:root {
  --bg: #05070d;
  --ink: #e9edf8;
  --muted: #7b849c;
  --accent: #6f7cf0;
  --accent-deep: #3b47cc;
  --accent-alt: #38bdf8;
  --glass: rgba(255, 255, 255, 0.045);
  --stroke: rgba(255, 255, 255, 0.1);
  --ok: #34d399;
  --err: #f87171;
  --btn: clamp(11.5rem, 44vw, 16rem);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #eef1f8;
    --ink: #141a29;
    --muted: #6b7488;
    --glass: rgba(255, 255, 255, 0.7);
    --stroke: rgba(20, 26, 41, 0.09);
    --err: #dc2626;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  display: grid;
  place-items: center;
  background: var(--bg);
  color: var(--ink);
  font-family: ui-sans-serif, -apple-system, "PingFang SC", "Noto Sans SC", "Segoe UI", system-ui,
    sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
  overscroll-behavior: none;
}

/* ---------- ambient ---------- */
.ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.veil {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.42;
  will-change: transform;
  animation: sway 26s ease-in-out infinite;
}

.veil-a {
  top: -26vmax;
  left: -18vmax;
  width: 62vmax;
  height: 62vmax;
  background: radial-gradient(circle, var(--accent), transparent 66%);
}

.veil-b {
  right: -22vmax;
  bottom: -26vmax;
  width: 58vmax;
  height: 58vmax;
  background: radial-gradient(circle, var(--accent-alt), transparent 66%);
  animation-delay: -10s;
}

.veil-c {
  top: 30%;
  left: 40%;
  width: 34vmax;
  height: 34vmax;
  background: radial-gradient(circle, #a78bfa, transparent 70%);
  opacity: 0.24;
  animation-delay: -18s;
}

@keyframes sway {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(4vmax, -3vmax, 0) scale(1.14);
  }
}

/* 极细噪点，压住渐变的塑料感 */
.grain {
  position: absolute;
  inset: -100%;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: shift 6s steps(4) infinite;
  pointer-events: none;
}

@keyframes shift {
  0% {
    transform: translate(0, 0);
  }
  25% {
    transform: translate(-2%, 1%);
  }
  50% {
    transform: translate(1%, -2%);
  }
  75% {
    transform: translate(-1%, -1%);
  }
}

.fx {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.stage {
  position: relative;
  z-index: 3;
  display: grid;
  place-items: center;
}

/* ---------- button ---------- */
.call {
  position: relative;
  width: var(--btn);
  height: var(--btn);
  border: 0;
  padding: 0;
  border-radius: 50%;
  background: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  transform: translateZ(0);
}

/* 外层柔光 */
.halo {
  position: absolute;
  inset: -22%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(111, 124, 240, 0.34), transparent 62%);
  filter: blur(14px);
  animation: glow 4.4s ease-in-out infinite;
}

@keyframes glow {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.62;
  }
  50% {
    transform: scale(1.12);
    opacity: 0.95;
  }
}

/* 旋转的高光边环 */
.rim {
  position: absolute;
  inset: -0.55rem;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    transparent 0deg,
    rgba(255, 255, 255, 0.68) 26deg,
    transparent 62deg,
    transparent 180deg,
    rgba(56, 189, 248, 0.5) 214deg,
    transparent 258deg
  );
  animation: spin 5.5s linear infinite;
  mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 2px));
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 2px), #000 calc(100% - 2px));
}

@keyframes spin {
  to {
    transform: rotate(1turn);
  }
}

.face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 26%, #8b96ff, var(--accent) 34%, var(--accent-deep) 72%, #232c9e);
  box-shadow: 0 1.6rem 3.8rem rgba(59, 71, 204, 0.45), inset 0 2px 1px rgba(255, 255, 255, 0.42),
    inset 0 -1.4rem 2.4rem rgba(0, 0, 0, 0.3);
  overflow: hidden;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease,
    background 0.45s ease;
}

