:root {
  --bg-top: #f4f7fc;
  --bg-bottom: #e1e8f4;
  --surface: rgba(255, 255, 255, 0.76);
  --surface-strong: rgba(255, 255, 255, 0.9);
  --panel-border: rgba(255, 255, 255, 0.7);
  --line: #d4deeb;
  --text: #111827;
  --muted: #64748b;
  --accent: #0a84ff;
  --accent-strong: #0066d4;
  --danger: #c9342d;
  --success: #1e7f4b;
  --shadow-lg: 0 28px 54px rgba(33, 57, 96, 0.14);
  --shadow-md: 0 12px 28px rgba(28, 45, 74, 0.1);
}

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

body {
  margin: 0;
  color: var(--text);
  font-family: "SF Pro Text", "SF Pro Display", "Avenir Next", "Nunito Sans", "Segoe UI", sans-serif;
  background:
    radial-gradient(1200px 540px at 12% -8%, #ffffff 0%, transparent 66%),
    radial-gradient(1200px 720px at 100% 120%, #d3e5ff 0%, transparent 70%),
    linear-gradient(155deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
}

.layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(360px, 500px) 1fr;
  gap: 20px;
  padding: 22px;
}

.panel,
.preview {
  background: var(--surface);
  border: 1px solid var(--panel-border);
  border-radius: 26px;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: var(--shadow-lg);
}

.panel {
  padding: 26px 24px 22px;
  max-height: calc(100vh - 44px);
  overflow: auto;
}

.panel h1 {
  margin: 0 0 8px;
  font-size: 1.6rem;
  font-weight: 760;
  letter-spacing: -0.02em;
}

.muted {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.form {
  display: grid;
  gap: 14px;
}

.form label {
  display: grid;
  gap: 8px;
  padding: 10px 12px 12px;
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: #334155;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(211, 220, 232, 0.8);
  border-radius: 16px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.84);
  transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

.form label:hover {
  border-color: #bfd0e8;
  background: rgba(255, 255, 255, 0.75);
}

.form input,
.form textarea,
.form select {
  width: 100%;
  font: inherit;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px 13px;
  font-size: 0.95rem;
  font-weight: 500;
  background: var(--surface-strong);
  box-shadow: 0 1px 2px rgba(27, 42, 67, 0.05);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.form textarea {
  resize: vertical;
  min-height: 90px;
}

.form input::placeholder,
.form textarea::placeholder {
  color: #95a2b5;
}

.form input:focus,
.form textarea:focus,
.form select:focus {
  outline: none;
  border-color: #6cb3ff;
  box-shadow:
    0 0 0 4px rgba(10, 132, 255, 0.17),
    0 8px 18px rgba(10, 132, 255, 0.12);
}

.checkRow {
  display: flex !important;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 700;
}

.checkRow input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding-top: 4px;
}

button {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 14px;
  padding: 11px 16px;
  font-size: 0.95rem;
  font-weight: 730;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease, background-color 0.18s ease;
}

button:active {
  transform: translateY(1px);
}

button[type="submit"] {
  color: #ffffff;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-strong) 100%);
  box-shadow: 0 10px 20px rgba(10, 132, 255, 0.28);
}

button[type="submit"]:hover {
  box-shadow: 0 14px 24px rgba(10, 132, 255, 0.32);
}

button[type="button"] {
  color: #1f2937;
  background: #edf1f6;
  border-color: #d6dfeb;
  box-shadow: 0 6px 16px rgba(44, 58, 82, 0.14);
}

button[type="button"]:hover {
  background: #f4f7fb;
}

button[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

.hint {
  margin: -4px 2px 2px;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
}

.hint.success {
  color: var(--success);
}

.hint.error {
  color: var(--danger);
}

.hint a {
  color: var(--accent-strong);
  font-weight: 650;
  text-underline-offset: 2px;
}

.captchaWrap {
  margin-top: -2px;
  padding: 10px 12px 12px;
  border: 1px solid #d3dbe8;
  border-radius: 14px;
  background: rgba(246, 250, 255, 0.85);
}

.captchaWidget {
  min-height: 66px;
}

.error {
  margin: 0;
  color: var(--danger);
  font-size: 0.88rem;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(201, 52, 45, 0.22);
  background: rgba(201, 52, 45, 0.08);
}

.preview {
  display: grid;
  grid-template-rows: auto 1fr;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  position: relative;
}

.previewHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 18px;
  border-bottom: 1px solid rgba(206, 216, 229, 0.9);
  background: rgba(255, 255, 255, 0.82);
}

.previewHeader h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 720;
}

.badge {
  border-radius: 999px;
  padding: 4px 11px;
  background: #edf3fb;
  color: #34445f;
  font-size: 0.78rem;
  font-weight: 650;
}

#previewFrame {
  width: 100%;
  border: 0;
  background: #fff;
  height: 82vh;
  min-height: 740px;
}

.previewNotice {
  position: absolute;
  top: 76px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  width: min(92%, 760px);
  pointer-events: none;
}

.previewNoticeCard {
  pointer-events: auto;
  border-radius: 16px;
  padding: 14px 16px;
  border: 1px solid #d8e2f0;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 14px 30px rgba(35, 55, 85, 0.2);
  display: grid;
  gap: 8px;
  justify-items: center;
  text-align: center;
}

.previewNoticeCard.is-loading {
  border-color: #9cc8ff;
  background: rgba(240, 248, 255, 0.97);
}

.previewNoticeCard.is-success {
  border-color: #8ad0ab;
  background: rgba(237, 252, 244, 0.97);
}

.previewNoticeCard.is-error {
  border-color: #efb6b3;
  background: rgba(255, 242, 241, 0.97);
}

.previewNoticeText {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 680;
  line-height: 1.35;
  color: #1f2a44;
}

.previewNoticeCard.is-loading .previewNoticeText {
  color: #0c4a95;
}

.previewNoticeCard.is-success .previewNoticeText {
  color: #185b36;
}

.previewNoticeCard.is-error .previewNoticeText {
  color: #8a251f;
}

.previewNoticeLink {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 7px 12px;
  border-radius: 10px;
  border: 1px solid #c9d7ea;
  background: #ffffff;
  color: #0a62d0;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.previewNoticeLink:hover {
  background: #f4f8ff;
}

.previewNoticeLink[hidden] {
  display: none !important;
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(460px, 1fr);
    padding: 16px;
  }

  .panel {
    max-height: none;
  }

  #previewFrame {
    height: 72vh;
    min-height: 560px;
  }
}

@media (max-width: 720px) {
  .layout {
    gap: 14px;
    padding: 12px;
  }

  .panel,
  .preview {
    border-radius: 20px;
  }

  .panel {
    padding: 18px 16px;
  }

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

  #previewFrame {
    min-height: 500px;
  }

  .previewNotice {
    top: 70px;
    width: min(94%, 640px);
  }

  .previewNoticeCard {
    padding: 12px 14px;
  }

  .previewNoticeText {
    font-size: 0.95rem;
  }
}