/* 息 · 自然呼吸 — 单一清新风格，无第三方 */

:root {
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out-soft: cubic-bezier(0.45, 0, 0.55, 1);
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", monospace;
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  /* 颜色变量见 themes.css（body[data-color]） */
}

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

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  color: var(--text);
  background: var(--bg-page);
}

body {
  overflow-x: hidden;
}

.app {
  position: relative;
  min-height: 100vh;
  padding: clamp(20px, 4vw, 36px);
  padding-bottom: max(28px, env(safe-area-inset-bottom));
}

.bg-layer {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 100% 70% at 10% 0%, var(--bg-glow-a), transparent 52%),
    radial-gradient(ellipse 80% 55% at 95% 15%, var(--bg-glow-b), transparent 48%),
    radial-gradient(ellipse 70% 50% at 50% 100%, var(--bg-glow-c), transparent 55%),
    var(--bg-page);
}

.bg-blobs {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(48px);
  opacity: 0.55;
  animation: blob-drift 22s var(--ease-in-out-soft) infinite;
}

.blob-a {
  width: min(45vw, 320px);
  height: min(45vw, 320px);
  background: var(--blob-a);
  top: -5%;
  right: -8%;
  animation-delay: 0s;
}

.blob-b {
  width: min(38vw, 280px);
  height: min(38vw, 280px);
  background: var(--blob-b);
  bottom: 10%;
  left: -10%;
  animation-delay: -7s;
}

.blob-c {
  width: min(30vw, 200px);
  height: min(30vw, 200px);
  background: var(--blob-c);
  top: 42%;
  left: 35%;
  animation-delay: -14s;
}

@keyframes blob-drift {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(2%, 3%) scale(1.04);
  }
  66% {
    transform: translate(-2%, 1%) scale(0.98);
  }
}

.top {
  position: relative;
  z-index: 4;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  max-width: 1200px;
  margin: 0 auto clamp(24px, 4vw, 40px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  text-align: left;
  flex: 1;
  min-width: 0;
}

.settings-wrap {
  flex-shrink: 0;
}

.settings-trigger {
  box-sizing: border-box;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border-soft);
  background: rgba(255, 255, 255, 0.75);
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s, transform 0.2s var(--ease-out-expo);
}

.settings-trigger:hover {
  background: #fff;
  box-shadow: 0 4px 16px var(--shadow-ui);
}

.settings-trigger:active {
  transform: scale(0.96);
}

.settings-trigger[aria-expanded="true"] {
  background: var(--settings-expanded-bg);
  border-color: var(--settings-expanded-border);
}

.settings-trigger:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.settings-trigger-icon {
  display: block;
  flex-shrink: 0;
  opacity: 0.92;
}

/* 配置弹窗：遮罩 + 面板（手机全宽留白，桌面居中） */
.settings-modal-layer:not([hidden]) {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0;
}

@media (min-width: 600px) {
  .settings-modal-layer:not([hidden]) {
    align-items: center;
    padding: max(20px, env(safe-area-inset-top)) max(20px, env(safe-area-inset-right)) max(20px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
  }
}

.settings-modal-backdrop {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 0;
  background: color-mix(in srgb, var(--text) 32%, transparent);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

@supports not (background: color-mix(in srgb, red, blue)) {
  .settings-modal-backdrop {
    background: rgba(30, 40, 36, 0.38);
  }
}

.settings-modal-panel {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  max-height: min(88vh, 640px);
  max-height: min(88dvh, 640px);
  display: flex;
  flex-direction: column;
  margin: 0 auto;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid var(--border-soft);
  border-bottom: none;
  box-shadow: var(--shadow-card), 0 -8px 40px var(--popover-extra-shadow);
  outline: none;
}

@media (min-width: 600px) {
  .settings-modal-panel {
    width: min(100%, 400px);
    max-height: min(82vh, 560px);
    max-height: min(82dvh, 560px);
    border-radius: var(--radius-xl);
    border-bottom: 1px solid var(--border-soft);
    box-shadow: var(--shadow-card), 0 20px 50px var(--popover-extra-shadow);
  }
}

.settings-modal-header {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 16px 12px 20px;
  border-bottom: 1px solid var(--border-soft);
}

.settings-modal-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--text);
}

.settings-modal-close {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.settings-modal-close:hover {
  background: color-mix(in srgb, var(--text) 6%, transparent);
  color: var(--text);
}

