@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@600;700&family=Inter:wght@500;600;700&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root {
  /* Dark Mode: the original amber-on-slate look */
  --bg: #12161c;
  --panel: #1a2029;
  --panel-2: #212936;
  --border: #2a3340;
  --amber: #e8a33d;
  --amber-dim: #8a6427;
  --green: #5fbf8b;
  --red: #d9644f;
  --text: #e9ecef;
  --muted: #7c8794;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --disp: 'Oswald', var(--sans);
}

html[data-theme="light"] {
  /* Day Mode: sunny, warm, cheerful — a morning feel rather than "not dark mode" */
  --bg: #fff6e9;           /* warm cream, like morning light */
  --panel: #ffffff;
  --panel-2: #fdecd2;      /* soft peach for inputs/cards */
  --border: #eccb96;       /* warm tan border */
  --amber: #f28c28;        /* vibrant sunny orange accent */
  --amber-dim: #f6b56b;
  --green: #2ecc71;        /* fresh, energetic green */
  --red: #e5533d;
  --text: #3a2c1a;         /* warm dark brown, softer than black */
  --muted: #8a7658;        /* warm muted brown, clearly lighter than --text */
}

* { box-sizing: border-box; }
html, body { background: var(--bg); margin: 0; padding: 0; }
body { 
  font-family: var(--sans); 
  color: var(--text); 
  font-size: 18px; 
  -webkit-text-size-adjust: 100%;
}

.app-shell {
  max-width: 1024px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 96px;
  position: relative;
}

.app-header {
  padding: 24px 24px 18px;
  border-bottom: 2px solid var(--border);
  background: var(--panel);
  position: sticky;
  top: 0;
  z-index: 5;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--amber);
  text-transform: uppercase;
}

.app-header h1 {
  font-family: var(--disp);
  font-size: 34px;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 6px 0 0;
}

.theme-toggle {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 999px;
  border: 2px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
}
.theme-toggle:active { transform: translateY(2px); }

.app-content { 
  flex: 1; 
  padding: 24px; 
}

.tabbar {
  position: fixed;
  bottom: 0; 
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1024px;
  display: flex;
  background: var(--panel);
  border-top: 2px solid var(--border);
  z-index: 10;
}

.tabbtn {
  flex: 1;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 16px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.tabbtn .dot { width: 8px; height: 8px; border-radius: 50%; background: transparent; }
.tabbtn.active { color: var(--amber); font-weight: 700; }
.tabbtn.active .dot { background: var(--amber); box-shadow: 0 0 8px 1px var(--amber); }

.card {
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 18px;
}

.card-title { 
  font-family: var(--disp); 
  font-size: 22px; 
  font-weight: 700; 
  letter-spacing: 0.03em;
}

.muted { color: var(--muted); }
.mono { font-family: var(--mono); }

.row { display: flex; align-items: center; gap: 14px; }
.row.between { justify-content: space-between; }
.wrap { flex-wrap: wrap; }

input, select, button {
  background: var(--panel-2);
  border: 2px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 14px 16px;
  font-family: var(--sans);
  font-size: 20px;
  font-weight: 600;
  min-height: 56px;
}
input, select { width: 100%; }
input:focus, select:focus { outline: none; border-color: var(--amber); }
input::placeholder { color: var(--muted); font-weight: 400; }

.btn {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 14px 22px;
  border-radius: 10px;
  border: 2px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
}
.btn-amber { background: var(--amber); border-color: var(--amber); color: #111418; font-weight: 700; }
.btn-ghost { background: transparent; border: 2px solid var(--border); color: var(--text); }
.btn-sm { padding: 10px 16px; font-size: 14px; min-height: 44px; }
.btn-danger { color: var(--red); border-color: var(--red); background: transparent; }
.btn-block { width: 100%; text-align: center; }

.chip {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 8px 14px;
  border-radius: 999px;
  border: 2px solid var(--border);
  color: var(--muted);
  text-decoration: none;
  display: inline-block;
  white-space: nowrap;
}
.chip.on { color: var(--amber); border-color: var(--amber); background: rgba(245,171,53,0.15); }
.chip.caution { color: var(--red); border-color: var(--red); background: rgba(240,106,85,0.15); }
.chip.side { color: var(--amber); border-color: var(--amber); background: rgba(245,171,53,0.15); }

.exercise-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
  border-bottom: 2px solid var(--border);
  gap: 16px;
}
.exercise-row:last-child { border-bottom: none; }
.ex-name { font-size: 20px; font-weight: 600; }
.ex-meta { font-size: 15px; color: var(--muted); margin-top: 4px; font-family: var(--mono); }

.set-row { display: grid; grid-template-columns: 44px 1fr 1fr; gap: 12px; align-items: center; margin-bottom: 12px; }
.set-row-uni { display: grid; grid-template-columns: 36px 1fr 1fr 1fr 1fr; gap: 10px; align-items: center; margin-bottom: 12px; }
.set-row-uni input { padding: 12px 10px; font-size: 18px; }
.set-idx { font-family: var(--mono); font-size: 18px; font-weight: 700; color: var(--muted); text-align: center; }

.empty { text-align: center; padding: 60px 24px; color: var(--muted); }
.empty-title { font-family: var(--disp); color: var(--text); font-size: 24px; margin-bottom: 8px; }

.last-time {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  background: var(--panel-2);
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  margin-top: 8px;
}

.gauge-wrap { display: flex; align-items: center; justify-content: center; padding: 12px 0 16px; }
.gauge-label { font-family: var(--mono); font-size: 14px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.1em; text-align: center; margin-top: 6px; }

form { margin: 0; }