:root {
  color-scheme: light dark;
  --color-background: #f5f7fb;
  --color-surface: #ffffff;
  --color-surface-muted: rgba(255, 255, 255, 0.75);
  --color-border: rgba(17, 24, 39, 0.1);
  --color-border-strong: rgba(17, 24, 39, 0.2);
  --color-text: #111827;
  --color-text-muted: #4b5563;
  --color-primary: #2563eb;
  --color-primary-light: rgba(37, 99, 235, 0.12);
  --color-accent: #0ea5e9;
  --color-warning: #f59e0b;
  --radius-md: 18px;
  --radius-sm: 12px;
  --shadow-md: 0 20px 40px rgba(15, 23, 42, 0.12);
  --shadow-sm: 0 8px 20px rgba(15, 23, 42, 0.08);
  --font-base: "Inter", "Helvetica Neue", Arial, sans-serif;
  --transition-fast: 180ms ease;
}

body {
  background:
    radial-gradient(circle at top, rgba(37, 99, 235, 0.08), transparent 60%),
    var(--color-background);
  color: var(--color-text);
  font-family: var(--font-base);
  line-height: 1.5;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2.5rem 1rem 1.5rem;
  gap: 1.5rem;
}

.site-header__brand {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.site-header__logo {
  font-size: clamp(1.5rem, 2vw + 1rem, 2.2rem);
  font-weight: 700;
  text-decoration: none;
  color: var(--color-text);
}

.site-header__tagline {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.site-nav {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.site-nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-weight: 500;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: var(--color-primary-light);
  color: var(--color-primary);
  outline: none;
}

main {
  width: min(960px, 90vw);
  margin: 0 auto 3rem;
}

.app {
  display: grid;
  gap: 2rem;
  padding-bottom: 3rem;
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: clamp(1.5rem, 2vw + 1rem, 2.5rem);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
}

.hero {
  text-align: left;
  background: linear-gradient(
    135deg,
    rgba(37, 99, 235, 0.12),
    rgba(14, 165, 233, 0.1)
  );
}

.hero h2 {
  margin-top: 0;
  font-size: clamp(2.1rem, 2.5vw + 1.5rem, 2.8rem);
  line-height: 1.1;
}

.hero p {
  max-width: 30rem;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

.hero__actions {
  margin-top: 1.5rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.button {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  background: var(--color-primary);
  color: white;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.18);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 16px 30px rgba(37, 99, 235, 0.24);
  outline: none;
}

.button--ghost {
  background: rgba(255, 255, 255, 0.9);
  color: var(--color-primary);
  border: 1px solid rgba(37, 99, 235, 0.3);
  box-shadow: none;
}

.button--ghost:hover,
.button--ghost:focus-visible {
  background: rgba(37, 99, 235, 0.12);
}

.button--text {
  background: transparent;
  color: var(--color-primary);
  border: none;
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-sm);
  box-shadow: none;
}

.button--text:hover,
.button--text:focus-visible {
  background: var(--color-primary-light);
}

.home-view {
  gap: 2rem;
}

.highlight-list {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
}

.highlight-list li::before {
  content: "•";
  color: var(--color-primary);
  margin-right: 0.5rem;
}

.poll-gallery__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.poll-gallery__list {
  margin-top: 1.5rem;
  display: grid;
  gap: 1.25rem;
}

.poll-card {
  display: grid;
  gap: 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.95),
    rgba(226, 232, 240, 0.8)
  );
}

.poll-card__meta {
  display: grid;
  gap: 0.4rem;
  margin: 0;
}

.poll-card__meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.poll-card__option {
  margin: 0;
  font-weight: 500;
}

.poll-card__description {
  margin: 0;
  color: var(--color-text-muted);
}

.poll-view {
  gap: 2rem;
}

.poll-header__meta {
  display: grid;
  gap: 0.5rem;
  margin: 1rem 0 0;
}

.poll-header__meta-row {
  display: flex;
  gap: 0.75rem;
  font-size: 0.95rem;
}