@supports not (background: color-mix(in srgb, red, blue)) {
  .settings-modal-close:hover {
    background: rgba(0, 0, 0, 0.06);
  }
}

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

.settings-modal-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding: 12px 12px calc(16px + env(safe-area-inset-bottom, 0px));
}

.settings-popover-title {
  margin: 0 8px 10px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.settings-popover-follow {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border-soft);
}

.sound-mode-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.sound-mode-list > li {
  min-width: 0;
}

@media (max-width: 340px) {
  .sound-mode-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.sound-mode-item {
  box-sizing: border-box;
  width: 100%;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 6px;
  padding: 8px 8px;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text);
  font-size: 0.76rem;
  font-weight: 600;
  text-align: left;
  line-height: 1.25;
  cursor: pointer;
  transition: background 0.2s;
}

.sound-mode-item > span:last-child {
  flex: 1;
  min-width: 0;
  word-break: break-word;
}

.sound-mode-item:hover {
  background: var(--sound-hover-bg);
}

.sound-mode-item.is-active {
  background: var(--sound-active-bg);
  color: var(--accent);
}

.sound-mode-item .smi-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 2px solid var(--border-soft);
  flex-shrink: 0;
}

.sound-mode-item.is-active .smi-dot {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 0 0 2px var(--sound-dot-glow);
}

.settings-volume-label {
  display: block;
  margin: 0 8px 10px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.settings-volume-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 4px;
  min-height: 36px;
}

.settings-volume-row input[type="range"] {
  flex: 1;
  min-width: 0;
  height: 18px;
  margin: 0;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  cursor: pointer;
}

.settings-volume-row input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 999px;
  background: var(--progress-track-bg);
}

.settings-volume-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  margin-top: -6px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.95);
  background: var(--accent);
  box-shadow: 0 2px 8px var(--sound-dot-glow);
  cursor: pointer;
}

.settings-volume-row input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.95);
  background: var(--accent);
  box-shadow: 0 2px 8px var(--sound-dot-glow);
  cursor: pointer;
}

.settings-volume-row input[type="range"]::-moz-range-track {
  height: 6px;
  border-radius: 999px;
  background: var(--progress-track-bg);
}

.settings-volume-value {
  flex-shrink: 0;
  min-width: 2.75em;
  font-size: 0.78rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  text-align: right;
}

.brand-mark {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  border-radius: 18px;
  background: linear-gradient(145deg, var(--accent-soft), var(--accent));
  box-shadow: var(--shadow-float);
  position: relative;
  overflow: hidden;
}

.brand-mark::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 32px;
  left: 50%;
  top: 46%;
  transform: translate(-50%, -50%) rotate(-18deg);
  border-radius: 0 100% 0 100%;
  background: rgba(255, 255, 255, 0.45);
}

.brand-text h1 {
  margin: 0;
  font-size: clamp(1.4rem, 3.5vw, 1.65rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text);
}

.tagline {
  margin: 6px 0 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 500;
}

.layout {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(240px, 290px) minmax(0, 1fr) minmax(240px, 310px);
  gap: clamp(18px, 2.5vw, 26px);
  max-width: 1200px;
  margin: 0 auto;
  align-items: start;
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

.panel {
  padding: 22px 22px 24px;
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.panel-title {
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-soft);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--accent);
}

.method-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: min(56vh, 500px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-soft) transparent;
}

.method-item {
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.55);
  color: inherit;
  cursor: pointer;
  transition: border-color 0.3s var(--ease-out-expo), background 0.3s var(--ease-out-expo), box-shadow 0.3s;
}

.method-item:hover {
  border-color: var(--border-soft);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 4px 16px var(--method-hover-shadow);
}

.method-item.is-selected {
  border-color: var(--method-selected-border);
  background: var(--method-selected-bg);
  box-shadow: 0 6px 20px var(--method-selected-shadow);
}

.method-item .mi-name {
  display: block;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
}

.method-item .mi-sub {
  display: block;
  margin-top: 5px;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.methods .methods-top {
  display: block;
}

.btn-method-change {
  display: none;
}

.method-one-line {
  display: none;
  margin: 0;
  padding: 0;
  font-size: 0.86rem;
  line-height: 1.45;
  color: var(--text);
}

.method-one-line-name {
  display: block;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
}

