:root {
  color-scheme: light;
  --ink: #171923;
  --muted: #596171;
  --paper: #fbfaf7;
  --surface: #ffffff;
  --line: #d9dee7;
  --flat: #4b6fce;
  --flat-soft: #dce6ff;
  --tuned: #17986f;
  --tuned-soft: #d8f5e8;
  --sharp: #d95a45;
  --sharp-soft: #ffe1d9;
  --gold: #f2b544;
  --violet: #7b61ff;
  --shadow: 0 24px 70px rgba(19, 24, 37, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(123, 97, 255, 0.12), transparent 28%),
    linear-gradient(225deg, rgba(23, 152, 111, 0.12), transparent 30%),
    var(--paper);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

button,
select,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 44px;
}

.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: end;
  min-height: 180px;
  padding: 18px 0 22px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--violet);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 10px;
  max-width: 740px;
  font-size: clamp(3rem, 9vw, 6.8rem);
  line-height: 0.9;
  font-weight: 900;
}

.tagline {
  max-width: 650px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2.2vw, 1.28rem);
  line-height: 1.55;
  font-weight: 600;
}

.hero-badge {
  display: grid;
  grid-template-columns: repeat(3, minmax(46px, 1fr));
  gap: 8px;
  min-width: 178px;
}

.hero-badge span {
  display: grid;
  place-items: center;
  min-height: 42px;
  border: 1px solid rgba(23, 25, 35, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.68);
  color: var(--ink);
  font-weight: 900;
  box-shadow: 0 8px 20px rgba(19, 24, 37, 0.07);
}

.tuner-app {
  display: grid;
  gap: 20px;
  padding: clamp(16px, 3vw, 28px);
  border: 1px solid rgba(23, 25, 35, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.trust-strip span {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid rgba(23, 25, 35, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
}

.status-panel {
  display: grid;
  grid-template-columns: minmax(180px, 280px) 1fr;
  gap: clamp(16px, 4vw, 38px);
  align-items: center;
  min-height: 292px;
  padding: clamp(18px, 3.4vw, 34px);
  border: 1px solid var(--line);
  border-radius: 12px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.74)),
    var(--surface);
  overflow: hidden;
  transition: border-color 200ms ease, background 200ms ease;
}

.status-panel[data-status="flat"] {
  border-color: rgba(75, 111, 206, 0.45);
  background: linear-gradient(135deg, #ffffff, var(--flat-soft));
}

.status-panel[data-status="tuned"] {
  border-color: rgba(23, 152, 111, 0.45);
  background: linear-gradient(135deg, #ffffff, var(--tuned-soft));
}

.status-panel[data-status="sharp"] {
  border-color: rgba(217, 90, 69, 0.45);
  background: linear-gradient(135deg, #ffffff, var(--sharp-soft));
}

.mascot-wrap {
  position: relative;
  width: min(100%, 280px);
  aspect-ratio: 1;
  justify-self: center;
}

.mascot {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.hood {
  fill: #2e3c55;
}

.hair,
.bang {
  fill: url("#hairInk");
}

.face {
  fill: url("#faceGlow");
  stroke: #171923;
  stroke-width: 5;
}

.blush {
  fill: rgba(237, 103, 122, 0.36);
}

.eyes,
.mouth,
.reaction-lines {
  fill: none;
  stroke: #171923;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.eyes {
  stroke-width: 7;
}

.mouth {
  stroke-width: 6;
}

.happy-mouth {
  fill: #982a3b;
}

.panic-mouth {
  fill: #171923;
  stroke-width: 4;
}

.pupil {
  fill: #ffffff;
  stroke: none;
}

.sparkles {
  fill: var(--gold);
  opacity: 0;
}

.reaction-lines {
  stroke-width: 7;
  opacity: 0;
}

.tear-drops,
.sweat-drops {
  fill: #58a9ff;
  opacity: 0;
}

.arm {
  fill: none;
  stroke: #171923;
  stroke-width: 12;
  stroke-linecap: round;
}

.thumb {
  fill: #f5b074;
  stroke: #171923;
  stroke-width: 5;
}

.idle-eyes,
.idle-mouth,
.happy-eyes,
.happy-mouth,
.sad-eyes,
.sad-mouth,
.panic-eyes,
.panic-mouth,
.tear-drops,
.sweat-drops,
.thumb-arm {
  display: none;
}

