/* ============================================================
   Breathfine — design system
   Palette: soft warm white ground, sage green motion,
   forest green for anything that has to be read.
   ============================================================ */

:root {
  /* Surfaces */
  --background: #f7f8f5;        /* soft warm white   */
  --background-alt: #e8f0ea;    /* pale sage         */
  --surface: #ffffff;           /* pure white        */
  --surface-hi: #e8f0ea;
  --line: #dce5df;              /* soft grey-green   */
  --track: #dce5df;             /* progress track    */

  /* Text */
  --text: #26332e;              /* deep charcoal     */
  --muted: #718078;             /* muted sage grey   */
  --faint: #8c9a92;             /* lighter tint of the muted sage, for labels */

  /* Accent */
  --primary: #7faf91;           /* sage green — fills, rings, motion */
  --deep: #355c4a;              /* forest green — text on light, buttons */
  --primary-soft: rgba(127, 175, 145, 0.18);
  --primary-wash: rgba(127, 175, 145, 0.08);

  /* Shape + motion */
  --radius: 22px;
  --radius-sm: 14px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --shadow: 0 2px 10px rgba(38, 51, 46, 0.05);
  --shadow-lift: 0 10px 28px rgba(53, 92, 74, 0.11);

  /* Type */
  --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, "URW Palladio L", Georgia, serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, "Roboto Mono", monospace;

  /* Rhythm — gutter scales with the viewport instead of stepping at breakpoints */
  --gutter: clamp(14px, 4vw, 32px);
  --maxw: 860px;
  --tap: 48px;              /* minimum comfortable tap target */
}

/* ============================================================ Base */

*, *::before, *::after { box-sizing: border-box; }

/* The hidden attribute must beat any component display rule
   (.paused-veil, .sheet and .practice all set their own display). */
[hidden] { display: none !important; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--background);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 { margin: 0; font-weight: 400; letter-spacing: -0.01em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* Ambient wash — a soft sage bloom behind everything -------------------- */
.ambient {
  position: fixed;
  inset: -20%;
  z-index: -1;
  background:
    radial-gradient(44% 34% at 50% 16%, var(--primary-soft), transparent 70%),
    radial-gradient(58% 46% at 8% 96%, rgba(232, 240, 234, 0.9), transparent 72%),
    linear-gradient(180deg, var(--background) 0%, var(--background-alt) 100%);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  padding: 10px 16px;
  background: var(--deep);
  color: #fff;
  border-radius: var(--radius-sm);
  z-index: 50;
}
.skip-link:focus { left: 12px; }

:focus-visible {
  outline: 2px solid var(--deep);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ============================================================ Top bar */

/* Sticky, translucent, with a hairline that only appears once you scroll. */
.topbar {
  position: sticky;
  top: 0;
  z-index: 25;
  background: rgba(247, 248, 245, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.topbar.scrolled {
  border-bottom-color: var(--line);
  background: rgba(247, 248, 245, 0.94);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: max(12px, env(safe-area-inset-top)) var(--gutter) 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px;
  margin-left: -4px;
  border: none;
  background: none;
  font: inherit;
  cursor: pointer;
}
.brand-mark {
  width: 30px;
  height: 30px;
  flex: none;
  transition: transform 0.5s var(--ease);
}
.brand:hover .brand-mark { transform: rotate(-8deg) scale(1.04); }
.reduced .brand:hover .brand-mark { transform: none; }

.topbar-actions { display: flex; align-items: center; gap: 8px; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding-inline: 14px;
}
.icon-btn svg { width: 17px; height: 17px; flex: none; }

.brand-text {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--deep);
}

body[data-screen="session"] .topbar { display: none; }

/* ============================================================ Screens */

.screen { display: none; }
.screen.is-active { display: block; animation: rise 0.5s var(--ease) both; }

@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

#screen-home, #screen-detail, #screen-complete,
#screen-install, #screen-privacy, #screen-terms {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter) 64px;
}

