:root {
  --bg: #f7f4f2;
  --surface: #ffffff;
  --surface-2: #faf7f5;
  --ink: #1a1a1a;
  --ink-soft: #555;
  --ink-faint: #8a8a8a;
  --line: #e5dfdb;
  --line-strong: #cfc7c2;
  --accent: #d40000;
  --accent-ink: #ffffff;
  --accent-soft: #fdecec;
  --danger: #b0001a;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 2px 12px rgba(0,0,0,.06);
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  max-width: 880px;
  margin: 2.5rem auto 1.5rem;
  padding: 0 1.25rem;
  width: 100%;
}

.brand {
  display: inline-block;
  margin-bottom: 1.25rem;
  line-height: 0;
}
.brand img {
  height: 2.25rem;
  width: auto;
  display: block;
}

.site-header h1 {
  font-size: 1.75rem;
  margin: 0 0 .5rem;
  letter-spacing: -0.01em;
}

.lede {
  color: var(--ink-soft);
  margin: 0;
  max-width: 62ch;
}

.lede a { color: var(--accent); }

main {
  max-width: 880px;
  margin: 0 auto 2rem;
  padding: 0 1.25rem;
  width: 100%;
  flex: 1;
}

form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
}

.card h2 {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
  padding-bottom: .5rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.25rem;
}

.field { display: flex; flex-direction: column; gap: .35rem; }
.field.full, .grid > .full { grid-column: 1 / -1; }

.field > span, .field > label {
  font-weight: 600;
  font-size: .875rem;
  color: var(--ink);
}

.req { color: var(--accent); font-weight: 700; }
.opt { color: var(--ink-faint); font-weight: 400; font-size: .8rem; margin-left: .25rem; }

.hint {
  color: var(--ink-faint);
  font-size: .8rem;
}

input[type="text"],
input[type="email"],
input[type="number"],
select,
textarea {
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  padding: .55rem .7rem;
  width: 100%;
  transition: border-color .12s ease, box-shadow .12s ease;
}
textarea { resize: vertical; min-height: 5rem; }

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

input[aria-invalid="true"],
select[aria-invalid="true"] {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(176, 0, 26, .12);
}

.input-with-unit {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--surface);
}
.input-with-unit:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.input-with-unit input {
  border: none;
  box-shadow: none;
  flex: 1;
  min-width: 0;
}
.input-with-unit input:focus { box-shadow: none; }
.input-with-unit .unit {
  background: var(--surface-2);
  border-left: 1px solid var(--line);
  color: var(--ink-soft);
  padding: 0 .75rem;
  display: flex;
  align-items: center;
  font-size: .85rem;
  white-space: nowrap;
}

.input-with-unit.endurance { padding: 0; }
.segmented {
  display: flex;
  background: var(--surface-2);
  border-left: 1px solid var(--line);
}
.segmented button {
  background: transparent;
  border: none;
  padding: 0 .9rem;
  font: inherit;
  font-size: .85rem;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background .12s ease, color .12s ease;
}
.segmented button[aria-selected="true"] {
  background: var(--ink);
  color: var(--accent-ink);
}
.segmented button + button { border-left: 1px solid var(--line); }

/* Combobox */
.combobox { position: relative; }
.combobox-list {
  position: absolute;
  top: calc(100% + 2px);
  left: 0;
  right: 0;
  max-height: 14rem;
  overflow-y: auto;
  margin: 0;
  padding: .25rem;
  list-style: none;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  z-index: 10;
}
.combobox-list li {
  padding: .45rem .6rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: .9rem;
}
.combobox-list li[aria-selected="true"],
.combobox-list li:hover {
  background: var(--accent-soft);
  color: var(--accent);
}
.combobox-list li.empty {
  color: var(--ink-faint);
  cursor: default;
  font-style: italic;
}

/* Dropzone */
.dropzone {
  border: 2px dashed var(--line-strong);
  border-radius: var(--radius);
  padding: 1.75rem 1rem;
  text-align: center;
  cursor: pointer;
  background: var(--surface-2);
  transition: border-color .12s ease, background .12s ease;
}
.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.dropzone .link { color: var(--accent); text-decoration: underline; }
.dropzone small { display: block; color: var(--ink-faint); margin-top: .25rem; font-size: .8rem; }

.file-list {
  list-style: none;
  margin: .75rem 0 0;
  padding: 0;
  display: grid;
  gap: .4rem;
}
.file-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  padding: .5rem .75rem;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: .85rem;
}
.file-list .file-meta { color: var(--ink-faint); font-size: .8rem; }
.file-list button {
  background: transparent;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font: inherit;
  padding: 0 .25rem;
}

.actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .5rem 0 2rem;
}
#submit-btn {
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  font: inherit;
  font-weight: 600;
  padding: .75rem 1.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background .12s ease, transform .06s ease;
}
#submit-btn:hover { background: #b80000; }
#submit-btn:active { transform: translateY(1px); }
#submit-btn:disabled { background: var(--ink-faint); cursor: wait; }

.status { margin: 0; color: var(--ink-soft); }
.status.error { color: var(--danger); }
.status.success { color: #1a7a1a; }

.site-footer {
  padding: 1.5rem 1.25rem 2.5rem;
  text-align: center;
  color: var(--ink-faint);
  font-size: .8rem;
}

@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
  .site-header { margin-top: 1.5rem; }
  .site-header h1 { font-size: 1.4rem; }
  .card { padding: 1.1rem; }
}