:root {
  --bg: #07080c;
  --panel: #0d1118;
  --panel-2: #111722;
  --text: #eef3ff;
  --muted: #7d879c;
  --border: #1e2736;
  --grid: #17202d;
  --accent: #6ef3c5;
  --accent-2: #8f7cff;
  --danger: #ff6b8b;
  --warn: #ffcf6b;
  --stage: rgba(10, 14, 22, 0.66);
  --tooltip: rgba(8, 11, 18, 0.92);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
  --font:
    ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: dark;
  font: 15px/1.55 var(--font);
  color: var(--text);
  background: var(--bg);
}
:root[data-theme="light"] {
  --bg: #f4f6fb;
  --panel: #ffffff;
  --panel-2: #f8faff;
  --text: #11151d;
  --muted: #667085;
  --border: #d8deea;
  --grid: #e6ebf4;
  --accent: #0a9f7a;
  --accent-2: #5b4bd6;
  --danger: #d92d5c;
  --warn: #a86b00;
  --stage: rgba(255, 255, 255, 0.72);
  --tooltip: rgba(255, 255, 255, 0.94);
  --shadow: 0 24px 70px rgba(35, 45, 70, 0.14);
  color-scheme: light;
}
* {
  box-sizing: border-box;
}
[hidden] {
  display: none !important;
}
html,
body {
  min-height: 100%;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(52% 46% at 16% 0%, rgba(110, 243, 197, 0.13), transparent 70%),
    radial-gradient(46% 42% at 84% 8%, rgba(143, 124, 255, 0.14), transparent 70%),
    radial-gradient(40% 30% at 52% 100%, rgba(110, 243, 197, 0.05), transparent 70%);
}
:root[data-theme="light"] .ambient {
  background:
    radial-gradient(52% 46% at 16% 0%, rgba(10, 159, 122, 0.1), transparent 70%),
    radial-gradient(46% 42% at 84% 8%, rgba(91, 75, 214, 0.1), transparent 70%);
}

.topbar {
  position: relative;
  z-index: 2;
  max-width: 1120px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.wordmark {
  color: var(--muted);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.12em;
}
.phira {
  display: inline-flex;
  width: 38px;
  height: 38px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--panel);
  transition:
    border-color 0.2s,
    transform 0.2s;
}
.phira img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.phira:hover {
  border-color: var(--muted);
  transform: translateY(-1px);
}
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ghost {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 14px;
  color: var(--muted);
  background: var(--panel);
  transition:
    color 0.2s,
    border-color 0.2s,
    background 0.2s;
}
.ghost:hover {
  color: var(--text);
  border-color: var(--muted);
}
.ghost:disabled {
  opacity: 0.4;
  cursor: wait;
}
.small {
  font-size: 12px;
}
.primary {
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 9px 18px;
  background: var(--accent);
  color: var(--bg);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow:
    0 0 0 1px rgba(110, 243, 197, 0.16),
    0 8px 28px rgba(110, 243, 197, 0.16);
  transition:
    transform 0.2s,
    filter 0.2s;
}
.primary:hover {
  filter: brightness(1.06);
  transform: translateY(-1px);
}
.primary:disabled {
  opacity: 0.5;
  cursor: wait;
  transform: none;
}
.icon {
  position: relative;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--muted);
  background: var(--panel);
  text-decoration: none;
}
.icon:hover {
  color: var(--text);
  border-color: var(--muted);
}
.icon svg {
  position: absolute;
  width: 18px;
  height: 18px;
  transition:
    opacity 0.25s ease,
    transform 0.35s ease;
}
.icon .sun {
  opacity: 1;
  transform: rotate(0) scale(1);
}
.icon .moon {
  opacity: 0;
  transform: rotate(-65deg) scale(0.4);
}
:root[data-theme="dark"] .icon .sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.4);
}
:root[data-theme="dark"] .icon .moon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

main {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px 40px;
}

.hero {
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 22px;
  min-height: min(600px, calc(100vh - 230px));
  padding: 0 0 32px;
  text-align: center;
  animation: rise 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}
@supports (height: 100svh) {
  .hero {
    min-height: min(600px, calc(100svh - 230px));
  }
}
.hero h1 {
  margin: 0;
  font-size: clamp(54px, 11vw, 118px);
  line-height: 0.84;
  letter-spacing: -0.045em;
  font-kerning: normal;
  font-weight: 760;
}
.typed-wrap {
  display: inline-flex;
  align-items: baseline;
  justify-content: flex-start;
  min-width: 4.4ch;
  text-align: left;
}
.typed {
  white-space: pre;
  padding-right: 0.12em;
  background: linear-gradient(100deg, var(--accent) 8%, var(--accent-2) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.caret {
  display: inline-block;
  width: 0.06em;
  height: 0.72em;
  margin-left: -0.08em;
  border-radius: 2px;
  background: var(--accent);
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink {
  0%,
  49% {
    opacity: 1;
  }
  50%,
  100% {
    opacity: 0;
  }
}

.dropzone {
  position: relative;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 6px;
  width: min(620px, 100%);
  min-height: 186px;
  padding: 28px;
  border: 1px dashed var(--border);
  border-radius: 26px;
  cursor: pointer;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), transparent 70%);
  transition:
    border-color 0.25s,
    box-shadow 0.25s,
    transform 0.25s,
    background 0.25s;
}
.dropzone:hover,
.dropzone.drag {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow:
    0 0 0 1px rgba(110, 243, 197, 0.16),
    0 26px 80px rgba(110, 243, 197, 0.1);
}
.dropzone:focus-within {
  border-color: var(--accent);
}
.dropzone input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}
.drop-icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 4px;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--accent);
  background: var(--panel);
}
.drop-icon svg {
  width: 22px;
  height: 22px;
}
.drop-title {
  font-size: 18px;
  font-weight: 600;
}
.drop-sub {
  font-size: 12px;
  color: var(--muted);
}