.method-one-line-sub {
  display: block;
  margin-top: 4px;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.45;
}

@media (max-width: 960px) {
  .methods .methods-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 0;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-soft);
  }

  .methods .methods-top .panel-title {
    margin: 0;
    padding: 0;
    border: none;
    flex: 1;
    min-width: 0;
  }

  .btn-method-change {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 8px 16px;
    border-radius: 999px;
    border: 1px solid var(--border-soft);
    background: rgba(255, 255, 255, 0.78);
    color: var(--accent);
    font: inherit;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition: background 0.2s, box-shadow 0.2s;
  }

  .btn-method-change:hover {
    background: #fff;
    box-shadow: 0 2px 12px var(--method-hover-shadow);
  }

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

  .btn-method-change:active {
    transform: scale(0.98);
  }

  .method-one-line {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin: 12px 0 0;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.55);
    border: 1px solid var(--method-selected-border);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
  }

  .method-one-line:active {
    transform: scale(0.99);
    background: rgba(255, 255, 255, 0.82);
  }

  .method-one-line:focus {
    outline: none;
  }

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

  .methods.is-method-picker-open .method-one-line {
    display: none;
  }

  .methods:not(.is-method-picker-open) .method-list {
    display: none !important;
  }

  .methods.is-method-picker-open .method-list {
    display: flex !important;
    flex-direction: column;
    margin-top: 10px;
    max-height: min(52vh, 440px);
  }
}

@media (min-width: 961px) {
  .methods .methods-top .panel-title {
    margin: 0 0 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-soft);
  }
}

.stage {
  min-height: 440px;
}

.stage-card {
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  padding: clamp(8px, 2vw, 12px);
}

.stage:not(.breathing-active) .orb-core {
  animation: orb-breathe-idle 6s var(--ease-in-out-soft) infinite;
}

.stage:not(.breathing-active) .orb-glow {
  animation: orb-glow-idle 6s var(--ease-in-out-soft) infinite;
}

.stage.breathing-active .orb-core,
.stage.breathing-active .orb-glow {
  animation: none;
}

@keyframes orb-breathe-idle {
  0%, 100% {
    transform: scale(0.88);
  }
  50% {
    transform: scale(0.945);
  }
}

@keyframes orb-glow-idle {
  0%, 100% {
    transform: scale(0.9);
    opacity: 0.5;
  }
  50% {
    transform: scale(1);
    opacity: 0.68;
  }
}

/* 与配置「呼吸动画」对应的空闲态预览（未开始练习时） */
.stage[data-breath-anim="gentle"]:not(.breathing-active) .orb-core {
  animation: orb-breathe-gentle 8s var(--ease-in-out-soft) infinite;
}

.stage[data-breath-anim="gentle"]:not(.breathing-active) .orb-glow {
  animation: orb-glow-gentle 8s var(--ease-in-out-soft) infinite;
}

.stage[data-breath-anim="deep"]:not(.breathing-active) .orb-core {
  animation: orb-breathe-deep 9s var(--ease-in-out-soft) infinite;
}

.stage[data-breath-anim="deep"]:not(.breathing-active) .orb-glow {
  animation: orb-glow-deep 9s var(--ease-in-out-soft) infinite;
}

.stage[data-breath-anim="tide"]:not(.breathing-active) .orb-core {
  animation: orb-breathe-tide 7s var(--ease-in-out-soft) infinite;
}

.stage[data-breath-anim="tide"]:not(.breathing-active) .orb-glow {
  animation: orb-glow-tide 7s var(--ease-in-out-soft) infinite;
}

.stage[data-breath-anim="ripple"]:not(.breathing-active) .orb-core {
  animation: orb-breathe-ripple 6s var(--ease-in-out-soft) infinite;
}

.stage[data-breath-anim="ripple"]:not(.breathing-active) .orb-glow {
  animation: orb-glow-ripple 6s var(--ease-in-out-soft) infinite;
}

.stage[data-breath-anim="numeric"]:not(.breathing-active) .orb-core {
  animation: orb-breathe-numeric 12s var(--ease-in-out-soft) infinite;
}

.stage[data-breath-anim="numeric"]:not(.breathing-active) .orb-glow {
  animation: orb-glow-numeric 12s var(--ease-in-out-soft) infinite;
}

@keyframes orb-breathe-gentle {
  0%, 100% {
    transform: scale(0.91);
  }
  50% {
    transform: scale(0.972);
  }
}