/* ============================================================ Home */

.hero { padding: 26px 0 30px; }

.eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 18px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.3rem, 10vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--deep);
}

.hero-sub {
  margin-top: 18px;
  max-width: 46ch;
  color: var(--muted);
}

.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 12px;
}

/* Practice stats -------------------------------------------------------- */
.practice {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 34px;
}

.practice-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px 12px;
  margin: 0;
}
.practice-grid > div { min-width: 0; }
.practice-grid dt {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}
.practice-grid dd {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--deep);
}
.practice-grid dd small { font-size: 0.85rem; color: var(--muted); }

/* Mode cards ------------------------------------------------------------ */
.mode-grid { display: grid; gap: 12px; }

.mode-card {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  width: 100%;
  height: 100%;
  text-align: left;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--text);
  font: inherit;
  cursor: pointer;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}
.mode-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lift);
  transform: translateY(-2px);
}
.mode-card:active { transform: translateY(0); }

.mode-icon {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--background-alt);
  color: var(--deep);
}
.mode-icon svg { width: 22px; height: 22px; }

.mode-name {
  display: block;
  font-family: var(--font-display);
  font-size: 1.3rem;
  line-height: 1.2;
  color: var(--deep);
}
.mode-desc { display: block; color: var(--muted); font-size: 0.94rem; margin-top: 4px; }

.mode-meta {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--primary);
}

/* Four-phase strip on each card */
.card-pattern {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-top: 12px;
}
.card-cell {
  padding: 7px 4px;
  border-radius: 10px;
  background: var(--primary-wash);
  text-align: center;
  line-height: 1.25;
}
.card-cell.is-zero { background: transparent; box-shadow: inset 0 0 0 1px var(--line); }
.card-cell b {
  display: block;
  font-size: 0.56rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--faint);
}
.card-cell span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--deep);
}
.card-cell.is-zero span { color: var(--faint); }

.mode-go {
  margin-top: 14px;
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}
.mode-card:hover .mode-go { color: var(--deep); }

/* ============================================================ Buttons */

.primary-btn {
  width: 100%;
  padding: 17px 22px;
  border: none;
  border-radius: 999px;
  background: var(--deep);
  color: #fff;
  font: inherit;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(53, 92, 74, 0.22);
  transition: filter 0.25s var(--ease), transform 0.25s var(--ease);
}
.primary-btn:hover { filter: brightness(1.14); }
.primary-btn:active { transform: scale(0.99); }

.ghost-btn {
  min-height: var(--tap);
  padding: 12px 20px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.ghost-btn:hover { color: var(--deep); border-color: var(--primary); }
.ghost-btn.tiny { margin-top: 16px; font-size: 0.78rem; padding: 8px 14px; }

.back-btn {
  margin: 8px 0 20px;
  min-height: var(--tap);
  padding: 8px 0;
  border: none;
  background: none;
  color: var(--muted);
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
}
.back-btn::before { content: "← "; }
.back-btn:hover { color: var(--deep); }

/* ============================================================ Detail */

.detail-head { display: flex; gap: 16px; align-items: center; }

.detail-icon {
  width: 54px; height: 54px;
  flex: none;
  display: grid; place-items: center;
  border-radius: 50%;
  background: var(--background-alt);
  color: var(--deep);
}
.detail-icon svg { width: 28px; height: 28px; }

.detail h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 7vw, 2.5rem);
  line-height: 1.1;
  color: var(--deep);
}
.detail-tagline { color: var(--muted); margin-top: 4px; }

.pattern-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin: 26px 0 30px;
}
.pattern-cell {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 14px 10px;
  text-align: center;
}
.pattern-cell.is-zero { box-shadow: none; background: transparent; }
.pattern-cell dt {
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}
.pattern-cell dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--deep);
}
.pattern-cell.is-zero dd { color: var(--faint); }
.pattern-cell dd span { font-size: 0.72rem; color: var(--muted); }

