@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,650&family=Sora:wght@400;500;600&display=swap");

:root {
  --ink: #1a2332;
  --ink-muted: #5a6578;
  --ink-faint: #8a93a3;
  --paper: #f7f4ef;
  --surface: rgba(255, 255, 255, 0.86);
  --border: #d5d0c8;
  --border-strong: #b9b3aa;
  --accent: #2f6f6a;
  --accent-hover: #245954;
  --accent-soft: rgba(47, 111, 106, 0.12);
  --danger: #a33b3b;
  --danger-soft: rgba(163, 59, 59, 0.1);
  --success: #2f7a45;
  --radius: 12px;
  --shadow: 0 18px 50px rgba(26, 35, 50, 0.1);
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Sora", system-ui, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "SFMono-Regular", Menlo, monospace;

  /* submito dialog theme */
  --submito-accent: var(--accent);
  --submito-success: var(--success);
  --submito-error: var(--danger);
  --submito-font: var(--font-body);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  background-color: #dfe8e4;
  background-image:
    radial-gradient(ellipse 80% 50% at 10% -10%, #c5ddd6 0%, transparent 55%),
    radial-gradient(ellipse 70% 45% at 100% 0%, #e8d9c4 0%, transparent 50%),
    linear-gradient(165deg, #e7eee9 0%, #d4e0db 45%, #cfd6e0 100%);
  background-attachment: fixed;
}

code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 0.08em 0.3em;
  border-radius: 4px;
  background: rgba(26, 35, 50, 0.06);
}

.shell {
  width: min(100% - 2rem, 72rem);
  margin: 0 auto;
  padding: 1.5rem 0 4rem;
}

/* ---------- header ---------- */

.masthead {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 2.25rem;
}

.masthead__brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 650;
  color: var(--accent);
  text-decoration: none;
}

.masthead__tag {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.masthead__link {
  margin-left: auto;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
}

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

.intro {
  max-width: 44rem;
  margin-bottom: 1.5rem;
}

.intro__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4vw, 2.4rem);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.intro__lead {
  margin: 0.65rem 0 0;
  color: var(--ink-muted);
}

/* ---------- controls ---------- */

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 1rem 1.5rem;
  margin-bottom: 1.5rem;
  padding: 0.9rem 1rem;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(213, 208, 200, 0.85);
  border-radius: var(--radius);
}

.controls__label {
  display: block;
  margin-bottom: 0.35rem;
  padding: 0;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  border: 0;
}

.segmented legend {
  float: left;
  width: 100%;
}

.segmented label {
  position: relative;
}

.segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented span {
  display: block;
  padding: 0.4rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-muted);
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--border);
  border-radius: 7px;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.segmented label:hover span {
  color: var(--ink);
  border-color: var(--border-strong);
}

.segmented input:checked + span {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.segmented input:focus-visible + span {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.controls__select select {
  min-width: 16rem;
  padding: 0.45rem 2rem 0.45rem 0.7rem;
  font: inherit;
  font-size: 0.85rem;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 7px;
}

/* ---------- layout ---------- */

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 22rem);
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

.tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
  padding: 0.25rem;
  background: rgba(255, 255, 255, 0.45);
  border: 1px solid rgba(213, 208, 200, 0.85);
  border-radius: 10px;
}

.tabs__tab {
  flex: 1;
  appearance: none;
  padding: 0.55rem 0.85rem;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-muted);
  background: transparent;
  border: 0;
  border-radius: 7px;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.tabs__tab:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.55);
}

.tabs__tab[aria-selected="true"] {
  color: var(--ink);
  background: #fff;
}

.tabs__tab:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.panel__hint {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  color: var(--ink-muted);
}

/* ---------- form card ---------- */

.card {
  padding: 1.4rem 1.5rem 1.5rem;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 1rem;
}

@media (max-width: 560px) {
  .grid-2 {
    grid-template-columns: minmax(0, 1fr);
  }
}

.section {
  margin: 0 0 0.75rem;
  padding: 0;
  border: 0;
}

.section__title {
  margin: 0 0 0.75rem;
  padding: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 650;
}

.field {
  display: block;
  margin-bottom: 1.05rem;
}

.field--narrow {
  max-width: 14rem;
}

.field__label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--ink-muted);
}

.field__label small {
  font-weight: 400;
  color: var(--ink-faint);
}

.field input:not([type="checkbox"], [type="radio"]),
.field select,
.field textarea {
  display: block;
  width: 100%;
  padding: 0.65rem 0.8rem;
  font: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.field textarea {
  min-height: 5.5rem;
  resize: vertical;
  line-height: 1.45;
}

