/* ============================================================
   WattTrack — design system (dark, single theme)
   Chart roles follow the dataviz reference palette, validated
   against the app's dark surface (#16181d).
   ============================================================ */

:root {
  /* surfaces / ink */
  --plane:        #0c0d10;
  --surface-1:    #16181d;   /* card / chart surface */
  --surface-2:    #1d2027;
  --text-primary: #ffffff;
  --text-secondary: #c3c2b7;
  --muted:        #898781;
  --gridline:     #2c2c2a;
  --baseline:     #383835;
  --border:       rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);

  /* brand */
  --accent:       #3987e5;
  --accent-2:     #4fd1e0;
  --accent-soft:  rgba(57, 135, 229, 0.16);

  /* data series (validated) */
  --series-1:     #3987e5;   /* blue  — grid usage */
  --series-2:     #199e70;   /* aqua  — comparison / last cycle */
  --solar:        #eda100;

  /* sequential blue track for meters */
  --track:        #21324a;

  /* status */
  --good:         #0ca30c;
  --warning:      #fab219;
  --serious:      #ec835a;
  --critical:     #d03b3b;

  --shadow-card:  0 1px 0 rgba(255,255,255,0.03) inset, 0 8px 30px -12px rgba(0,0,0,0.6);
  --ease:         cubic-bezier(0.22, 1, 0.36, 1);
}

* { -webkit-tap-highlight-color: transparent; }
html { scroll-behavior: smooth; }
body { text-rendering: optimizeLegibility; }

/* Subtle top glow behind the header for depth */
body::before {
  content: "";
  position: fixed;
  inset: -20% 0 auto 0;
  height: 380px;
  background: radial-gradient(60% 100% at 50% 0%, rgba(57,135,229,0.10), transparent 70%);
  pointer-events: none;
  z-index: 0;
}
main, header { position: relative; z-index: 1; }

/* ---------- Logo ---------- */
.logo-mark {
  display: inline-grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 10px;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 18px -6px rgba(57,135,229,0.7);
}

/* ---------- Navigation ---------- */
.nav-btn {
  padding: 0.5rem 0.9rem;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  transition: color .2s var(--ease), background .2s var(--ease);
}
.nav-btn:hover { color: var(--text-secondary); background: rgba(255,255,255,0.04); }
.nav-btn.is-active { color: var(--text-primary); background: var(--accent-soft); }

.bottom-nav {
  display: grid;
  grid-template-columns: 1fr 1fr auto 1fr 1fr;
  align-items: center;
  padding: 8px max(12px, env(safe-area-inset-left)) calc(8px + env(safe-area-inset-bottom));
  background: rgba(12,13,16,0.9);
  backdrop-filter: blur(18px);
  border-top: 1px solid var(--border);
}
.bottom-nav .tab {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  font-size: 11px; font-weight: 500;
  color: var(--muted);
  padding: 6px 0;
  transition: color .2s var(--ease);
}
.bottom-nav .tab.is-active { color: var(--accent); }
.bottom-nav .tab-placeholder { width: 0; }
.fab {
  width: 56px; height: 56px;
  margin-top: -26px;
  border-radius: 18px;
  display: grid; place-items: center;
  font-size: 26px; font-weight: 300; color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 26px -8px rgba(57,135,229,0.75);
  transition: transform .15s var(--ease);
}
.fab:active { transform: scale(0.92); }

/* ---------- Buttons ---------- */
.btn-primary {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 0.55rem 1rem;
  border-radius: 12px;
  font-size: 14px; font-weight: 600; color: #fff;
  background: linear-gradient(135deg, var(--accent), #2f74cf);
  box-shadow: 0 8px 22px -10px rgba(57,135,229,0.9);
  transition: transform .12s var(--ease), filter .2s var(--ease);
}
.btn-primary:hover { filter: brightness(1.06); }
.btn-primary:active { transform: translateY(1px) scale(0.99); }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 0.5rem 0.9rem;
  border-radius: 11px;
  font-size: 14px; font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s;
}
.btn-ghost:hover { background: rgba(255,255,255,0.05); color: var(--text-primary); border-color: var(--border-strong); }
.btn-danger { color: #f3a3a3; border-color: rgba(208,59,59,0.35); }
.btn-danger:hover { background: rgba(208,59,59,0.12); color: #ffb4b4; border-color: rgba(208,59,59,0.5); }

.btn-icon {
  width: 34px; height: 34px; border-radius: 9px;
  display: grid; place-items: center;
  color: var(--muted); border: 1px solid transparent;
  transition: background .2s, color .2s;
}
.btn-icon:hover { background: rgba(255,255,255,0.06); color: var(--text-primary); }

/* ---------- Cards ---------- */
.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow-card);
}
.card-pad { padding: 1.15rem 1.25rem; }
.card-label {
  font-size: 12px; font-weight: 600; letter-spacing: .02em;
  color: var(--muted); text-transform: none;
}

/* stat tile value: proportional figures (not tabular) per dataviz */
.stat-value { font-weight: 650; letter-spacing: -0.01em; line-height: 1; }
.hero-value { font-weight: 700; letter-spacing: -0.02em; line-height: 0.95; }
.tnum { font-variant-numeric: tabular-nums; }

/* delta chips */
.delta { display: inline-flex; align-items: center; gap: 3px; font-size: 12px; font-weight: 600; }
.delta--up   { color: var(--serious); }   /* more usage = bad */
.delta--down { color: var(--good); }       /* less usage = good */
.delta--flat { color: var(--muted); }

