:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --bg-accent: #ddeeea;
  --panel: rgba(255, 255, 255, 0.88);
  --panel-solid: #ffffff;
  --text: #101828;
  --muted: #667085;
  --line: #d9e1ea;
  --line-strong: #bdcad8;
  --accent: #0f766e;
  --accent-strong: #115e59;
  --accent-soft: #dff5f0;
  --danger: #c2410c;
  --danger-soft: #fff1ed;
  --success: #047857;
  --success-soft: #dcfce7;
  --field: #ffffff;
  --field-shadow: inset 0 1px 0 rgba(16, 24, 40, 0.04);
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.12);
  --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.08);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b1117;
  --bg-accent: #12312d;
  --panel: rgba(17, 25, 34, 0.86);
  --panel-solid: #111922;
  --text: #edf2f7;
  --muted: #9aa8b7;
  --line: #263443;
  --line-strong: #3a4a5d;
  --accent: #2dd4bf;
  --accent-strong: #5eead4;
  --accent-soft: rgba(45, 212, 191, 0.12);
  --danger: #fb923c;
  --danger-soft: rgba(251, 146, 60, 0.12);
  --success: #86efac;
  --success-soft: rgba(134, 239, 172, 0.12);
  --field: #0f1720;
  --field-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, var(--bg-accent), transparent 34rem),
    var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.12) 1px, transparent 1px);
  background-size: 44px 44px;
  content: "";
  mask-image: linear-gradient(to bottom, #000, transparent 70%);
}

button,
input {
  font: inherit;
}

.app-shell {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0;
}

.topbar {
  display: grid;
  grid-template-columns: minmax(0, 720px) auto;
  gap: 24px;
  align-items: start;
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 14px;
  max-width: 760px;
  font-size: clamp(2.15rem, 5vw, 4.25rem);
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 6px;
  font-size: 1.06rem;
  line-height: 1.2;
}

p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.55;
}

.theme-toggle {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  justify-self: end;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px 6px 7px;
  background: var(--panel);
  color: var(--text);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 800;
}

.theme-toggle-track {
  display: grid;
  align-items: center;
  width: 42px;
  height: 28px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 3px;
  background: var(--field);
}

.theme-toggle-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 4px 10px rgba(15, 118, 110, 0.32);
  transition: transform 160ms ease;
}

:root[data-theme="dark"] .theme-toggle-thumb {
  transform: translateX(14px);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.8fr);
  gap: 20px;
  align-items: start;
}

.panel {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 22px;
  backdrop-filter: blur(18px);
}

.panel-header {
  display: flex;
  gap: 16px;
  align-items: start;
  justify-content: space-between;
  margin-bottom: 20px;
}

.form-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.submit-actions {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(112px, 1fr);
  gap: 16px;
  align-items: center;
}

.participants-list {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
}

.participant-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(120px, 180px) 42px;
  gap: 10px;
  align-items: end;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: color-mix(in srgb, var(--panel-solid) 78%, transparent);
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.83rem;
  font-weight: 800;
}

input {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: var(--field);
  box-shadow: var(--field-shadow);
  color: var(--text);
}

input::placeholder {
  color: color-mix(in srgb, var(--muted) 78%, transparent);
}

input:focus {
  border-color: var(--accent);
  outline: 4px solid color-mix(in srgb, var(--accent) 22%, transparent);
}

button {
  min-height: 44px;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 800;
}

button:focus-visible {
  outline: 4px solid color-mix(in srgb, var(--accent) 26%, transparent);
  outline-offset: 2px;
}

.primary-button,
.secondary-button {
  padding: 0 16px;
}

.primary-button {
  width: 100%;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #ffffff;
  box-shadow: 0 12px 24px color-mix(in srgb, var(--accent) 26%, transparent);
}

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

.secondary-button {
  border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line));
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.small-button {
  min-height: 38px;
  padding: 0 12px;
  font-size: 0.84rem;
}

.add-button {
  width: 100%;
}

.icon-button {
  width: 42px;
  border: 1px solid color-mix(in srgb, var(--danger) 36%, var(--line));
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 1.45rem;
  line-height: 1;
}

.results-panel {
  position: sticky;
  top: 20px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 22px;
}

.stats div {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 15px;
  background: color-mix(in srgb, var(--accent-soft) 42%, var(--panel-solid));
}

.stats span,
.result-list small {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

.stats strong {
  display: block;
  margin-top: 7px;
  font-size: clamp(1.18rem, 2vw, 1.45rem);
  line-height: 1.15;
}

.result-block + .result-block {
  margin-top: 22px;
}

.result-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.result-list li {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: color-mix(in srgb, var(--panel-solid) 72%, transparent);
}

.result-list strong {
  display: inline-block;
}

.positive,
.negative {
  flex-shrink: 0;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.86rem;
  font-weight: 800;
}

.positive {
  background: var(--success-soft);
  color: var(--success);
}

.negative {
  background: var(--danger-soft);
  color: var(--danger);
}

.history-panel {
  margin-top: 22px;
}

.empty-state {
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  padding: 18px;
  background: color-mix(in srgb, var(--panel-solid) 62%, transparent);
  text-align: center;
}

.history-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.history-list li {
  display: grid;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: color-mix(in srgb, var(--panel-solid) 72%, transparent);
}

.history-list div {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.history-list strong {
  color: var(--text);
  font-size: 1.05rem;
}

.history-list span,
.history-list small {
  color: var(--muted);
  font-size: 0.86rem;
}

.site-footer {
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  margin-top: 28px;
  border-top: 1px solid var(--line);
  padding: 22px 2px 0;
}

.footer-logo {
  width: min(180px, 48vw);
  height: auto;
}

.footer-logo-dark {
  display: none;
}

:root[data-theme="dark"] .footer-logo-light {
  display: none;
}

:root[data-theme="dark"] .footer-logo-dark {
  display: block;
}

.footer-copy {
  display: grid;
  gap: 6px;
  justify-items: end;
  text-align: right;
}

.site-footer p {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.github-link,
.social-link {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  justify-self: end;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 800;
  text-decoration: none;
}

.github-link:hover,
.social-link:hover {
  color: var(--accent-strong);
}

.github-link svg,
.social-link svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.visitor-counter {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.visitor-counter strong {
  border-radius: 999px;
  padding: 4px 10px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.95rem;
}

.made-with {
  margin-top: 26px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 800;
  text-align: center;
}

@media (max-width: 900px) {
  .topbar {
    grid-template-columns: 1fr;
  }

  .theme-toggle {
    justify-self: start;
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .results-panel {
    position: static;
  }
}

@media (max-width: 560px) {
  .app-shell {
    width: min(100% - 24px, 680px);
    padding: 24px 0;
  }

  .panel {
    padding: 16px;
  }

  .panel-header,
  .result-list li,
  .history-list div {
    align-items: stretch;
    flex-direction: column;
  }

  .form-actions {
    justify-content: stretch;
  }

  .submit-actions {
    grid-template-columns: minmax(0, 2fr) minmax(104px, 1fr);
    gap: 12px;
  }

  .participant-row {
    grid-template-columns: 1fr 42px;
  }

  .participant-row label:first-child {
    grid-column: 1 / -1;
  }

  .stats {
    grid-template-columns: 1fr;
  }

  .theme-toggle {
    width: 100%;
    justify-content: space-between;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-copy {
    justify-items: start;
    text-align: left;
  }

  .github-link,
  .social-link {
    justify-self: start;
  }
}