/* ============================================================
   Minimal Apple-style theme. The page is neutral (white / grey /
   black); colour is used sparingly and always means the same thing:
     orange = inspiratory / IPAP     teal   = expiratory / EPAP / CPAP
     pink   = blower pressure        purple = flow
     blue   = target / idle          green / red = OK / error
   ============================================================ */

/* Ring fill (0-1), set by ui.js from the pressure; registered so it animates */
@property --fill {
  syntax: "<number>";
  inherits: true;
  initial-value: 0;
}

:root {
  --bg: #f5f5f7;
  --card: #ffffff;
  --fill-bg: rgba(0, 0, 0, .05);
  --fill-bg-2: rgba(0, 0, 0, .09);
  --thumb: #ffffff;
  --separator: rgba(0, 0, 0, .08);
  --label: #1d1d1f;
  --label-2: #86868b;
  --label-3: #c7c7cc;
  --invert: #1d1d1f;      /* solid button */
  --on-invert: #ffffff;

  --orange: #ff9500;
  --pink: #ff2d55;
  --purple: #af52de;
  --blue: #007aff;
  --teal: #30b0c7;
  --green: #34c759;
  --red: #ff3b30;

  --accent: var(--blue);
  color-scheme: light;

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius: 22px;
  --ease: cubic-bezier(.25, .1, .25, 1);
  --spring: cubic-bezier(.32, .72, 0, 1);
}

:root[data-theme="dark"] {
  --bg: #000000;
  --card: #121214;
  --fill-bg: rgba(255, 255, 255, .07);
  --fill-bg-2: rgba(255, 255, 255, .12);
  --thumb: #2c2c2e;
  --separator: rgba(255, 255, 255, .08);
  --label: #f5f5f7;
  --label-2: #8e8e93;
  --label-3: #48484a;
  --invert: #f5f5f7;
  --on-invert: #000000;

  --orange: #ff9f0a;
  --pink: #ff375f;
  --purple: #bf5af2;
  --blue: #0a84ff;
  --teal: #40c8e0;
  --green: #30d158;
  --red: #ff453a;
  color-scheme: dark;
}

/* Gauge and phase badge follow the breath phase */
body.phase-insp { --accent: var(--orange); }
body.phase-exp { --accent: var(--teal); }

* { box-sizing: border-box; }

html { background: var(--bg); }

body {
  font-family: var(--font);
  color: var(--label);
  background: var(--bg);
  margin: 0;
  min-height: 100vh;
  padding: max(1rem, env(safe-area-inset-top)) 1rem calc(1.25rem + env(safe-area-inset-bottom));
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  transition: background .3s var(--ease), color .3s var(--ease), --fill .25s linear;
}

.grain { display: none; }

/* ---------- Header ---------- */

.topbar {
  max-width: 440px;
  margin: .25rem auto 1.25rem;
  display: flex;
  gap: .75rem;
  align-items: center;
  justify-content: space-between;
  animation: rise .7s var(--spring) both;
}

.brand { display: flex; align-items: center; gap: .5rem; min-width: 0; }

.brand_mark { flex: none; width: 22px; height: 22px; color: var(--accent); transition: color .5s var(--ease); }
.brand_mark circle { display: none; }

h1 {
  margin: 0;
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.topbar_end { flex: none; display: flex; align-items: center; gap: .75rem; }

/* Theme switch: a small round icon button (moon / sun) */
.theme_toggle {
  display: inline-flex;
  padding: 0;
  background: none;
  color: var(--label-2);
}
.theme_toggle .switch_label { display: none; }
.switch_track {
  width: 34px; height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--fill-bg);
  transition: background .2s var(--ease);
}
.theme_toggle:hover .switch_track { background: var(--fill-bg-2); }
.switch_thumb { display: grid; place-items: center; color: var(--label); }
.switch_thumb svg { width: 16px; height: 16px; }
/* Show the theme you'd switch to */
.switch_thumb .moon { display: block; }
.switch_thumb .sun { display: none; }
.theme_toggle[aria-checked="false"] .moon { display: none; }
.theme_toggle[aria-checked="false"] .sun { display: block; }

.live_dot { display: none; }

/* ---------- Layout ---------- */

.layout {
  max-width: 440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .75rem;
}

/* Never let a child push the column wider than the screen */
.layout > *, .card, .setpoints > * { min-width: 0; }

h2 {
  margin: 0 0 .9rem;
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--label-2);
}

.card {
  position: relative;
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.15rem 1.2rem 1.2rem;
  transition: background .3s var(--ease);
  animation: rise .7s var(--spring) both;
  animation-delay: calc(var(--i, 0) * 60ms + 80ms);
}