.poll-header__description {
  margin-bottom: 1rem;
  color: var(--color-text-muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.85rem;
}

.badge--warning {
  background: rgba(245, 158, 11, 0.12);
  color: var(--color-warning);
}

.time-slot-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.time-slot-list__item {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.8);
}

.poll-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.natural-input {
  display: grid;
  gap: 0.75rem;
}

.natural-input__field {
  width: 100%;
  min-height: 120px;
  resize: none;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-strong);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  line-height: 1.4;
  font-family: inherit;
  background: rgba(255, 255, 255, 0.9);
}

.natural-input__field:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.2);
}

.natural-input__label {
  font-weight: 600;
}

.natural-input__meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.availability-preview {
  display: grid;
  gap: 0.75rem;
  border: 1px dashed rgba(37, 99, 235, 0.2);
}

.availability-preview.is-loading .availability-preview__status::after {
  content: "";
  display: inline-block;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  border: 2px solid var(--color-primary);
  border-top-color: transparent;
  margin-left: 0.6rem;
  animation: spin 0.9s linear infinite;
}

.availability-preview.is-error {
  border-color: rgba(239, 68, 68, 0.4);
}

.availability-preview.is-success {
  border-color: rgba(37, 99, 235, 0.4);
}

.availability-preview__slots {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.availability-preview__slots li {
  background: rgba(37, 99, 235, 0.08);
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
}

.availability-preview__meta {
  display: grid;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.vote-form {
  display: grid;
  gap: 1.5rem;
}

.vote-form__grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.vote-form__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.vote-form__status {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.form__field {
  display: grid;
  gap: 0.4rem;
}

.form__field input,
.form__field textarea,
.form__field select {
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-strong);
  padding: 0.65rem 0.85rem;
  font-size: 1rem;
  font-family: inherit;
  background: rgba(255, 255, 255, 0.92);
}

.form__field--inline {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.form__group {
  display: grid;
  gap: 0.75rem;
  border: 1px solid rgba(17, 24, 39, 0.08);
  padding: 1rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.85);
}

.form__actions {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.form__status {
  color: var(--color-text-muted);
}

.form__helper {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.slot-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.slot-list {
  display: grid;
  gap: 0.75rem;
}

.slot-list__item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  background: rgba(37, 99, 235, 0.06);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
}

.slot-list__item p {
  margin: 0;
  font-weight: 500;
}

.advanced-options {
  border: 1px solid rgba(17, 24, 39, 0.08);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.85);
}

.advanced-options__grid {
  display: grid;
  gap: 1rem;
  margin-top: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.examples__list,
.tips__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.examples__list li,
.tips__list li {
  background: rgba(17, 24, 39, 0.04);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.8rem;
}

.results-chart__list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.results-chart__item {
  display: grid;
  gap: 0.5rem;
}

.results-chart__label {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.results-chart__slot {
  font-weight: 600;
}

.results-chart__count {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.results-chart__bar {
  position: relative;
  height: 12px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.14);
  overflow: hidden;
}

.results-chart__bar::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(var(--ratio));
  transform-origin: left;
  transition: transform 300ms ease;
}

.participants__list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.participants__item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.9);
}

.participants__item span {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.page {
  display: grid;
  gap: 2rem;
}

.page--center {
  text-align: center;
  align-items: center;
  justify-items: center;
}

.loading-state {
  align-items: center;
  justify-items: center;
  text-align: center;
  color: var(--color-text-muted);
}

.spinner {
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 4px solid rgba(37, 99, 235, 0.25);
  border-top-color: var(--color-primary);
  animation: spin 0.9s linear infinite;
}

.site-footer {
  text-align: center;
  padding: 2rem 1rem 3rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .poll-actions,
  .vote-form__actions,
  .form__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .poll-card__meta-row,
  .results-header__meta-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}