/* 表面缓慢流动的高光，像抛光金属 */
.core {
  position: absolute;
  inset: 0;
  background: conic-gradient(
    from 210deg,
    transparent,
    rgba(255, 255, 255, 0.16) 40deg,
    transparent 110deg,
    transparent 250deg,
    rgba(255, 255, 255, 0.1) 300deg,
    transparent
  );
  animation: spin 11s linear infinite reverse;
}

.call:hover .face {
  transform: scale(1.04);
  box-shadow: 0 2rem 4.6rem rgba(59, 71, 204, 0.56), inset 0 2px 1px rgba(255, 255, 255, 0.42),
    inset 0 -1.4rem 2.4rem rgba(0, 0, 0, 0.3);
}

.call:active .face {
  transform: scale(0.94);
}

.call:focus-visible {
  outline: 2px solid var(--accent-alt);
  outline-offset: 0.85rem;
}

.call:disabled {
  cursor: default;
}

/* ---------- glyphs ---------- */
.glyph {
  position: absolute;
  width: 38%;
  height: 38%;
  fill: none;
  stroke: #fff;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: opacity 0.28s ease, transform 0.34s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.glyph-idle circle:first-child {
  fill: #fff;
  stroke: none;
}

.glyph-idle .pulse-1,
.glyph-idle .pulse-2 {
  transform-origin: center;
  animation: emit 2.6s ease-out infinite;
}

.glyph-idle .pulse-2 {
  animation-delay: 0.8s;
}

@keyframes emit {
  0% {
    transform: scale(0.4);
    opacity: 0.85;
  }
  100% {
    transform: scale(1.05);
    opacity: 0;
  }
}

.glyph-done,
.glyph-fail {
  opacity: 0;
  transform: scale(0.5);
  stroke-width: 2.1;
}

.glyph-done path,
.glyph-fail path {
  stroke-dasharray: 30;
  stroke-dashoffset: 30;
}

/* ---------- cooldown gauge（冷却进度环） ---------- */
.gauge {
  position: absolute;
  inset: -0.55rem;
  transform: rotate(-90deg);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.call[data-cooling="1"] .gauge {
  opacity: 1;
}

.gauge-track {
  fill: none;
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 1.6;
}

.gauge-arc {
  fill: none;
  stroke: var(--accent-alt);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-dasharray: 301.6; /* 2πr, r=48 */
  stroke-dashoffset: 301.6;
  filter: drop-shadow(0 0 4px rgba(56, 189, 248, 0.8));
}

/* ---------- tap ripple（每次按下的即时水波） ---------- */
.tap {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.5), transparent 62%);
  opacity: 0;
  transform: scale(0.2);
  pointer-events: none;
}

.call[data-tap="1"] .tap {
  animation: tap-out 0.5s ease-out;
}

@keyframes tap-out {
  0% {
    opacity: 0.75;
    transform: scale(0.2);
  }
  100% {
    opacity: 0;
    transform: scale(1.05);
  }
}

/* 按下瞬间的物理回弹，任何时候都有 */
.call[data-tap="1"] .face {
  animation: squish 0.34s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes squish {
  0% {
    transform: scale(0.9);
  }
  55% {
    transform: scale(1.045);
  }
  100% {
    transform: scale(1);
  }
}

/* 冷却中：排队计数徽章 */
.queued {
  position: absolute;
  top: 6%;
  right: 6%;
  min-width: 1.35rem;
  height: 1.35rem;
  padding: 0 0.3rem;
  border-radius: 0.7rem;
  background: rgba(255, 255, 255, 0.92);
  color: var(--accent-deep);
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.35rem;
  text-align: center;
  font-variant-numeric: tabular-nums;
  opacity: 0;
  transform: scale(0.4);
  transition: opacity 0.2s ease, transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1);
  pointer-events: none;
  z-index: 2;
}

.call[data-queued="1"] .queued {
  opacity: 1;
  transform: scale(1);
}

/* --- state: sending（不再锁死交互，只做轻微收缩） --- */
.call[data-state="sending"] .face {
  transform: scale(0.985);
}

/* --- state: sent --- */
.call[data-state="sent"] .face {
  background: radial-gradient(circle at 32% 26%, #6ee7b7, var(--ok) 36%, #059669 74%, #046c52);
  box-shadow: 0 1.6rem 3.8rem rgba(5, 150, 105, 0.45), inset 0 2px 1px rgba(255, 255, 255, 0.42),
    inset 0 -1.4rem 2.4rem rgba(0, 0, 0, 0.28);
}