.detail-body {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.detail-body-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--deep);
  margin-bottom: 20px;
}

.detail-block { margin-bottom: 24px; }
.detail-block p { color: var(--muted); }

.caution {
  border-left: 3px solid var(--primary);
  background: var(--primary-wash);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 16px;
  margin-bottom: 12px;
  color: var(--text);
  font-size: 0.92rem;
}

.duration { border: none; margin: 32px 0 26px; padding: 0; }
.duration legend { padding: 0; }

.duration-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }

.duration-opt {
  min-height: var(--tap);
  padding: 14px 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--muted);
  font: inherit;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.25s var(--ease);
}
.duration-opt:hover { color: var(--deep); border-color: var(--primary); }
.duration-opt[aria-checked="true"] {
  background: var(--deep);
  border-color: var(--deep);
  color: #fff;
}

.hint, .setting-hint { font-size: 0.82rem; color: var(--faint); margin-top: 10px; }

.disclaimer {
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--muted);
}

/* ============================================================ Session */

.session.is-active {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  padding:
    max(16px, env(safe-area-inset-top)) var(--gutter)
    max(18px, env(safe-area-inset-bottom));
}

.session-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.session-mode {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: var(--deep);
}
.session-clock { text-align: right; line-height: 1.3; }
.session-clock-label {
  display: block;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}
.session-clock .mono { font-size: 1.05rem; color: var(--text); }

/* Stage ----------------------------------------------------------------- */
.stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  min-height: 0;
}

.orb-wrap {
  position: relative;
  width: min(78vw, 42vh);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}

.halo {
  position: absolute;
  inset: 8%;
  border-radius: 50%;
  border: 1px solid var(--line);
}

.orb {
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  background:
    radial-gradient(circle at 36% 30%, #ffffff 0%, rgba(255, 255, 255, 0) 58%),
    linear-gradient(155deg, #a8ccb5 0%, var(--primary) 52%, #6ea482 100%);
  box-shadow: 0 12px 40px rgba(53, 92, 74, 0.18);
  transform: scale(0.6);
  will-change: transform;
}

.ring {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
  overflow: visible;
}
.ring-track {
  fill: none;
  stroke: var(--track);
  stroke-width: 3;
}
.ring-progress {
  fill: none;
  stroke: var(--primary);
  stroke-width: 4;
  stroke-linecap: round;
}

.readout { position: relative; text-align: center; }
.phase {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 4.6vw, 1.5rem);
  letter-spacing: 0.24em;
  text-indent: 0.24em;
  color: #ffffff;
  text-shadow: 0 1px 6px rgba(38, 51, 46, 0.28);
}
.count {
  font-size: clamp(3rem, 13vw, 4rem);
  font-weight: 300;
  line-height: 1.1;
  margin-top: 6px;
  color: #ffffff;
  text-shadow: 0 2px 10px rgba(38, 51, 46, 0.3);
}

/* Countdown state: the circle waits, quieter than an active phase. */
.lead .orb { opacity: 0.72; }
.lead .ring-progress { stroke: var(--track); }
.lead .phase { letter-spacing: 0.18em; text-indent: 0.18em; }
.lead .count { font-size: clamp(3.4rem, 16vw, 5rem); }

.next-phase {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

/* Bottom block ---------------------------------------------------------- */
.session-bottom { display: grid; gap: 18px; }

.session-progress-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.session-progress-head .section-label { margin: 0; }
.session-progress-head .mono { font-size: 0.82rem; color: var(--muted); }

.bar {
  height: 4px;
  margin-top: 10px;
  border-radius: 999px;
  background: var(--track);
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: var(--primary);
}

.controls { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }

.control {
  padding: 15px 4px;
  min-height: 52px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--muted);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.control:hover { color: var(--deep); border-color: var(--primary); }
.control[aria-pressed="true"] { color: var(--deep); border-color: var(--primary); background: var(--primary-soft); }

.keyhint {
  text-align: center;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--faint);
}

