/*
 * SwimTeam — pool water palette.
 *
 * Deep water for chrome and headings, pool-tile aqua for accents, and the
 * lane-line motif that runs under page headers and along table rows.
 */

:root {
  --deep: #033f63;
  --deep-dark: #022b45;
  --water: #0a6ea8;
  --aqua: #16b4c9;
  --aqua-light: #7fe0e8;
  --foam: #eaf7fb;
  --sand: #f6fbfd;
  --ink: #12333f;
  --muted: #5d7f8d;
  --line: #d3e7ef;
  --warn: #b4541a;
  --bad: #b00020;
  --good: #0d7a5f;

  --radius: 12px;
  --shadow: 0 1px 2px rgba(3, 63, 99, .07), 0 8px 24px rgba(3, 63, 99, .07);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  color: var(--ink);
  background: var(--sand);
  line-height: 1.55;
}

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

.site-header {
  background: linear-gradient(160deg, var(--deep) 0%, var(--water) 100%);
  color: #fff;
}

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: .85rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: .01em;
}

.brand-mark { width: 30px; height: 30px; color: var(--aqua-light); flex: none; }

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1.1rem;
  flex-wrap: wrap;
}

.site-nav a { color: #fff; text-decoration: none; font-weight: 500; }
.site-nav a:hover { text-decoration: underline; }
.site-nav .who { color: var(--aqua-light); font-size: .9rem; }

.link-button {
  background: none;
  border: 0;
  color: #fff;
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  padding: 0;
  text-decoration: none;
}
.link-button:hover { text-decoration: underline; }
.inline { display: inline; }

/* ---------- waves ---------- */

.waves { line-height: 0; background: linear-gradient(160deg, var(--deep) 0%, var(--water) 100%); }
.waves svg { width: 100%; height: 44px; display: block; }
.waves svg path { fill: var(--sand); }

.hero + .waves svg path { fill: var(--sand); }

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

main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
}

h1 { font-size: 1.75rem; margin: 0 0 .3rem; letter-spacing: -.01em; }
h2 { font-size: 1.2rem; margin: 2rem 0 .75rem; }
.subtitle { color: var(--muted); margin: 0 0 1.5rem; }

/* ---------- hero (signed-out landing) ---------- */

.hero {
  background: linear-gradient(160deg, var(--deep) 0%, var(--water) 65%, var(--aqua) 140%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

/* Lane lines, drawn as repeating stripes across the hero. */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    180deg,
    transparent 0 62px,
    rgba(255, 255, 255, .07) 62px 64px);
  pointer-events: none;
}

.hero-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 3.5rem 1.25rem 4rem;
  position: relative;
  z-index: 1;
}

.hero h1 { font-size: clamp(2rem, 4.5vw, 3rem); max-width: 18ch; line-height: 1.1; }
.hero p { font-size: 1.1rem; max-width: 52ch; color: var(--aqua-light); }

.hero-actions { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1.75rem; }

/* ---------- cards & panels ---------- */

.panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.panel + .panel { margin-top: 1.25rem; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat {
  background: #fff;
  border: 1px solid var(--line);
  border-top: 3px solid var(--aqua);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
}

.stat .value { font-size: 1.85rem; font-weight: 700; color: var(--deep); line-height: 1.1; }
.stat .label { color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .06em; }
.stat .unit { font-size: .95rem; font-weight: 500; color: var(--muted); }

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

.table-wrap { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; font-size: .95rem; }

th {
  text-align: left;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  padding: .6rem .75rem;
  border-bottom: 2px solid var(--line);
  white-space: nowrap;
}

td { padding: .7rem .75rem; border-bottom: 1px solid var(--line); }

/* Lane-line striping. */
tbody tr:nth-child(even) { background: var(--foam); }
tbody tr:hover { background: #dff1f7; }

td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

.row-link { color: var(--water); font-weight: 600; text-decoration: none; }
.row-link:hover { text-decoration: underline; }

