:root {
  --bg1: #071521;
  --bg2: #123f52;
  --bg3: #0f6b68;
  --glass: rgba(255, 255, 255, .13);
  --glass2: rgba(255, 255, 255, .08);
  --line: rgba(255, 255, 255, .18);
  --text: #f7fbff;
  --muted: #cfe7ef;
  --accent: #9ee8ff;
  --accent2: #c7ffd8;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  min-height: 100dvh;
  background: linear-gradient(160deg, var(--bg1), var(--bg2), var(--bg3));
  background-attachment: fixed;
  overflow-x: hidden;
}

/* ------------------------------------------------------------- background */

.ambient { position: fixed; inset: 0; pointer-events: none; overflow: hidden; z-index: 0; }
.orb { position: absolute; border-radius: 50%; filter: blur(12px); opacity: .26; animation: float 24s infinite ease-in-out alternate; }
.orb.one   { width: 420px; height: 420px; background: #8ee6ff; left: -150px; top: -80px; }
.orb.two   { width: 360px; height: 360px; background: #b7ffd4; right: -120px; bottom: -90px; animation-delay: 4s; }
.orb.three { width: 240px; height: 240px; background: #fff; left: 55%; top: 8%; opacity: .12; animation-delay: 8s; }
@keyframes float { to { transform: translate(45px, 35px) scale(1.12); } }

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

.page { position: relative; z-index: 1; min-height: 100dvh; display: flex; align-items: center; justify-content: center; padding: 28px; }
.shell { width: min(1120px, 100%); display: grid; grid-template-columns: 1.05fr .95fr; gap: 22px; align-items: stretch; }

.panel {
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 30px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .26);
  backdrop-filter: blur(18px);
}

.main { padding: 30px; display: grid; grid-template-rows: auto auto 1fr auto auto; gap: 18px; min-height: 700px; }
.side { padding: 22px; display: flex; flex-direction: column; gap: 14px; min-height: 700px; }

.title { margin: 0; font-size: clamp(1.8rem, 3.4vw, 2.9rem); line-height: 1.05; letter-spacing: -.04em; }
.subtitle { margin-top: 8px; color: var(--muted); font-size: 1rem; }

/* ------------------------------------------------------------ status tiles */

.status-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.stat { background: var(--glass2); border: 1px solid rgba(255, 255, 255, .14); border-radius: 18px; padding: 13px; min-height: 78px; display: flex; flex-direction: column; justify-content: center; }
.label { font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: #bfe9ef; }
.value { font-size: 1.45rem; margin-top: 5px; font-weight: 600; font-variant-numeric: tabular-nums; }

/* ------------------------------------------------------------------ stage */

.breathing-stage { display: grid; place-items: center; min-height: 340px; padding: 8px 0; }
.ring-wrap { width: min(330px, 74vw); aspect-ratio: 1; display: grid; place-items: center; position: relative; }

.progress-ring { position: absolute; inset: 0; width: 100%; height: 100%; transform: rotate(-90deg); }
.progress-ring .track { fill: none; stroke: rgba(255, 255, 255, .16); stroke-width: 3; }
.progress-ring .bar { fill: none; stroke: var(--accent); stroke-width: 3; stroke-linecap: round; filter: drop-shadow(0 0 6px rgba(158, 232, 255, .6)); }

.ring-bg { position: absolute; inset: 8%; border-radius: 50%; border: 1px solid rgba(255, 255, 255, .22); box-shadow: inset 0 0 50px rgba(255, 255, 255, .1), 0 0 70px rgba(158, 232, 255, .16); }

.breath-circle {
  width: 58%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, rgba(255, 255, 255, .78), rgba(158, 232, 255, .34) 38%, rgba(255, 255, 255, .1) 70%);
  display: grid;
  place-items: center;
  box-shadow: 0 0 40px rgba(158, 232, 255, .28);
  will-change: transform;
}

.breath-icon { font-size: clamp(2.4rem, 9vw, 3.8rem); line-height: 1; filter: drop-shadow(0 8px 16px rgba(0, 0, 0, .2)); }
.countdown { font-size: 3.4rem; font-weight: 700; color: #0a2c3c; }

.instruction { text-align: center; min-height: 96px; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 6px; }
.phase { font-size: clamp(1.8rem, 4.4vw, 3rem); font-weight: 700; letter-spacing: -.03em; }
.phase-sub { color: var(--muted); min-height: 24px; font-size: .98rem; }

