/* Sport Dashboard — mobile-first dark theme */
:root {
  --bg: #0b0f14;
  --card: #131923;
  --card-2: #1a2230;
  --text: #e6ecf3;
  --muted: #7b8798;
  --accent: #4fd1c5;
  --accent-2: #ffb454;
  --warn: #f56565;
  --ok: #48bb78;
  --border: #1f2938;
  --radius: 14px;
  --gap: 12px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); min-height: 100%; }
body { padding: 0 12px 40px; }
a { color: var(--accent); text-decoration: none; }
h1, h2, h3 { margin: 0; font-weight: 600; }
h1 { font-size: 22px; }
h2 { font-size: 15px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
h3 { font-size: 13px; color: var(--muted); }
p { margin: 0; }

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

/* Topbar */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 4px 12px;
  background: linear-gradient(180deg, var(--bg) 0%, rgba(11,15,20,0.85) 100%);
  backdrop-filter: blur(6px);
}
.brand { font-weight: 700; font-size: 18px; letter-spacing: 0.02em; }
.meta { display: flex; align-items: center; gap: 8px; }
.ghost {
  background: transparent; color: var(--muted); border: 1px solid var(--border);
  padding: 6px 10px; border-radius: 8px; font-size: 14px; cursor: pointer;
  line-height: 1; text-decoration: none;
}
.ghost:hover { color: var(--text); border-color: var(--muted); }

/* Cards */
main { display: flex; flex-direction: column; gap: var(--gap); max-width: 780px; margin: 0 auto; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.card-title { margin-bottom: 12px; }
.sub-title { margin: 14px 0 6px; }

/* Stat grid */
.grid-4 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
@media (min-width: 560px) { .grid-4 { grid-template-columns: repeat(4, 1fr); } }
.grid-4 > .card-title { grid-column: 1 / -1; }

.stat {
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  display: flex; flex-direction: column; gap: 3px;
  min-height: 62px;
}
.stat .label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.stat .value { font-size: 20px; font-weight: 600; font-variant-numeric: tabular-nums; }
.stat .hint  { font-size: 11px; color: var(--muted); }
.stat .value.up   { color: var(--ok); }
.stat .value.down { color: var(--warn); }
.stat .value.flat { color: var(--accent-2); }

/* Activities */
.act-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.act {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  gap: 10px; align-items: center;
  padding: 10px 12px;
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.act .icon {
  width: 34px; height: 34px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg); color: var(--accent);
  font-size: 18px;
}
.act .body { min-width: 0; }
.act .name { font-weight: 600; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.act .sub  { font-size: 12px; color: var(--muted); }
.act .kpi  { text-align: right; font-variant-numeric: tabular-nums; font-size: 13px; }
.act .kpi .big { font-weight: 600; font-size: 15px; }

/* Bike */
.bike-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
@media (min-width: 560px) { .bike-grid { grid-template-columns: repeat(4, 1fr); } }

.zones { display: flex; flex-direction: column; gap: 6px; margin-top: 6px; }
.zone {
  display: grid;
  grid-template-columns: 44px 1fr 70px;
  gap: 8px; align-items: center;
  font-size: 12px;
}
.zone .zname { color: var(--muted); }
.zone .bar { height: 10px; background: var(--card-2); border-radius: 5px; overflow: hidden; }
.zone .bar > span { display: block; height: 100%; background: var(--accent); }
.zone.z1 .bar > span { background: #4a90e2; }
.zone.z2 .bar > span { background: #4fd1c5; }
.zone.z3 .bar > span { background: #48bb78; }
.zone.z4 .bar > span { background: #ffb454; }
.zone.z5 .bar > span { background: #f56565; }
.zone .zval { text-align: right; font-variant-numeric: tabular-nums; color: var(--muted); }

/* Trends bars */
.trend-block { margin-bottom: 10px; }
svg.bars { width: 100%; height: 120px; background: var(--card-2); border-radius: 10px; }
svg.bars rect { fill: var(--accent); }
svg.bars rect.current { fill: var(--accent-2); }
svg.bars text { fill: var(--muted); font-size: 10px; font-family: inherit; }

/* Login */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; }
.login-card {
  width: 100%; max-width: 340px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex; flex-direction: column; gap: 14px;
}
.login-card h1 { text-align: center; }
.login-card .sub { text-align: center; color: var(--muted); font-size: 13px; margin-top: -6px; }
.login-card label { display: flex; flex-direction: column; gap: 6px; font-size: 12px; color: var(--muted); }
.login-card input {
  background: var(--card-2); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); padding: 10px 12px; font-size: 15px; font-family: inherit;
}
.login-card input:focus { outline: none; border-color: var(--accent); }
.login-card button {
  background: var(--accent); color: #0b0f14; border: 0; border-radius: 8px;
  padding: 11px; font-size: 15px; font-weight: 600; cursor: pointer;
}
.login-card .err { color: var(--warn); font-size: 13px; text-align: center; }