.mascot-idle .idle-eyes,
.mascot-idle .idle-mouth,
.mascot-happy .happy-eyes,
.mascot-happy .happy-mouth,
.mascot-happy .thumb-arm,
.mascot-sad .sad-eyes,
.mascot-sad .sad-mouth,
.mascot-sad .tear-drops,
.mascot-panic .panic-eyes,
.mascot-panic .panic-mouth,
.mascot-panic .sweat-drops {
  display: block;
}

.mascot-idle .mascot-body {
  animation: float 2.8s ease-in-out infinite;
}

.mascot-sad .mascot-body {
  animation: droop 1.6s ease-in-out infinite;
}

.mascot-sad .tear-drops {
  animation: tears 1.1s ease-in infinite;
}

.mascot-happy .mascot-body {
  animation: bounce 1.2s ease-in-out infinite;
}

.mascot-happy .sparkles {
  opacity: 1;
  animation: twinkle 1.4s ease-in-out infinite;
}

.mascot-happy .thumb-arm {
  transform-origin: 198px 174px;
  animation: thumbs 1s ease-in-out infinite;
}

.mascot-panic .mascot-body {
  animation: panicShake 0.16s linear infinite;
}

.mascot-panic .reaction-lines,
.mascot-panic .sweat-drops {
  opacity: 1;
}

.mascot-panic .sweat-drops {
  animation: sweat 0.72s ease-in infinite;
}

.status-copy {
  min-width: 0;
}

.status-kicker {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(2.35rem, 6vw, 5rem);
  line-height: 0.95;
  font-weight: 900;
}

#status-message {
  max-width: 600px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2.2vw, 1.35rem);
  line-height: 1.45;
  font-weight: 700;
}

.readout-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.readout {
  min-height: 108px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}

.label {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.readout strong {
  display: block;
  color: var(--ink);
  font-size: clamp(1.4rem, 4vw, 2.35rem);
  line-height: 1;
  font-weight: 900;
  overflow-wrap: anywhere;
}

.target-readout strong {
  font-size: clamp(1.2rem, 3.1vw, 2rem);
}

.meter {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.meter-labels,
.meter-scale {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 900;
}

.meter-labels span:nth-child(2),
.meter-scale span:nth-child(3) {
  text-align: center;
}

.meter-labels span:nth-child(3),
.meter-scale span:nth-child(4),
.meter-scale span:nth-child(5) {
  text-align: right;
}

.meter-track {
  position: relative;
  height: 76px;
  margin: 10px 0;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #edf0f5;
  overflow: hidden;
}

.meter-zone {
  position: absolute;
  inset-block: 0;
}

.meter-zone-flat {
  left: 0;
  width: 46%;
  background: linear-gradient(90deg, rgba(75, 111, 206, 0.7), rgba(75, 111, 206, 0.18));
}

.meter-zone-perfect {
  left: 46%;
  width: 8%;
  background: rgba(23, 152, 111, 0.7);
}

.meter-zone-sharp {
  right: 0;
  width: 46%;
  background: linear-gradient(90deg, rgba(217, 90, 69, 0.18), rgba(217, 90, 69, 0.72));
}

.meter-center {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  background: var(--ink);
  transform: translateX(-50%);
}

.meter-needle {
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 50%;
  width: 14px;
  border-radius: 999px;
  background: var(--ink);
  box-shadow: 0 4px 18px rgba(23, 25, 35, 0.28);
  transform: translateX(-50%);
  transition: left 140ms ease-out;
}

.meter-scale {
  grid-template-columns: repeat(5, 1fr);
  font-size: 0.76rem;
}

.meter-scale span:nth-child(1),
.meter-scale span:nth-child(2) {
  text-align: left;
}

.controls {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 12px;
  align-items: stretch;
}

.primary-button,
.secondary-button,
.tone-button,
.select-control {
  min-height: 54px;
  border-radius: 10px;
}

.primary-button,
.secondary-button,
.tone-button {
  border: 0;
  font-weight: 900;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.primary-button {
  grid-column: span 2;
  padding: 0 24px;
  background: var(--ink);
  color: #ffffff;
  box-shadow: 0 14px 34px rgba(23, 25, 35, 0.22);
}

.secondary-button {
  grid-column: span 2;
  padding: 0 20px;
  background: #eef1f6;
  color: var(--ink);
}

.tuning-control {
  grid-column: span 3;
}

.calibration-control {
  grid-column: span 2;
}

.string-control {
  grid-column: span 3;
}

.primary-button:hover,
.secondary-button:hover,
.tone-button:hover {
  transform: translateY(-1px);
}