/* --------------------------------------------------------------- controls */

.controls { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; align-items: center; }
button, select, input[type="number"] { font: inherit; border: 0; border-radius: 999px; padding: 12px 18px; font-size: 1rem; }

select, input[type="number"] {
  background: rgba(255, 255, 255, .16);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .24);
  outline: none;
}
select option { color: #10222e; }

button {
  background: var(--accent);
  color: #06283a;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 28px rgba(0, 0, 0, .18);
  transition: transform .2s, opacity .2s, background .2s;
}
button:hover:not(:disabled) { transform: translateY(-1px); }
button.secondary { background: rgba(255, 255, 255, .14); color: #fff; border: 1px solid rgba(255, 255, 255, .24); box-shadow: none; }
button.green { background: var(--accent2); color: #08351d; }
button.danger { background: rgba(255, 150, 150, .16); color: #ffd9d9; border: 1px solid rgba(255, 160, 160, .3); box-shadow: none; }
button:disabled { opacity: .5; cursor: not-allowed; transform: none; }
button.small { padding: 8px 14px; font-size: .88rem; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ------------------------------------------------------------------- tabs */

.tabs { display: flex; gap: 6px; background: rgba(0, 0, 0, .18); border: 1px solid var(--line); border-radius: 999px; padding: 5px; }
.tabs button {
  flex: 1;
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  padding: 9px 6px;
  font-size: .88rem;
  font-weight: 600;
  box-shadow: none;
}
.tabs button[aria-selected="true"] { background: rgba(255, 255, 255, .92); color: #09303f; }

.tabpanel { display: none; flex-direction: column; gap: 14px; overflow-y: auto; flex: 1; padding-right: 4px; }
.tabpanel.active { display: flex; }
.tabpanel::-webkit-scrollbar { width: 6px; }
.tabpanel::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, .2); border-radius: 99px; }

.card { background: rgba(0, 0, 0, .16); border: 1px solid rgba(255, 255, 255, .14); border-radius: 22px; padding: 17px; }
.card h2 { margin: 0 0 6px; font-size: 1.15rem; }
.note { color: var(--muted); line-height: 1.45; margin: 0; font-size: .9rem; }
.tiny { font-size: .78rem; color: #b8dbe3; line-height: 1.45; }

/* --------------------------------------------------------- pattern picker */

.pattern-list { display: flex; flex-direction: column; gap: 9px; }
.pattern {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 12px;
  align-items: center;
  text-align: left;
  width: 100%;
  background: rgba(255, 255, 255, .07);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 13px 15px;
  color: var(--text);
  font-weight: 500;
  box-shadow: none;
  cursor: pointer;
}
.pattern:hover { background: rgba(255, 255, 255, .12); transform: none; }
.pattern[aria-pressed="true"] { background: rgba(213, 247, 255, .9); color: #09303f; border-color: transparent; }
.pattern[aria-pressed="true"] .pattern-tag { color: #0d4054; }
.pattern[aria-pressed="true"] .pattern-timing { background: rgba(9, 48, 63, .12); color: #09303f; }
.pattern-name { font-weight: 700; font-size: 1rem; }
.pattern-tag { grid-column: 1; font-size: .82rem; color: var(--muted); font-weight: 400; }
.pattern-timing { grid-column: 2; grid-row: 1 / span 2; font-variant-numeric: tabular-nums; font-size: .85rem; background: rgba(255, 255, 255, .12); border-radius: 999px; padding: 6px 11px; white-space: nowrap; }

.custom-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 12px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field span { font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: #bfe9ef; }
.field input { border-radius: 14px; padding: 9px 12px; width: 100%; }

/* ------------------------------------------------------------------ sound */

.row { display: flex; gap: 8px; flex-wrap: wrap; }
.pill { border: 1px solid var(--line); background: rgba(255, 255, 255, .1); color: #fff; border-radius: 999px; padding: 9px 13px; cursor: pointer; font-size: .9rem; box-shadow: none; }
.pill[aria-pressed="true"] { background: #d5f7ff; color: #09303f; font-weight: 700; }

.slider-row { display: flex; align-items: center; gap: 12px; margin-top: 14px; }
input[type="range"] { flex: 1; accent-color: var(--accent); }