/* status chips */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px;
  font-size: 12px; font-weight: 600;
  border: 1px solid transparent;
}
.chip-good     { color: #7ee08a; background: rgba(12,163,12,0.12); border-color: rgba(12,163,12,0.3); }
.chip-warning  { color: #ffd479; background: rgba(250,178,25,0.12); border-color: rgba(250,178,25,0.32); }
.chip-serious  { color: #ffb492; background: rgba(236,131,90,0.12); border-color: rgba(236,131,90,0.32); }
.chip-critical { color: #ffa1a1; background: rgba(208,59,59,0.14); border-color: rgba(208,59,59,0.36); }
.chip-neutral  { color: var(--text-secondary); background: rgba(255,255,255,0.05); border-color: var(--border); }

/* ---------- Forms ---------- */
.field-label { font-size: 12px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; display: block; }
.input, .select {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.7rem 0.85rem;
  font-size: 15px; color: var(--text-primary);
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}
.input:focus, .select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.input::placeholder { color: var(--muted); }
.input-big { font-size: 30px; font-weight: 650; letter-spacing: -0.01em; padding: 0.6rem 0.85rem; font-variant-numeric: tabular-nums; }
.input-big::-webkit-outer-spin-button, .input-big::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.input-big { -moz-appearance: textfield; }
.hint { font-size: 12px; color: var(--muted); margin-top: 6px; }

/* toggle */
.toggle { position: relative; width: 46px; height: 27px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); transition: background .2s; cursor: pointer; flex: none; }
.toggle::after { content:""; position:absolute; top:2px; left:2px; width:21px; height:21px; border-radius:50%; background:#fff; transition: transform .2s var(--ease); }
.toggle.on { background: var(--accent); border-color: var(--accent); }
.toggle.on::after { transform: translateX(19px); }

/* ---------- Gauge (slab progress) ---------- */
.gauge-track { fill: none; stroke: var(--track); stroke-linecap: round; }
.gauge-fill  { fill: none; stroke-linecap: round; transition: stroke .4s var(--ease); }

/* ---------- Charts ---------- */
.chart-svg { display: block; width: 100%; height: auto; overflow: visible; }
.grid-line { stroke: var(--gridline); stroke-width: 1; }
.axis-line { stroke: var(--baseline); stroke-width: 1; }
.axis-text { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.bar { fill: var(--series-1); }
.bar-est { fill: var(--series-1); opacity: 0.4; }
.bar, .bar-est { transform-box: fill-box; }
.bar-hit { fill: transparent; }
.bar-hit:hover + * { }
.gauge-center { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; pointer-events: none; }
.chart-tooltip {
  position: absolute; z-index: 20; pointer-events: none;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: 10px; padding: 8px 10px;
  font-size: 12px; color: var(--text-primary);
  box-shadow: 0 10px 30px -10px rgba(0,0,0,0.8);
  transform: translate(-50%, -110%);
  white-space: nowrap; opacity: 0; transition: opacity .12s;
}
.chart-tooltip .tt-sub { color: var(--muted); font-size: 11px; margin-top: 2px; }
.chart-wrap { position: relative; }

/* segmented control */
.seg { display: inline-flex; background: var(--surface-2); border: 1px solid var(--border); border-radius: 11px; padding: 3px; gap: 2px; }
.seg button { padding: 5px 12px; border-radius: 8px; font-size: 13px; font-weight: 500; color: var(--muted); transition: all .18s var(--ease); }
.seg button.is-active { background: var(--accent-soft); color: #fff; }

/* ---------- Modal ---------- */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 40;
  background: rgba(4,5,7,0.66);
  backdrop-filter: blur(4px);
  display: flex; align-items: flex-end; justify-content: center;
}
@media (min-width: 640px) { .modal-backdrop { align-items: center; } }
.modal-sheet {
  width: 100%; max-width: 460px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 22px 22px 0 0;
  box-shadow: 0 -10px 50px -10px rgba(0,0,0,0.7);
  padding: 1.25rem 1.25rem calc(1.25rem + env(safe-area-inset-bottom));
}
@media (min-width: 640px) { .modal-sheet { border-radius: 22px; } }

/* ---------- Toast ---------- */
.toast {
  pointer-events: auto;
  display: flex; align-items: center; gap: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  padding: 10px 12px 10px 14px;
  font-size: 14px; color: var(--text-primary);
  box-shadow: 0 14px 40px -12px rgba(0,0,0,0.8);
  max-width: 92vw;
}
.toast .toast-dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.toast button { color: var(--accent-2); font-weight: 600; font-size: 13px; padding: 2px 6px; }

/* ---------- Table ---------- */
.tbl { width: 100%; border-collapse: collapse; }
.tbl th { font-size: 11px; font-weight: 600; color: var(--muted); text-align: left; padding: 10px 12px; }
.tbl td { padding: 12px; border-top: 1px solid var(--border); font-size: 14px; }
.tbl tr:hover td { background: rgba(255,255,255,0.02); }

/* misc */
.nudge { border-color: rgba(57,135,229,0.35); background: linear-gradient(180deg, rgba(57,135,229,0.06), transparent); }
.tile { transition: border-color .2s var(--ease); }
.tile:hover { border-color: var(--border-strong); }
.hist-row { display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 12px; padding: 14px 4px; border-top: 1px solid var(--border); }
.hist-row:first-child { border-top: none; }
.slab-row { display: grid; grid-template-columns: 1fr 1fr auto; gap: 8px; align-items: center; }
.divider { height: 1px; background: var(--border); }
.empty-illustration { color: var(--muted); }
.badge-est { font-size: 10px; font-weight: 700; letter-spacing: .04em; color: #ffd479; background: rgba(250,178,25,0.12); border: 1px solid rgba(250,178,25,0.3); padding: 1px 6px; border-radius: 6px; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #2a2d34; border-radius: 999px; border: 3px solid var(--plane); }
::-webkit-scrollbar-track { background: transparent; }

/* ---------- Reduced motion: instant, no jank ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}