/* ---------- Connection ---------- */

.connect_panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: 0 .1rem;
  animation: rise .7s var(--spring) both .04s;
}

.status_line { flex: 1 1 auto; display: flex; align-items: center; gap: .55rem; min-width: 0; }

.status_led {
  flex: none;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--label-3);
  transition: background .3s var(--ease);
}
.is-busy .status_led { background: var(--orange); animation: blink .9s ease-in-out infinite; }
.is-connected .status_led { background: var(--green); }
.is-error .status_led { background: var(--red); }

#connect_status {
  margin: 0;
  font-size: .85rem;
  line-height: 1.3;
  color: var(--label-2);
  /* Wrap onto a second line rather than cutting the text off */
  overflow-wrap: anywhere;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  overflow: hidden;
}
.is-connected #connect_status { color: var(--label); }
.is-error #connect_status { color: var(--red); }

.bt_wrapper { flex: none; }

/* ---------- Buttons ---------- */

button {
  font-family: var(--font);
  border: none;
  color: var(--label);
  cursor: pointer;
  touch-action: manipulation;
  transition: transform .2s var(--spring), background .2s var(--ease), color .2s var(--ease), opacity .2s;
}
button:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }
button:active { transform: scale(.96); }

/* Solid monochrome pill */
#bluetoothConnect {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .55rem 1rem .55rem .8rem;
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 500;
  color: var(--on-invert);
  background: var(--invert);
}
#bluetoothConnect svg { width: 15px; height: 15px; }
#bluetoothConnect:hover { opacity: .85; }
#bluetoothConnect:disabled { opacity: .45; cursor: progress; }
/* Disconnect: quiet secondary pill */
.is-connected #bluetoothConnect {
  color: var(--label);
  background: var(--fill-bg);
}
.is-connected #bluetoothConnect:hover { color: var(--red); opacity: 1; }

/* ---------- Hero / Pressure ---------- */

.hero { padding-bottom: 1.1rem; }

.hero_head { display: flex; justify-content: space-between; align-items: center; gap: .5rem; }
.hero_head h2 { margin: 0; }

.phase_chip {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .8rem;
  font-weight: 500;
  color: var(--label-2);
  white-space: nowrap;
  transition: color .4s var(--ease);
}
.phase_chip::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--label-3);
  transition: background .4s var(--ease);
}
.phase-insp .phase_chip, .phase-exp .phase_chip { color: var(--accent); }
.phase-insp .phase_chip::before, .phase-exp .phase_chip::before { background: var(--accent); }
body:not(.phase-insp):not(.phase-exp) .phase_chip { visibility: hidden; }

.gauge {
  position: relative;
  display: grid;
  place-items: center;
  /* Scales with screen height so the pressure controls stay in view */
  min-height: clamp(170px, 28dvh, 240px);
  margin: .6rem 0 1rem;
}

/* Thin ring: a faint track with an arc that fills with the pressure */
.breath { position: absolute; inset: 0; display: grid; place-items: center; pointer-events: none; }

.ring {
  --size: 210px;
  --stroke: 6px;
  position: absolute;
  width: var(--size); height: var(--size);
  border-radius: 50%;
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - var(--stroke)), #000 calc(100% - var(--stroke) + .5px));
  mask: radial-gradient(farthest-side, transparent calc(100% - var(--stroke)), #000 calc(100% - var(--stroke) + .5px));
}
.r1 { background: var(--fill-bg-2); }
.r2 {
  background: conic-gradient(var(--accent) calc(var(--fill) * 360deg), transparent 0);
  transition: background .5s var(--ease);
}
.r3 { display: none; }

/* Idle: the track breathes slowly until connected */
body:not(.is-connected) .r1 { animation: idle 5s ease-in-out infinite; }

#pressureDisplay {
  position: relative;
  margin: 0;
  max-width: 130px;
  text-align: center;
  font-size: .9rem;
  line-height: 1.3;
  color: var(--label-2);
  overflow-wrap: anywhere;
}
.is-connected #pressureDisplay {
  max-width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  font-family: var(--display);
  font-size: clamp(3rem, 15vw, 3.75rem);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -0.04em;
  overflow-wrap: normal;
  color: var(--label);
  font-variant-numeric: tabular-nums;
}

.p_unit {
  margin-top: .45em;
  font-family: var(--font);
  font-size: .22em;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--label-2);
}

/* ---------- Stats ---------- */

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .5rem;
  margin: 0;
  padding-top: 1rem;
  border-top: 1px solid var(--separator);
}

