:root {
  --bg: #f5f7ff;
  --bg-gradient-start: #eef2ff;
  --card: #ffffff;
  --panel-gradient-start: #fcfdff;
  --panel-gradient-end: #f5f7ff;
  --primary: #5b6cff;
  --primary-dark: #3d4fe0;
  --accent: #7c3aed;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --success: #10b981;
  --chip-bg: #eef2ff;
  --chip-bg-hover: #e8ebff;
  --copy-bg: #f3f4f6;
  --copy-bg-hover: #e5e7eb;
  --shadow: rgba(91, 108, 255, 0.15);
}

[data-theme="dark"] {
  --bg: #12131c;
  --bg-gradient-start: #171826;
  --card: #1b1d2b;
  --panel-gradient-start: #1e2030;
  --panel-gradient-end: #191b28;
  --primary: #7c8bff;
  --primary-dark: #a5b0ff;
  --accent: #a78bfa;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: #2e3142;
  --success: #34d399;
  --chip-bg: #262940;
  --chip-bg-hover: #2f3350;
  --copy-bg: #262940;
  --copy-bg-hover: #2f3350;
  --shadow: rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Pretendard", "Noto Sans KR", Arial, sans-serif;
  background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg) 100%);
  color: var(--text);
  transition: background 0.25s ease, color 0.25s ease;
}

.wrap {
  max-width: 1000px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}

.hero {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 32px;
  box-shadow: 0 22px 60px var(--shadow);
  transition: background 0.25s ease, border-color 0.25s ease;
}

.top-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

h1 {
  margin: 0 0 10px;
  font-size: 2rem;
  letter-spacing: -0.02em;
}

.theme-toggle {
  width: auto;
  flex-shrink: 0;
  margin-top: 0;
  padding: 8px 12px;
  font-size: 1.2rem;
  line-height: 1;
  background: var(--copy-bg);
  color: var(--text);
  box-shadow: none;
}

.theme-toggle:hover {
  transform: none;
  background: var(--copy-bg-hover);
}

.sub {
  margin: 0 0 24px;
  color: var(--muted);
  line-height: 1.7;
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1.25fr 0.75fr;
}

.panel {
  background: linear-gradient(145deg, var(--panel-gradient-start), var(--panel-gradient-end));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 20px;
}

label {
  display: block;
  font-weight: 700;
  margin-bottom: 8px;
}

input, select, textarea, button {
  width: 100%;
  font: inherit;
  border-radius: 14px;
  border: 1px solid var(--border);
  padding: 12px 14px;
  background: var(--card);
  color: var(--text);
}

input:focus, select:focus, textarea:focus {
  outline: 2px solid rgba(91, 108, 255, 0.2);
  border-color: var(--primary);
}

textarea {
  min-height: 118px;
  resize: vertical;
}

button {
  margin-top: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  box-shadow: 0 8px 20px rgba(91, 108, 255, 0.18);
}

button:hover {
  transform: translateY(-1px);
  background: linear-gradient(135deg, var(--primary-dark), var(--accent));
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.chip {
  padding: 8px 10px;
  border-radius: 999px;
  background: var(--chip-bg);
  color: var(--primary-dark);
  font-size: 0.92rem;
  cursor: pointer;
  border: 1px solid transparent;
}

.chip:hover {
  border-color: var(--primary);
  background: var(--chip-bg-hover);
}

.result-list {
  margin-top: 24px;
  display: grid;
  gap: 12px;
}

.result-card {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 16px;
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.result-card strong {
  display: block;
  margin-bottom: 6px;
  color: var(--primary-dark);
}

.result-card p {
  margin: 0;
  line-height: 1.6;
  flex: 1;
}

.copy-btn {
  margin-top: 0;
  width: auto;
  padding: 8px 10px;
  background: var(--copy-bg);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: none;
  font-size: 0.9rem;
  white-space: nowrap;
}

.copy-btn:hover {
  background: var(--copy-bg-hover);
  transform: none;
}

.copy-btn.copied {
  background: var(--success);
  color: white;
  border-color: var(--success);
}

.empty {
  color: var(--muted);
  border: 1px dashed var(--border);
  background: var(--card);
  padding: 16px;
  border-radius: 14px;
}

.partner-section {
  margin-top: 20px;
}

.partner-section h2 {
  margin: 0 0 10px;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.partner-form {
  background: linear-gradient(145deg, var(--panel-gradient-start), var(--panel-gradient-end));
  max-width: 520px;
}

.partner-status {
  margin-top: 10px;
  font-size: 0.92rem;
  min-height: 1.2em;
}

.partner-status.success {
  color: var(--success);
}

.partner-status.error {
  color: #ef4444;
}

.comments-section {
  margin-top: 20px;
}

.comments-section h2 {
  margin: 0 0 16px;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .hero { padding: 24px; }
  .result-card { flex-direction: column; }
  .copy-btn { width: 100%; }
}