.primary-button:disabled {
  cursor: wait;
  opacity: 0.72;
  transform: none;
}

.select-control {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: center;
  padding: 0 14px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.select-control span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

select {
  width: 100%;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-weight: 800;
  outline: none;
}

input {
  width: 100%;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-weight: 900;
  outline: none;
}

select:disabled,
input:disabled {
  color: var(--muted);
  cursor: not-allowed;
}

.number-control {
  grid-template-columns: auto minmax(64px, 1fr);
}

.guided-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 18px;
  border: 1px solid rgba(23, 152, 111, 0.28);
  border-radius: 12px;
  background: linear-gradient(135deg, #ffffff, rgba(216, 245, 232, 0.72));
}

.guided-panel[hidden] {
  display: none;
}

.guided-panel strong {
  display: block;
  margin-bottom: 6px;
  font-size: clamp(1.25rem, 3vw, 2rem);
  line-height: 1.05;
  font-weight: 900;
}

.guided-panel p {
  margin-bottom: 0;
  color: var(--muted);
  font-weight: 700;
}

.guided-dots {
  display: grid;
  grid-template-columns: repeat(6, minmax(44px, 1fr));
  gap: 8px;
}

.guided-dot {
  display: grid;
  place-items: center;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 900;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.guided-dot.is-current {
  background: var(--ink);
  color: #ffffff;
  transform: translateY(-2px);
}

.guided-dot.is-complete {
  border-color: rgba(23, 152, 111, 0.45);
  background: var(--tuned-soft);
  color: var(--tuned);
}

.reference-tones {
  display: grid;
  gap: 12px;
}

.help-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

details {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}

summary {
  min-height: 52px;
  padding: 16px;
  color: var(--ink);
  font-weight: 900;
  cursor: pointer;
}

details p {
  margin: 0;
  padding: 0 16px 16px;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.45;
  font-weight: 700;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
}

h3 {
  margin-bottom: 0;
  font-size: 1rem;
  font-weight: 900;
}

.section-heading p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.tone-buttons {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
}

.tone-button {
  display: grid;
  gap: 2px;
  place-items: center;
  padding: 10px;
  background: #eef1f6;
  color: var(--ink);
}

.tone-button span {
  font-size: 1rem;
}

.tone-button small {
  color: var(--muted);
  font-weight: 800;
}

button:focus-visible,
select:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 4px solid rgba(123, 97, 255, 0.35);
  outline-offset: 3px;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

@keyframes droop {
  0%, 100% { transform: translateY(5px) rotate(-1deg); }
  50% { transform: translateY(12px) rotate(1deg); }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0) scale(1); }
  45% { transform: translateY(-13px) scale(1.03); }
  70% { transform: translateY(2px) scale(0.99); }
}

@keyframes panicShake {
  0% { transform: translate(-3px, 1px) rotate(-1deg); }
  50% { transform: translate(3px, -1px) rotate(1deg); }
  100% { transform: translate(-2px, 2px) rotate(-1deg); }
}

@keyframes tears {
  0% { transform: translateY(-4px); opacity: 0; }
  30%, 70% { opacity: 1; }
  100% { transform: translateY(20px); opacity: 0; }
}

@keyframes sweat {
  0% { transform: translateY(-2px); opacity: 0; }
  25%, 75% { opacity: 1; }
  100% { transform: translateY(12px); opacity: 0; }
}

@keyframes twinkle {
  0%, 100% { transform: scale(0.85); opacity: 0.55; }
  50% { transform: scale(1.08); opacity: 1; }
}

@keyframes thumbs {
  0%, 100% { transform: rotate(-5deg); }
  50% { transform: rotate(8deg); }
}

@media (max-width: 820px) {
  .shell {
    width: min(100% - 20px, 680px);
    padding-top: 16px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-badge {
    grid-template-columns: repeat(6, 1fr);
    min-width: 0;
  }

  .status-panel {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .mascot-wrap {
    width: min(78vw, 260px);
  }

  .readout-grid,
  .controls,
  .guided-panel,
  .help-grid {
    grid-template-columns: 1fr;
  }

  .readout {
    min-height: 92px;
  }

  .tone-buttons {
    grid-template-columns: repeat(3, 1fr);
  }

  .section-heading {
    display: grid;
  }

  .guided-dots {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 460px) {
  .shell {
    width: calc(100% - 14px);
  }

  .tuner-app {
    padding: 10px;
    border-radius: 12px;
  }

  .status-panel {
    padding: 14px;
  }

  .hero-badge {
    grid-template-columns: repeat(3, 1fr);
  }

  .meter {
    padding: 12px;
  }

  .meter-track {
    height: 64px;
  }

  .tone-buttons {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}