.stat { min-width: 0; }

/* Label with a small colour dot */
.stat dt {
  display: flex;
  align-items: center;
  gap: .35rem;
  font-size: .72rem;
  color: var(--label-2);
  margin-bottom: .3rem;
  white-space: nowrap;
}
.stat dt::before {
  content: "";
  flex: none;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--dot, var(--label-3));
}
.stat:nth-child(1) { --dot: var(--pink); }
.stat:nth-child(2) { --dot: var(--blue); }
.stat:nth-child(3) { --dot: var(--purple); }
.link-ok .stat:nth-child(4) { --dot: var(--green); }
.link-lost .stat:nth-child(4) { --dot: var(--red); }

.small {
  margin: 0;
  font-size: .82rem;
  font-weight: 500;
  color: var(--label);
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}
.link-lost #linkDisplay { color: var(--red); animation: blink 1s ease-in-out infinite; }

/* ---------- Mode (segmented control) ---------- */

.mode_row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2px;
  padding: 3px;
  border-radius: 12px;
  background: var(--fill-bg);
}

/* Each mode has its own colour: grey standby, teal CPAP, orange BiPAP
   (BiPAP's dot is half orange / half teal as it uses both pressures) */
.mode_btn {
  --mc: var(--label-2);
  --dot: var(--mc);
  min-width: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .6rem .25rem;
  border-radius: 9px;
  font-size: .88rem;
  font-weight: 500;
  background: transparent;
  color: var(--label-2);
}
.mode_btn[data-mode="CPAP"] { --mc: var(--teal); }
.mode_btn[data-mode="BIPAP"] { --mc: var(--orange); --dot: linear-gradient(90deg, var(--orange) 50%, var(--teal) 50%); }
.mode_btn::before {
  content: "";
  flex: none;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--dot);
  opacity: .45;
  transition: opacity .2s var(--ease);
}
.mode_btn:hover { color: var(--label); }

.mode_btn.active {
  color: var(--mc);
  font-weight: 600;
  background: color-mix(in srgb, var(--mc) 12%, var(--thumb));
  box-shadow: 0 1px 3px rgba(0, 0, 0, .1), 0 1px 1px rgba(0, 0, 0, .04);
}
.mode_btn.active::before { opacity: 1; }

/* ---------- Setpoints ---------- */

.setpoints {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(140px, 100%), 1fr));
  gap: .75rem;
}

.setpoint { container-type: inline-size; --tone: var(--teal); }
.setpoint.insp { --tone: var(--orange); }

.setpoint h2 { display: flex; align-items: center; gap: .4rem; }
.setpoint h2::before {
  content: "";
  flex: none;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--tone);
}

.adjust_row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
}

.value_wrap { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; align-items: center; }

.set_value {
  font-family: var(--display);
  font-size: 2.6rem;
  font-weight: 200;
  letter-spacing: -0.04em;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  color: var(--label);
  font-variant-numeric: tabular-nums;
}

.unit {
  margin-top: .35rem;
  font-size: .72rem;
  color: var(--label-2);
}

.round_btn {
  flex: none;
  width: 48px; height: 48px;
  border-radius: 50%;
  font-size: 1.35rem;
  font-weight: 300;
  line-height: 1;
  display: grid;
  place-items: center;
  padding: 0;
  color: var(--label);
  background: var(--fill-bg);
}
.round_btn:hover { background: var(--fill-bg-2); }
.round_btn:active { color: #fff; background: var(--tone); }

/* Side-by-side cards are narrow: put the number on top and the -/+ buttons in a row below */
@container (max-width: 250px) {
  .adjust_row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-areas: "value value" "down up";
    gap: .6rem;
  }
  .value_wrap { grid-area: value; margin-bottom: .35rem; }
  .adjust_row .round_btn:first-child { grid-area: down; }
  .adjust_row .round_btn:last-child { grid-area: up; }
  .round_btn { width: 100%; height: 40px; border-radius: 12px; }
  .set_value { font-size: clamp(2.2rem, 22cqi, 2.8rem); }
}

/* ---------- Motion ---------- */

@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

@keyframes idle {
  0%, 100% { opacity: .5; }
  50% { opacity: 1; }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: .35; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* Phones: tighten spacing so everything fits the screen */
@media (max-width: 520px) {
  body { padding-left: max(1rem, env(safe-area-inset-left)); padding-right: max(1rem, env(safe-area-inset-right)); }
  .card { padding: 1rem 1rem 1.05rem; }
  .ring { --size: clamp(150px, 26dvh, 190px); }
}

@media (max-width: 360px) {
  .is-connected #pressureDisplay { font-size: 2.6rem; }
  .mode_btn { font-size: .82rem; }
  .small { font-size: .74rem; }
}