.call[data-state="sent"] .glyph-idle {
  opacity: 0;
  transform: scale(1.6);
}

.call[data-state="sent"] .glyph-done {
  opacity: 1;
  transform: scale(1);
}

.call[data-state="sent"] .glyph-done path {
  animation: draw 0.5s cubic-bezier(0.65, 0, 0.35, 1) forwards;
}

@keyframes draw {
  to {
    stroke-dashoffset: 0;
  }
}


/* --- state: failed --- */
.call[data-state="failed"] .face {
  background: radial-gradient(circle at 32% 26%, #fca5a5, #ef4444 38%, #b91c1c 76%);
  box-shadow: 0 1.6rem 3.8rem rgba(185, 28, 28, 0.42), inset 0 2px 1px rgba(255, 255, 255, 0.36),
    inset 0 -1.4rem 2.4rem rgba(0, 0, 0, 0.28);
  animation: shake 0.42s ease;
}

.call[data-state="failed"] .glyph-idle {
  opacity: 0;
}

.call[data-state="failed"] .glyph-fail {
  opacity: 1;
  transform: scale(1);
}

.call[data-state="failed"] .glyph-fail path {
  animation: draw 0.34s ease forwards;
}

@keyframes shake {
  20% {
    transform: translateX(-0.4rem);
  }
  45% {
    transform: translateX(0.34rem);
  }
  70% {
    transform: translateX(-0.2rem);
  }
  100% {
    transform: translateX(0);
  }
}

/* ---------- status (克制，浮在底部) ---------- */
.status {
  position: fixed;
  left: 50%;
  bottom: max(1.6rem, env(safe-area-inset-bottom));
  z-index: 4;
  margin: 0;
  transform: translate(-50%, 0.4rem);
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.status[data-show="1"] {
  opacity: 1;
  transform: translate(-50%, 0);
}

.status[data-tone="ok"] {
  color: var(--ok);
}

.status[data-tone="err"] {
  color: var(--err);
}

/* ---------- composer（默认隐藏，长按或按 E 唤出） ---------- */
.composer {
  position: fixed;
  left: 50%;
  bottom: max(3.6rem, calc(env(safe-area-inset-bottom) + 3.2rem));
  z-index: 5;
  width: min(24rem, calc(100vw - 2.5rem));
  padding: 0.9rem;
  border: 1px solid var(--stroke);
  border-radius: 1rem;
  background: var(--glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transform: translateX(-50%);
  animation: rise 0.28s cubic-bezier(0.34, 1.4, 0.64, 1);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translate(-50%, 0.6rem);
  }
}

.composer-input {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--stroke);
  border-radius: 0.7rem;
  background: rgba(0, 0, 0, 0.22);
  color: var(--ink);
  font: inherit;
  font-size: 1rem; /* 16px 起，避免 iOS 聚焦缩放 */
  line-height: 1.5;
  resize: none;
}

@media (prefers-color-scheme: light) {
  .composer-input {
    background: rgba(255, 255, 255, 0.86);
  }
}

.composer-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(111, 124, 240, 0.18);
}

.composer-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.5rem;
}

.count {
  color: var(--muted);
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
}

.reset {
  border: 0;
  padding: 0;
  background: none;
  color: var(--accent);
  font-size: 0.76rem;
  font-family: inherit;
  cursor: pointer;
}

.reset:hover {
  text-decoration: underline;
}

@media (prefers-reduced-motion: reduce) {
  .veil,
  .grain,
  .halo,
  .rim,
  .core,
  .glyph-idle .pulse-1,
  .glyph-idle .pulse-2,
  .composer {
    animation: none;
  }

  .call[data-tap="1"] .face,
  .call[data-tap="1"] .tap {
    animation-duration: 0.15s;
  }

  .face,
  .glyph {
    transition-duration: 0.12s;
  }

  .call[data-state="failed"] .face {
    animation: none;
  }
}