@keyframes orb-glow-gentle {
  0%, 100% {
    transform: scale(0.93);
    opacity: 0.48;
  }
  50% {
    transform: scale(0.99);
    opacity: 0.62;
  }
}

@keyframes orb-breathe-deep {
  0%, 100% {
    transform: scale(0.84);
  }
  50% {
    transform: scale(0.96);
  }
}

@keyframes orb-glow-deep {
  0%, 100% {
    transform: scale(0.88);
    opacity: 0.52;
  }
  50% {
    transform: scale(1.04);
    opacity: 0.72;
  }
}

@keyframes orb-breathe-tide {
  0%, 100% {
    transform: scale(0.87);
  }
  45% {
    transform: scale(0.948);
  }
  100% {
    transform: scale(0.87);
  }
}

@keyframes orb-glow-tide {
  0%, 100% {
    transform: scale(0.9);
    opacity: 0.5;
  }
  40% {
    transform: scale(1.02);
    opacity: 0.7;
  }
  100% {
    transform: scale(0.9);
    opacity: 0.5;
  }
}

@keyframes orb-breathe-ripple {
  0%, 100% {
    transform: scale(0.88);
  }
  50% {
    transform: scale(0.94);
  }
}

@keyframes orb-glow-ripple {
  0%, 100% {
    transform: scale(0.85);
    opacity: 0.42;
  }
  50% {
    transform: scale(1.08);
    opacity: 0.78;
  }
}

@keyframes orb-breathe-numeric {
  0%, 100% {
    transform: scale(0.884);
  }
  50% {
    transform: scale(0.892);
  }
}

@keyframes orb-glow-numeric {
  0%, 100% {
    transform: scale(0.905);
    opacity: 0.5;
  }
  50% {
    transform: scale(0.912);
    opacity: 0.54;
  }
}

.stage-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: clamp(20px, 4vw, 36px) 20px 28px;
}

.orb-wrap {
  position: relative;
  width: min(74vw, 288px);
  height: min(74vw, 288px);
  margin-bottom: 26px;
}

.orb-wrap.is-countdown .orb-core {
  pointer-events: none;
}

.countdown-layer {
  position: absolute;
  inset: 0;
  z-index: 12;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(255, 255, 255, 0.92);
  border: 2px solid var(--countdown-border);
  box-shadow: 0 16px 48px var(--countdown-shadow);
  pointer-events: none;
}

/* 避免 display:flex 覆盖 hidden，结束后必须完全不占位、不挡字 */
.countdown-layer[hidden] {
  display: none !important;
  visibility: hidden !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

.countdown-digit {
  font-family: var(--font-mono);
  font-size: clamp(3.6rem, 20vw, 5.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.countdown-digit.countdown-bump {
  animation: countdown-pop 0.48s var(--ease-out-expo);
}

@keyframes countdown-pop {
  from {
    transform: scale(0.75);
    opacity: 0.45;
  }

  to {
    transform: scale(1);
    opacity: 1;
  }
}

.countdown-hint {
  margin-top: 14px;
  font-size: 0.74rem;
  color: var(--text-muted);
  font-weight: 600;
  max-width: 13em;
  line-height: 1.45;
  text-align: center;
}

.orb-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--orb-ring-border);
  opacity: 0.85;
  transform: scale(1);
  transition: transform 0.1s linear;
}

.orb-glow {
  position: absolute;
  inset: -10%;
  border-radius: 50%;
  background: radial-gradient(circle, var(--glow-1) 0%, transparent 68%);
  opacity: 0.65;
  filter: blur(28px);
  transform: scale(0.9);
  transition: transform 0.12s linear, opacity 0.35s var(--ease-in-out-soft);
  pointer-events: none;
}

button.orb-core {
  position: absolute;
  inset: 11%;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 18px;
  margin: 0;
  font: inherit;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  appearance: none;
  background: var(--orb-core-bg);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow:
    inset 0 2px 12px rgba(255, 255, 255, 0.8),
    var(--orb-core-shadow);
  transform: scale(0.88);
  transition: transform 0.12s linear, box-shadow 0.45s var(--ease-in-out-soft);
}