.toggle { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid rgba(255, 255, 255, .09); cursor: pointer; }
.toggle:last-child { border-bottom: 0; }
.toggle-text { display: flex; flex-direction: column; gap: 2px; }
.toggle-text strong { font-weight: 600; font-size: .95rem; }
.toggle-text span { font-size: .78rem; color: var(--muted); }
.switch { width: 46px; height: 27px; border-radius: 999px; background: rgba(255, 255, 255, .18); border: 1px solid var(--line); position: relative; flex: none; transition: background .2s; }
.switch::after { content: ""; position: absolute; top: 2px; left: 2px; width: 21px; height: 21px; border-radius: 50%; background: #fff; transition: transform .2s; }
.toggle input { position: absolute; opacity: 0; pointer-events: none; }
.toggle input:checked + .switch { background: var(--accent); }
.toggle input:checked + .switch::after { transform: translateX(19px); }
.toggle input:focus-visible + .switch { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------------------------------------------------------------- history */

.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.stat-mini { background: rgba(255, 255, 255, .07); border: 1px solid rgba(255, 255, 255, .12); border-radius: 16px; padding: 12px; }
.stat-mini .value { font-size: 1.3rem; }

table { width: 100%; border-collapse: collapse; font-size: .85rem; margin-top: 10px; }
th, td { padding: 8px 6px; border-bottom: 1px solid rgba(255, 255, 255, .12); text-align: left; vertical-align: top; }
th { color: #bfe9ef; font-weight: 600; }
td.num { font-variant-numeric: tabular-nums; }
.empty { color: var(--muted); padding: 14px 0; font-size: .9rem; }

.badge { display: inline-block; font-size: .7rem; padding: 2px 8px; border-radius: 999px; background: rgba(199, 255, 216, .18); color: var(--accent2); border: 1px solid rgba(199, 255, 216, .28); }

ol.steps { margin: 10px 0 0; padding-left: 20px; color: var(--muted); font-size: .88rem; line-height: 1.6; }
ol.steps code { background: rgba(255, 255, 255, .12); padding: 1px 6px; border-radius: 6px; font-size: .85em; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translate(-50%, 20px);
  background: rgba(8, 32, 44, .94);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 12px 20px;
  border-radius: 999px;
  font-size: .9rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s, transform .25s;
  z-index: 10;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ----------------------------------------------------------- adaptations */

@media (max-width: 940px) {
  .shell { grid-template-columns: 1fr; }
  .main, .side { min-height: auto; }
  .side { max-height: none; }
  .tabpanel { overflow: visible; }
  .page { padding: 14px; padding-bottom: max(14px, env(safe-area-inset-bottom)); }
  .main { padding: 22px; }
  .side { padding: 18px; }
  .breathing-stage { min-height: 290px; }
}

/* On a phone the whole practice panel has to fit above the fold — reaching for
   Start should not mean scrolling. Everything below trims vertical space. */
@media (max-width: 560px) {
  .main { padding: 18px; gap: 13px; }
  .title { font-size: 1.7rem; }
  .subtitle { font-size: .88rem; margin-top: 4px; }
  .status-row { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .stat { min-height: 62px; padding: 9px 10px; border-radius: 15px; }
  .label { font-size: .62rem; letter-spacing: .07em; }
  .value { font-size: 1.1rem; margin-top: 3px; }
  .breathing-stage { min-height: 0; padding: 0; }
  .ring-wrap { width: min(255px, 62vw); }
  .instruction { min-height: 70px; gap: 2px; }
  .phase { font-size: 1.65rem; }
  .phase-sub { font-size: .85rem; }
  .controls { gap: 8px; }
  button, select { padding: 11px 15px; font-size: .95rem; }
}

/* Short viewports — a phone in Safari with its address bar showing, or any
   landscape phone. The ring gives up space first; the controls never do. */
@media (max-width: 560px) and (max-height: 800px) {
  .main { padding: 15px; gap: 10px; }
  .title { font-size: 1.45rem; }
  .ring-wrap { width: min(200px, 50vw); }
  .instruction { min-height: 56px; }
  .phase { font-size: 1.4rem; }
  .phase-sub { font-size: .8rem; }
  .stat { min-height: 54px; }
}

@media (prefers-reduced-motion: reduce) {
  .orb { animation: none; }
  .breath-circle { transition: none; }
}