.paused-veil {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 22px;
  padding: var(--gutter);
  background: rgba(247, 248, 245, 0.9);
  backdrop-filter: blur(8px);
}
.paused-veil p {
  font-family: var(--font-display);
  font-size: 2rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--deep);
}
.paused-veil .primary-btn { width: auto; padding-inline: 46px; }

/* ============================================================ Complete */

.complete.is-active { display: grid; place-items: center; min-height: 80vh; min-height: 80dvh; }
.complete-inner { text-align: center; width: 100%; }

.complete-mark {
  width: 96px; height: 96px;
  margin: 0 auto 26px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 36% 30%, #ffffff 0%, rgba(255, 255, 255, 0) 58%),
    linear-gradient(155deg, #a8ccb5, var(--primary));
  box-shadow: 0 10px 30px rgba(53, 92, 74, 0.18);
  animation: settle 2.4s var(--ease) both;
}
@keyframes settle {
  from { transform: scale(0.7); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

.complete h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vw, 2.8rem);
  color: var(--deep);
}
.complete-line { color: var(--muted); margin-top: 12px; }

.summary {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 34px 0;
  text-align: left;
}
.summary > div {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 14px 16px;
}
.summary dt {
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}
.summary dd {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--deep);
}

.complete-actions { display: grid; gap: 10px; justify-items: center; }
.complete-actions .ghost-btn { width: 100%; }

/* ============================================================ Text pages */

.page h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 7vw, 2.4rem);
  line-height: 1.15;
  color: var(--deep);
}
.page-lede {
  margin-top: 12px;
  color: var(--muted);
  font-size: 1.02rem;
  max-width: 60ch;
}
.page-h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--deep);
  margin: 30px 0 8px;
}
.page p { color: var(--muted); max-width: 66ch; }
.page strong { color: var(--text); font-weight: 600; }

.steps {
  margin: 8px 0 0;
  padding-left: 1.25em;
  color: var(--muted);
  max-width: 66ch;
}
.steps li { margin-bottom: 8px; }
.steps li::marker { color: var(--primary); font-family: var(--font-mono); }

.page-note {
  margin-top: 16px;
  padding: 14px 16px;
  border-left: 3px solid var(--primary);
  background: var(--primary-wash);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.92rem;
}

/* ============================================================ Footer */

.site-footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 32px var(--gutter) max(34px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  text-align: center;
}
body[data-screen="session"] .site-footer { display: none; }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px 8px;
  margin-bottom: 18px;
}
.footer-link {
  min-height: 40px;
  padding: 8px 6px;
  border: none;
  background: none;
  font: inherit;
  font-size: 0.86rem;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.footer-link:hover { color: var(--deep); border-bottom-color: var(--primary); }
.footer-dot { color: var(--line); }

.footer-copy {
  font-size: 0.8rem;
  color: var(--faint);
}
.footer-made {
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}
.footer-heart {
  display: inline-block;
  margin: 0 1px;
  animation: heartbeat 2.6s var(--ease) infinite;
}
@keyframes heartbeat {
  0%, 72%, 100% { transform: scale(1); }
  78%           { transform: scale(1.16); }
  84%           { transform: scale(1); }
  90%           { transform: scale(1.1); }
}
.reduced .footer-heart { animation: none; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================ Settings sheet */

.sheet-backdrop {
  position: fixed;
  inset: 0;
  z-index: 30;
  background: rgba(38, 51, 46, 0.28);
  backdrop-filter: blur(3px);
}

.sheet {
  position: fixed;
  z-index: 31;
  left: 0; right: 0; bottom: 0;
  max-height: 88vh;
  max-height: 88dvh;
  overflow-y: auto;
  padding: 22px var(--gutter) max(28px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  border-radius: 26px 26px 0 0;
  background: var(--surface);
  box-shadow: 0 -12px 40px rgba(38, 51, 46, 0.12);
  animation: sheet-in 0.35s var(--ease) both;
}
@keyframes sheet-in { from { transform: translateY(100%); } to { transform: none; } }

.sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.sheet-head h2 { font-family: var(--font-display); font-size: 1.4rem; color: var(--deep); }

.setting {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.setting-label { font-size: 0.98rem; }

.sheet select {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--background);
  color: var(--text);
  font: inherit;
}

.toggle {
  flex: none;
  width: 54px; height: 32px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--track);
  cursor: pointer;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}
.toggle span {
  display: block;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(38, 51, 46, 0.25);
  transition: transform 0.3s var(--ease);
}
.toggle[aria-checked="true"] { background: var(--primary); border-color: var(--primary); }
.toggle[aria-checked="true"] span { transform: translateX(22px); }
.sheet select { min-height: var(--tap); }

.setting-hint { margin-top: -6px; }

/* Volume slider */
.sheet input[type="range"] {
  flex: none;
  width: 150px;
  height: var(--tap);
  accent-color: var(--primary);
  background: transparent;
  cursor: pointer;
}
.sheet input[type="range"]:disabled { opacity: 0.4; cursor: default; }

/* ============================================================ Responsive */

/* Very small phones (iPhone SE and narrower) */
@media (max-width: 420px) {
  .icon-btn-text { display: none; }
  .icon-btn { padding-inline: 12px; }
  .ghost-btn { padding-inline: 14px; }
}

@media (max-width: 360px) {
  .controls { grid-template-columns: repeat(2, 1fr); }
  .brand-text { font-size: 1rem; }
  .card-cell b { font-size: 0.52rem; letter-spacing: 0.06em; }
  .duration-opt { font-size: 0.85rem; }
  .keyhint { display: none; }
}

/* Large phones and up: two columns of practices */
@media (min-width: 560px) {
  .mode-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .practice-grid { grid-template-columns: repeat(4, 1fr); }
  .complete-actions { grid-auto-flow: column; }
  .complete-actions .ghost-btn, .complete-actions .primary-btn { width: auto; padding-inline: 34px; }
  .detail-start-wide { max-width: 320px; }
}

/* Tablets: centre the sheet as a dialog */
@media (min-width: 700px) {
  .sheet {
    left: 50%; right: auto; bottom: auto; top: 50%;
    width: min(520px, 92vw);
    transform: translate(-50%, -50%);
    border: 1px solid var(--line);
    border-radius: var(--radius);
  }
  @keyframes sheet-in {
    from { opacity: 0; transform: translate(-50%, -46%); }
    to   { opacity: 1; transform: translate(-50%, -50%); }
  }
  .hero { padding: 48px 0 36px; }
  #screen-detail .primary-btn { max-width: 360px; }
}

/* Desktop: three columns, roomier session */
@media (min-width: 1000px) {
  :root { --maxw: 980px; }
  .mode-grid { grid-template-columns: repeat(3, 1fr); }
  .session.is-active { max-width: 620px; margin: 0 auto; }
  .orb-wrap { width: min(50vh, 440px); }
  .hero { padding: 60px 0 44px; }
}

/* Landscape phones: side-by-side so nothing needs scrolling mid-session */
@media (max-height: 560px) and (orientation: landscape) {
  .session.is-active { padding-block: 10px; }
  .stage { flex-direction: row; gap: 26px; }
  .orb-wrap { width: min(34vw, 74vh); }
  .next-phase { writing-mode: horizontal-tb; }
  .controls .control { min-height: 44px; padding-block: 10px; }
  .keyhint { display: none; }
  .session-bottom { gap: 10px; }
}

/* Tall, narrow phones get a slightly bigger circle */
@media (min-height: 780px) and (max-width: 560px) {
  .orb-wrap { width: min(84vw, 46vh); }
}

/* ============================================================ Reduced motion */

.reduced .orb { transform: scale(0.86) !important; transition: none; }
.reduced .screen.is-active,
.reduced .complete-mark,
.reduced .sheet { animation: none; }
.reduced .mode-card:hover { transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}