.orb-core:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.orb-core:disabled {
  cursor: default;
  opacity: 1;
}

button.orb-core[data-phase="inhale"] {
  box-shadow:
    inset 0 2px 12px rgba(255, 255, 255, 0.9),
    0 0 48px var(--glow-1);
}

button.orb-core[data-phase="exhale"] {
  box-shadow:
    inset 0 2px 8px rgba(255, 255, 255, 0.6),
    0 0 36px var(--glow-2);
}

.orb-label {
  font-size: clamp(1.05rem, 4vw, 1.38rem);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--text);
}

.orb-hint {
  margin-top: 12px;
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--text-muted);
  max-width: 15.5em;
  white-space: pre-line;
}

.timer-block {
  width: 100%;
  max-width: 300px;
  margin-bottom: 26px;
}

.timer-digits {
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 7vw, 2.85rem);
  font-weight: 350;
  letter-spacing: 0.06em;
  text-align: center;
  font-variant-numeric: tabular-nums;
  margin-bottom: 14px;
  color: var(--leaf);
}

.progress-slot {
  width: 100%;
  margin-bottom: 2px;
}

.progress-track--linear {
  height: 8px;
  border-radius: 999px;
  background: var(--progress-track-bg);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: var(--progress);
  box-shadow: 0 0 16px var(--progress-fill-glow);
  transition: width 0.05s linear;
}

.progress-box {
  width: min(204px, 58vw);
  max-width: 100%;
  margin: 0 auto;
  padding: 2px 0 4px;
}

.progress-box-svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.progress-box-track {
  fill: none;
  stroke: var(--progress-track-bg);
  stroke-width: 3.25;
  stroke-linejoin: miter;
}

.progress-box-fill {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3.25;
  stroke-linecap: butt;
  stroke-linejoin: miter;
}

.cycle-line {
  margin-top: 14px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.cycle-line .dot {
  margin: 0 8px;
  opacity: 0.35;
}

.controls {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  min-width: 120px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease-out-expo), box-shadow 0.25s, opacity 0.2s;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn:not(:disabled):active {
  transform: scale(0.98);
}

.btn.primary {
  color: #fff;
  background: linear-gradient(145deg, var(--accent-soft), var(--accent));
  box-shadow: var(--shadow-float);
}

.btn.primary:not(:disabled):hover {
  box-shadow: 0 14px 36px var(--primary-hover-shadow);
}

.btn.ghost {
  color: var(--text);
  background: rgba(255, 255, 255, 0.65);
  border-color: var(--border-soft);
}

.btn.ghost:hover {
  background: #fff;
}

.detail-effect-block {
  margin: 0 0 20px;
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  background: var(--detail-effect-bg);
  border: 1px solid var(--detail-effect-border);
}

.detail-effect-label {
  margin: 0 0 8px;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  color: var(--accent);
}

.detail-effect-text {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--text);
}

.detail-lead {
  margin: 0 0 18px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.detail-section {
  margin-bottom: 18px;
}

.detail-section h3 {
  margin: 0 0 8px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--accent);
}

.detail-section p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--text);
}

.detail-section.subtle p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* 鼓励语：小条消息，不占满屏 */
.toast-encourage {
  position: fixed;
  z-index: 80;
  top: max(88px, calc(env(safe-area-inset-top, 0px) + 72px));
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  width: min(calc(100vw - 32px), 320px);
  padding: 10px 14px 12px;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--border-soft);
  box-shadow: 0 8px 28px var(--shadow-ui-strong), 0 2px 8px var(--shadow-ui);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease-out-expo), transform 0.35s var(--ease-out-expo);
}

.toast-encourage:not([hidden]) {
  pointer-events: auto;
}

.toast-encourage.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast-encourage-badge {
  display: inline-block;
  align-self: flex-start;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: #fff;
  background: linear-gradient(145deg, var(--accent-soft), var(--accent));
}

.toast-encourage-text {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.5;
  font-weight: 600;
  color: var(--text);
}

.foot {
  position: relative;
  z-index: 2;
  max-width: 560px;
  margin: 40px auto 8px;
  padding-bottom: max(12px, env(safe-area-inset-bottom));
  text-align: center;
}

.foot-disclaimer {
  margin: 0;
  font-size: 0.72rem;
  line-height: 1.65;
  color: var(--text-muted);
  opacity: 0.92;
}

