* { box-sizing: border-box; }

:root {
  --paper: #F4F5F2;
  --surface: #FFFFFF;
  --surface-raised: #FBFBFA;
  --ink: #14161B;
  --ink-muted: #5B6472;
  --ink-faint: #8A93A3;
  --ink-soft: #EBEBE7;
  --line: #DCDEDA;
  --line-strong: #B7BAB4;
  --masthead-bg: #14161B;
  --masthead-fg: #F4F5F2;
  --accent: #1a4fd6;
  --good: #1F7A4D;
  --good-soft: #E3F1E9;
  --shadow: 0 1px 2px rgba(20,22,27,0.05), 0 8px 24px rgba(20,22,27,0.07);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #101114;
    --surface: #1A1C21;
    --surface-raised: #202227;
    --ink: #EDEDEA;
    --ink-muted: #9EA3AC;
    --ink-faint: #6B7078;
    --ink-soft: #2A2C31;
    --line: #303338;
    --line-strong: #45484E;
    --masthead-bg: #000000;
    --masthead-fg: #F4F5F2;
    --accent: #6C93F4;
    --good: #4BAE7C;
    --good-soft: #17281F;
    --shadow: 0 1px 2px rgba(0,0,0,0.35), 0 10px 26px rgba(0,0,0,0.4);
  }
}

html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.55;
}

.topbar {
  background: var(--masthead-bg);
  color: var(--masthead-fg);
  padding: 24px 20px;
  text-align: center;
}
.topbar h1 { margin: 0 0 6px; font-size: 21px; font-weight: 650; letter-spacing: 0.3px; }
.topbar p { margin: 0; font-size: 12.5px; color: rgba(244,245,242,0.65); }

main { max-width: 680px; margin: 0 auto; padding: 28px 20px 80px; }

.intro-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 22px 24px;
  margin-bottom: 26px;
  font-size: 14.5px;
  color: var(--ink-muted);
  white-space: pre-wrap;
}

.section-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 24px 24px 8px;
  margin-bottom: 20px;
}

.section-card h2 {
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 7px;
  color: var(--ink);
}
.field label .req { color: #B23A2C; margin-inline-start: 3px; }

.field input[type="text"],
.field input[type="email"],
.field input[type="tel"],
.field input[type="date"],
.field textarea {
  display: block;
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: var(--surface);
  color: var(--ink);
  font-size: 14.5px;
  font-family: inherit;
}
.field input:focus, .field textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.field textarea { resize: vertical; min-height: 84px; }

.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.checkbox-chip {
  border: 1px solid var(--line-strong);
  border-radius: 100px;
  padding: 8px 16px;
  font-size: 13.5px;
  cursor: pointer;
  background: var(--surface);
  color: var(--ink);
  user-select: none;
}
.checkbox-chip.checked {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.submit-row { margin-top: 8px; }
.btn-submit {
  width: 100%;
  background: var(--ink);
  color: var(--paper);
  border: none;
  border-radius: 10px;
  padding: 15px;
  font-size: 15.5px;
  font-weight: 650;
  cursor: pointer;
  box-shadow: var(--shadow);
}
.btn-submit:hover { opacity: 0.9; }
.btn-submit:disabled { opacity: 0.5; cursor: default; }

.error-msg {
  color: #B23A2C;
  font-size: 13px;
  margin-top: 10px;
  text-align: center;
}

.success-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 44px 28px;
  text-align: center;
}
.success-card .icon { font-size: 40px; margin-bottom: 14px; }
.success-card h2 { margin: 0 0 8px; font-size: 19px; font-weight: 650; }
.success-card p { color: var(--ink-muted); font-size: 14px; margin: 0; }

/* admin view */
.admin-list { display: flex; flex-direction: column; gap: 14px; }
.resp-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.resp-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 16px 20px;
  cursor: pointer;
}
.resp-summary .name { font-weight: 650; font-size: 15px; }
.resp-summary .meta { font-size: 12px; color: var(--ink-faint); }
.resp-detail {
  display: none;
  padding: 0 20px 20px;
  border-top: 1px solid var(--line);
}
.resp-detail.open { display: block; }
.resp-row {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.resp-row:last-child { border-bottom: none; }
.resp-row .k { font-size: 11px; font-weight: 650; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 3px; }
.resp-row .v { font-size: 14px; white-space: pre-wrap; word-break: break-word; }
.resp-delete {
  border: 1px solid #B23A2C;
  color: #B23A2C;
  background: none;
  border-radius: 7px;
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
  margin-top: 14px;
}
.resp-delete:hover { background: #B23A2C; color: #fff; }

.status-msg { text-align: center; color: var(--ink-faint); font-size: 13px; margin-bottom: 16px; }