.result {
  animation: rise 0.55s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}
.readout {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin: 6px 2px 18px;
}
.readout-main {
  min-width: 0;
}
.label {
  display: block;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.correction {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: clamp(54px, 8.5vw, 96px);
  line-height: 0.9;
  font-weight: 680;
  letter-spacing: -0.065em;
  font-variant-numeric: tabular-nums;
}
.correction .unit {
  font-size: 0.24em;
  font-weight: 500;
  letter-spacing: 0;
  color: var(--muted);
}
.readout-value {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 18px;
  min-width: 0;
}
.final {
  color: var(--muted);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.readout-side {
  text-align: right;
  padding-bottom: 6px;
}
.score {
  font-size: 28px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
}
.score .label {
  margin-top: 2px;
  letter-spacing: 0.14em;
}
.score[data-band="low"] {
  color: var(--danger);
}
.score[data-band="mid"] {
  color: var(--warn);
}
.score[data-band="good"],
.score[data-band="high"] {
  color: var(--accent);
}
.meta {
  margin-top: 9px;
  max-width: 46vw;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--muted);
  font-size: 12px;
}

.stage {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--stage);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.04),
    var(--shadow);
  backdrop-filter: blur(10px);
}
.stage::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(60% 80% at 50% 0%, rgba(110, 243, 197, 0.07), transparent 70%);
}
#curve {
  position: relative;
  display: block;
  width: 100%;
  height: clamp(300px, 40vw, 420px);
  touch-action: none;
  cursor: crosshair;
}
.tooltip {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 3;
  padding: 8px 11px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--tooltip);
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.35);
  font-size: 12px;
  line-height: 1.35;
  white-space: nowrap;
  pointer-events: none;
  backdrop-filter: blur(10px);
}
.tooltip strong {
  display: block;
  font-size: 15px;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}
.tooltip span {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.statusline {
  position: fixed;
  right: 24px;
  bottom: 18px;
  z-index: 4;
  max-width: min(60vw, 520px);
  margin: 0;
  padding: 6px 11px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--tooltip);
  color: var(--muted);
  font-size: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(10px);
}
#status[data-kind="error"] {
  color: var(--danger);
}
#status[data-kind="warn"] {
  color: var(--warn);
}

.loading {
  position: fixed;
  inset: 0;
  z-index: 6;
  display: grid;
  place-items: center;
}
.loading-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--tooltip);
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: 13px;
  backdrop-filter: blur(10px);
}
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.thanks {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: baseline;
  gap: 6px 16px;
  margin-top: 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}
.thanks .label {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: none;
}
.thanks p {
  margin: 0;
  color: var(--text);
}
.thanks a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition:
    color 0.2s,
    border-color 0.2s;
}
.thanks a:hover {
  color: var(--accent);
  border-color: var(--accent);
}
.advanced {
  margin-top: 16px;
  padding-top: 0;
  border-top: 0;
  color: var(--muted);
  font-size: 13px;
}
.advanced summary {
  display: flex;
  align-items: center;
  width: max-content;
  cursor: pointer;
  list-style: none;
  letter-spacing: 0.06em;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  transition: color 0.2s;
}
.advanced summary::-webkit-details-marker {
  display: none;
}
.advanced summary::after {
  content: "";
  width: 5px;
  height: 5px;
  margin-left: 8px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: translateY(-1px) rotate(45deg);
  transition: transform 0.2s;
}
.advanced[open] summary::after {
  transform: translateY(1px) rotate(-135deg);
}
.advanced summary:hover {
  color: var(--text);
}
.advanced-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 18px;
  margin-top: 16px;
}
.advanced label {
  display: block;
  color: var(--muted);
  font-size: 12px;
}
.notes-label {
  margin-top: 12px;
}
input,
select,
textarea {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 9px 10px;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  font: inherit;
  font-size: 13px;
  outline: none;
  transition:
    border-color 0.2s,
    box-shadow 0.2s;
}
input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(110, 243, 197, 0.12);
}
input[type="file"] {
  padding: 7px;
}
input[type="file"]::file-selector-button {
  margin-right: 12px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--panel-2);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}
textarea {
  min-height: 110px;
  resize: vertical;
  font-family: var(--mono);
  font-size: 12px;
}
.hint {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 12px;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
@media (max-width: 720px) {
  main {
    padding: 0 16px 40px;
  }
  .topbar {
    padding: 14px 16px;
  }
  .statusline {
    right: 14px;
    bottom: 12px;
    max-width: calc(100vw - 28px);
  }
  .brand {
    gap: 9px;
  }
  .wordmark {
    font-size: 12px;
    letter-spacing: 0.1em;
  }
  .topbar-actions {
    gap: 8px;
  }
  .primary {
    padding: 8px 14px;
  }
  .thanks {
    margin-top: 22px;
    gap: 12px;
  }
  .hero {
    min-height: min(540px, calc(100vh - 230px));
  }
  @supports (height: 100svh) {
    .hero {
      min-height: min(540px, calc(100svh - 230px));
    }
  }
  .readout {
    align-items: flex-start;
    gap: 12px;
  }
  .correction {
    font-size: clamp(46px, 15vw, 72px);
  }
  .score {
    font-size: 22px;
  }
  .meta {
    max-width: 42vw;
  }
  #curve {
    height: 320px;
  }
  .advanced-grid {
    grid-template-columns: 1fr;
  }
}