.foot-divider {
  width: 40px;
  height: 1px;
  margin: 22px auto 20px;
  background: linear-gradient(
    90deg,
    transparent,
    color-mix(in srgb, var(--accent) 35%, transparent),
    transparent
  );
  border: none;
}

@supports not (background: color-mix(in srgb, red, blue)) {
  .foot-divider {
    background: linear-gradient(90deg, transparent, var(--border-soft), transparent);
  }
}

.foot-credit {
  margin: 0;
}

.foot-credit-line {
  margin: 0 0 10px;
  font-size: 0.7rem;
  line-height: 1.4;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

a.foot-credit-brand {
  font-weight: 800;
  letter-spacing: 0.18em;
  font-size: 0.68rem;
  text-decoration: none;
  color: var(--text);
  background: linear-gradient(120deg, var(--text) 0%, var(--accent) 160%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  transition: opacity 0.2s ease, filter 0.2s ease;
}

a.foot-credit-brand:hover {
  opacity: 0.88;
  filter: brightness(1.05);
}

@supports not (background-clip: text) {
  a.foot-credit-brand {
    color: var(--accent);
    background: none;
  }

  a.foot-credit-brand:hover {
    color: var(--accent-soft);
    opacity: 1;
    filter: none;
  }
}

.foot-credit-suffix {
  margin-left: 0.35em;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--text-muted);
}

a.foot-credit-brand:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* iOS：纯色扁平 + 轻描边/阴影；去掉大面积 blur/渐变装饰（Safari 易糊、毛边、色带） */
@supports (-webkit-touch-callout: none) {
  html {
    -webkit-text-size-adjust: 100%;
  }

  .bg-layer {
    background: var(--bg-page);
  }

  .bg-blobs {
    display: none;
  }

  .brand-mark::after {
    display: none;
  }

  .orb-glow {
    display: none !important;
  }

  .panel,
  .stage-card {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background: var(--surface);
  }

  .orb-wrap {
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
  }

  button.orb-core {
    background: var(--accent-soft);
    background-image: none;
    border-color: rgba(255, 255, 255, 0.24);
    box-shadow:
      0 10px 32px var(--shadow-ui),
      inset 0 1px 0 rgba(255, 255, 255, 0.24);
  }

  button.orb-core[data-phase="inhale"],
  button.orb-core[data-phase="exhale"] {
    background: var(--accent-soft);
    background-image: none;
  }

  button.orb-core[data-phase="inhale"] {
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.3),
      0 0 40px var(--glow-1);
  }

  button.orb-core[data-phase="exhale"] {
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.18),
      0 0 32px var(--glow-2);
  }

  .brand-mark {
    background: var(--accent);
    background-image: none;
    box-shadow: 0 4px 18px var(--shadow-ui), inset 0 1px 0 rgba(255, 255, 255, 0.22);
  }

  .btn.primary {
    background: var(--accent);
    background-image: none;
    box-shadow: 0 6px 22px var(--primary-hover-shadow);
  }

  .btn.primary:not(:disabled):hover {
    filter: brightness(1.05);
    box-shadow: 0 8px 26px var(--primary-hover-shadow);
  }

  .toast-encourage-badge {
    background: var(--accent);
    background-image: none;
  }

  .progress-fill {
    background: var(--accent);
    background-image: none;
    box-shadow: none;
  }

  .method-item.is-selected {
    background: rgba(255, 255, 255, 0.97);
    box-shadow: inset 0 0 0 1.5px var(--method-selected-border);
  }

  .detail-effect-block {
    background: rgba(255, 255, 255, 0.97);
    border-color: var(--detail-effect-border);
  }

  .foot-divider {
    width: 32px;
    height: 2px;
    margin: 22px auto 20px;
    border-radius: 1px;
    background: var(--border-soft);
    background-image: none;
  }

  a.foot-credit-brand {
    background: none;
    -webkit-background-clip: unset;
    background-clip: unset;
    color: var(--accent);
  }

  a.foot-credit-brand:hover {
    color: var(--accent-soft);
    filter: none;
    opacity: 0.92;
  }
}

@media (prefers-reduced-motion: reduce) {
  .blob {
    animation: none !important;
  }

  .toast-encourage {
    transition-duration: 0.01ms !important;
  }

  .toast-encourage.is-visible {
    transform: translateX(-50%);
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .stage:not(.breathing-active) .orb-core,
  .stage:not(.breathing-active) .orb-glow {
    animation: none !important;
  }
}