.field input[type="file"] {
  padding: 0.5rem 0.6rem;
  font-size: 0.8rem;
  cursor: pointer;
}

.field input[type="file"]::file-selector-button {
  margin-right: 0.7rem;
  padding: 0.3rem 0.65rem;
  font: inherit;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border: 0;
  border-radius: 6px;
  cursor: pointer;
}

.field input::placeholder,
.field textarea::placeholder {
  color: #9aa3b2;
}

.field input:hover,
.field select:hover,
.field textarea:hover {
  border-color: var(--border-strong);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  background: #fff;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* submito adds aria-invalid on controls and .error on the wrapper */
.field [aria-invalid="true"] {
  border-color: var(--danger) !important;
  background: #fff8f8 !important;
  box-shadow: 0 0 0 3px var(--danger-soft) !important;
}

.error-message {
  display: block;
  flex-basis: 100%;
  margin-top: 0.4rem;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--danger);
}

.choices {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  margin-bottom: 1rem;
}

.choices > .field__label {
  flex-basis: 100%;
  margin-bottom: 0;
}

.choice {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  cursor: pointer;
}

.choice--single {
  display: flex;
  margin-bottom: 0.75rem;
}

.choice input {
  width: 1rem;
  height: 1rem;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.choices.error > .field__label,
.choice.error {
  color: var(--danger);
}

.iti {
  display: block;
  width: 100%;
}

.hint {
  margin: 0 0 1rem;
  font-size: 0.8rem;
  color: var(--ink-muted);
}

.notice {
  margin: 0 0 1rem;
  padding: 0.65rem 0.85rem;
  font-size: 0.85rem;
  border-radius: 8px;
}

.notice--success {
  color: var(--success);
  background: rgba(47, 122, 69, 0.1);
}

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

.demo-form__footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.4rem;
}

.button {
  appearance: none;
  padding: 0.7rem 1.3rem;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.12s ease, opacity 0.15s ease;
}

.button:hover:not(:disabled) {
  background: var(--accent-hover);
}

.button:active:not(:disabled) {
  transform: translateY(1px);
}

.button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.button--ghost {
  color: var(--accent);
  background: transparent;
}

.button--ghost:hover:not(:disabled) {
  background: var(--accent-soft);
}

.indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent);
}

.indicator[hidden] {
  display: none;
}

.indicator__spinner {
  width: 0.95rem;
  height: 0.95rem;
  border: 2px solid var(--accent-soft);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* ---------- inspector ---------- */

.inspector {
  position: sticky;
  top: 1rem;
  display: grid;
  gap: 0.9rem;
}

.panel {
  padding: 0.85rem 1rem 1rem;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(213, 208, 200, 0.85);
  border-radius: var(--radius);
}

.panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.55rem;
}

.panel__title {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.panel__action {
  padding: 0.15rem 0.5rem;
  font: inherit;
  font-size: 0.75rem;
  color: var(--accent);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

.log {
  display: grid;
  gap: 0.35rem;
  max-height: 16rem;
  margin: 0;
  padding: 0;
  overflow: auto;
  list-style: none;
  font-size: 0.75rem;
}

.log:empty::before {
  content: "Events fired on each <form> appear here.";
  color: var(--ink-faint);
}

.log__item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.1rem 0.5rem;
  padding: 0.4rem 0.55rem;
  background: rgba(255, 255, 255, 0.75);
  border-left: 3px solid var(--border-strong);
  border-radius: 6px;
}

.log__item time {
  font-family: var(--font-mono);
  color: var(--ink-faint);
}

.log__item strong {
  font-family: var(--font-mono);
  font-weight: 600;
}

.log__target {
  font-family: var(--font-mono);
  color: var(--ink-muted);
}

.log__detail {
  grid-column: 1 / -1;
  color: var(--ink-muted);
  word-break: break-word;
}

.log__item--success { border-left-color: var(--success); }
.log__item--error,
.log__item--invalid { border-left-color: var(--danger); }
.log__item--before { border-left-color: var(--accent); }

.code {
  max-height: 16rem;
  margin: 0;
  padding: 0.7rem 0.8rem;
  overflow: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.55;
  color: var(--ink);
  white-space: pre-wrap;
  word-break: break-word;
  background: rgba(255, 255, 255, 0.75);
  border-radius: 8px;
}

@media (max-width: 420px) {
  .card {
    padding: 1.2rem 1.05rem;
  }

  .demo-form__footer .button {
    flex: 1;
  }
}