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

.badge {
  display: inline-block;
  padding: .12rem .5rem;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 600;
  background: var(--foam);
  color: var(--water);
  border: 1px solid var(--line);
  white-space: nowrap;
}

.badge.stale { background: #fdf0e6; color: var(--warn); border-color: #f3d6c0; }
.badge.none { background: #f2f4f5; color: var(--muted); border-color: #e2e8ea; }
.badge.open { background: #e6f7f0; color: var(--good); border-color: #c6ebdd; }

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

label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: .3rem; }

input[type=text], input[type=email], input[type=password], input[type=file] {
  width: 100%;
  padding: .6rem .7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  background: #fff;
}

input:focus-visible, button:focus-visible, a:focus-visible {
  outline: 3px solid var(--aqua);
  outline-offset: 2px;
}

.field { margin-bottom: 1rem; }

.checkbox { display: flex; align-items: center; gap: .5rem; font-weight: 500; }
.checkbox input { width: auto; }

button, .button {
  display: inline-block;
  background: var(--water);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: .65rem 1.3rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

button:hover, .button:hover { background: var(--deep); }

.button.ghost {
  background: transparent;
  border: 2px solid var(--aqua-light);
  color: #fff;
}
.button.ghost:hover { background: rgba(255, 255, 255, .12); }

.button.small { padding: .4rem .9rem; font-size: .9rem; }

.button.secondary { background: var(--foam); color: var(--deep); border: 1px solid var(--line); }
.button.secondary:hover { background: #d9eef5; }

/* ---------- auth pages ---------- */

.auth-wrap { max-width: 460px; margin: 3rem auto; padding: 0 1.25rem; }
.auth-wrap.wide { max-width: 560px; }

.tabs { display: flex; gap: .5rem; margin-bottom: 1.25rem; }

.tabs button {
  flex: 1;
  background: var(--foam);
  color: var(--deep);
  border: 1px solid var(--line);
}
.tabs button[aria-selected=true] { background: var(--water); color: #fff; border-color: var(--water); }

/* ---------- notices ---------- */

.notice {
  border-radius: 8px;
  padding: .75rem 1rem;
  margin-bottom: 1.25rem;
  border: 1px solid;
}

.notice.error { background: #fdecef; border-color: #f5c6ce; color: var(--bad); }
.notice.ok { background: #e6f7f0; border-color: #c6ebdd; color: var(--good); }
.notice.info { background: var(--foam); border-color: var(--line); color: var(--deep); }

/* ---------- join code ---------- */

.join-code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--deep);
  background: var(--foam);
  border: 1px dashed var(--aqua);
  border-radius: 8px;
  padding: .5rem .9rem;
  display: inline-block;
}

/* ---------- charts ---------- */

.chart { width: 100%; height: auto; background: var(--foam); border-radius: 8px; }
.chart polyline { fill: none; stroke: var(--water); stroke-width: 2; stroke-linejoin: round; }
.chart .axis { stroke: var(--line); stroke-width: 1; }

/* Lap bars: width set inline from lap duration. */
.lap-bar {
  display: block;
  height: 10px;
  min-width: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--aqua), var(--water));
}

/* ---------- empty states ---------- */

.empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--muted);
}

.empty svg { width: 64px; height: 64px; color: var(--aqua-light); }

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

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 1.25rem;
  text-align: center;
  color: var(--muted);
  font-size: .88rem;
}

/* ---------- utility ---------- */

.muted { color: var(--muted); }
.right { text-align: right; }
.stack > * + * { margin-top: 1rem; }
.split { display: flex; gap: 1rem; align-items: baseline; flex-wrap: wrap; }
.split .grow { flex: 1; }

@media (max-width: 640px) {
  .header-inner { gap: .75rem; }
  .site-nav { gap: .75rem; width: 100%; }
  th, td { padding: .55rem .5rem; }
}