs ----- */

.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin: -4px -4px 0;
}
.tabs .tab {
  padding: 8px 16px;
  color: var(--muted-fg);
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  margin-bottom: -1px;
  font-weight: 600;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.15s, background-color 0.15s;
}
.tabs .tab:hover { color: var(--fg); text-decoration: none; background: var(--muted-bg); }
.tabs .tab.active {
  color: var(--fg);
  background: var(--bg);
  border-color: var(--border);
  border-bottom-color: var(--bg);
}
.tabs .tab.active:hover { background: var(--bg); }
.tabs .tab .count {
  background: var(--muted-bg);
  color: var(--muted-fg);
  font-size: 10.5px;
  font-weight: 600;
  padding: 1px 8px;
  border-radius: 999px;
}
.tabs .tab.active .count {
  background: var(--accent-bg);
  color: var(--accent-fg);
}

.tab-panel { margin-top: 14px; }

/* ----- /me totals cards ----- */
.totals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 10px;
  margin-top: 10px;
}
.totals-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.totals-card .totals-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted-fg);
  font-weight: 600;
}
.totals-card .totals-value {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
}
.totals-card .totals-sub {
  font-size: 11px;
  color: var(--muted-fg);
}
.totals-card .totals-sub.muted { font-style: italic; }
.current-bar.has-bar { font-weight: 600; color: var(--accent-fg); }
.totals-card:first-child {
  background: var(--accent-bg);
  border-color: #c7d7fe;
}
.totals-card:first-child .totals-value { color: var(--accent-fg); }

/* ----- countdown banner ----- */
#countdown {
  background: linear-gradient(90deg, var(--accent-bg), #ffffff);
  border-color: #c7d7fe;
}
#countdown.expired {
  background: var(--danger-bg);
  border-color: #fecaca;
}
#countdown.expired .countdown-clock,
#countdown.expired .countdown-label {
  color: var(--danger-fg);
}
.countdown {
  display: flex;
  align-items: baseline;
  gap: 16px;
}
.countdown-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted-fg);
}
.countdown-clock {
  font-family: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
  font-size: 22px;
  font-weight: 600;
  color: var(--accent-fg);
  font-variant-numeric: tabular-nums;
}

/* ----- animated leaderboard ----- */
table.leaderboard tbody tr {
  will-change: transform;
  transition: background-color 0.4s ease;
}
table.leaderboard tbody tr td.rank {
  font-weight: 700;
  color: var(--muted-fg);
  width: 48px;
  font-variant-numeric: tabular-nums;
}
table.leaderboard tbody tr.just-moved {
  background: rgba(26, 115, 232, 0.08);
}
table.leaderboard tbody tr.just-joined {
  background: rgba(22, 163, 74, 0.10);
}

/* ----- exploration plots ----- */
.plot-grid {
  display: grid;
  /* Default: 3 columns. The plot-grid-cols-N class overrides for 1 or 2. */
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 8px;
}
.plot-grid.plot-grid-cols-1 { grid-template-columns: 1fr; }
.plot-grid.plot-grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.plot-grid.plot-grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 980px) {
  .plot-grid.plot-grid-cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .plot-grid { grid-template-columns: 1fr; }
}
.plot-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px 8px;
  box-shadow: var(--shadow-sm);
  min-width: 0;          /* allow flex/grid to shrink so plots reflow */
}
.plot-card h3 {
  margin: 0 0 4px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--primary);
}
.plot-card h3 .muted {
  color: var(--muted-fg);
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
  font-size: 11px;
  margin-left: 4px;
}
.plot-card .plot-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.plot-maximize {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted-fg);
  cursor: pointer;
  padding: 2px 8px;
  border-radius: 4px;
  font: 13px/1 ui-sans-serif, system-ui;
}
.plot-maximize:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.plot-target {
  width: 100%;
  height: 220px;
}

/* ----- maximized plot overlay ----- */
.plot-backdrop {
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 100;
}
.plot-card.maximized {
  position: fixed !important;
  top: 4vh;
  right: 4vw;
  bottom: 4vh;
  left: 4vw;
  width: auto;
  height: auto;
  margin: 0;
  z-index: 101;                /* above .plot-backdrop */
  background: var(--bg);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.30);
  padding: 22px 26px;
  border-radius: var(--radius);
  display: block;
}
.plot-card.maximized .plot-card-head { margin-bottom: 12px; }
.plot-card.maximized h3 { font-size: 16px; }
.plot-card.maximized .plot-maximize {
  font-size: 16px;
  padding: 4px 12px;
}
.plot-card.maximized .plot-target {
  width: 100%;
  /* card height = 100vh - 8vh padding; subtract header (~60px) */
  height: calc(92vh - 80px);
}

/* Per-benchmark "How to submit" steps (collapsible). */
.submit-steps {
  margin: 10px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 14px;
}
.submit-steps > summary {
  cursor: pointer;
  padding: 6px 0;
  font-size: 15px;
}
.submit-steps[open] > summary { margin-bottom: 6px; }