:root {
  /* Light Mode (Default) */
  --bg: #f0f2f5;
  --card: #ffffff;
  --line: #d9deeb;
  --txt: #1c1e21;
  --muted: #606770;
  --accent: #1877f2;
  --bg-gradient-start: #d4d9e2;
  --card-gradient-start: rgba(0, 0, 0, 0.02);
  --card-gradient-end: rgba(0, 0, 0, 0);
  --card-border: rgba(0, 0, 0, 0.1);
  --input-bg: #e4e6eb;
  --input-border: rgba(0, 0, 0, 0.15);
  --danger-border: rgba(250, 69, 4, 0.4);
  --danger-bg: rgba(250, 69, 4, 0.1);
  --primary-border: rgba(24, 119, 242, 0.4);
  --primary-bg: rgba(24, 119, 242, 0.1);
  --radio-bg: #dce0e6;
  --radio-border: rgba(0,0,0,0.1);
  --note-bg: rgba(0,0,0,0.03);
  --box-bg: rgba(0,0,0,0.01);
  --box-border: rgba(0,0,0,0.05);
}

html[data-theme='dark'] {
  --bg: #0b0f14;
  --card: #121823;
  --line: #243041;
  --txt: #e8edf6;
  --muted: #a8b3c7;
  --accent: #6ee7b7;
  --bg-gradient-start: #132033;
  --card-gradient-start: rgba(255, 255, 255, 0.04);
  --card-gradient-end: rgba(255, 255, 255, 0.02);
  --card-border: rgba(255, 255, 255, 0.08);
  --input-bg: rgba(10, 14, 20, 0.55);
  --input-border: rgba(255, 255, 255, 0.10);
  --danger-border: rgba(248, 113, 113, 0.35);
  --danger-bg: rgba(248, 113, 113, 0.12);
  --primary-border: rgba(110, 231, 183, 0.35);
  --primary-bg: rgba(110, 231, 183, 0.14);
  --radio-bg: rgba(10,14,20,0.45);
  --radio-border: rgba(255,255,255,0.10);
  --note-bg: rgba(0,0,0,0.18);
  --box-bg: rgba(255,255,255,0.02);
  --box-border: rgba(255,255,255,0.06);
}

* { box-sizing: border-box; }
body {
  margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans KR", sans-serif;
  background: radial-gradient(1200px 700px at 20% 0%, var(--bg-gradient-start), var(--bg));
  color: var(--txt);
  transition: background-color 0.3s, color 0.3s;
}
header { padding: 28px 18px 14px; max-width: 1100px; margin: 0 auto; }
.header-content { display: flex; justify-content: space-between; align-items: center; }
h1 { margin: 0 0 8px; font-size: 22px; letter-spacing: -0.2px; }
.sub { margin: 0; color: var(--muted); font-size: 13px; }

main { max-width: 1100px; margin: 0 auto; padding: 14px 18px 40px; display: grid; gap: 14px; grid-template-columns: 420px 1fr; }
@media (max-width: 900px) { main { grid-template-columns: 1fr; } }

.card {
  background: linear-gradient(180deg, var(--card-gradient-start), var(--card-gradient-end));
  border: 1px solid var(--card-border);
  border-radius: 16px; padding: 14px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.25);
  background-color: var(--card);
}

label { display: block; font-size: 12px; color: var(--muted); margin: 10px 0 6px; }
input, textarea, select {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--txt);
  border-radius: 12px;
  padding: 10px 11px;
  outline: none;
}
textarea { min-height: 92px; resize: vertical; }
input:focus, textarea:focus, select:focus {
    border-color: rgba(var(--accent), 0.55);
    box-shadow: 0 0 0 3px rgba(var(--accent), 0.12);
}

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 520px) { .row { grid-template-columns: 1fr; } }

.sep { height: 1px; background: var(--input-border); margin: 12px 0; }
.muted { color: var(--muted); }
.small { font-size: 12px; }

.btns { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
button {
  cursor: pointer;
  border: 1px solid var(--input-border);
  background: rgba(255,255,255,0.05);
  color: var(--txt);
  padding: 10px 12px;
  border-radius: 12px;
  font-weight: 600;
}
button.primary {
    border-color: var(--primary-border);
    background: var(--primary-bg);
}
button.danger {
    border-color: var(--danger-border);
    background: var(--danger-bg);
}

.theme-toggle-button {
  border-color: var(--primary-border);
  background: var(--primary-bg);
}
html[data-theme='dark'] .theme-toggle-button {
  border-color: var(--danger-border);
  background: var(--danger-bg);
}


.sectionTitle { margin: 0 0 8px; font-size: 14px; letter-spacing: -0.1px; }

.scaleLegend {
  display: grid; grid-template-columns: 1fr;
  gap: 6px; padding: 10px 10px 8px;
  border: 1px solid var(--input-border);
  border-radius: 12px; background: var(--input-bg);
  margin-bottom: 10px;
}
.legendLine { font-size: 12px; color: var(--muted); }
.legendLine b { color: var(--txt); }

.scaleGroup {
  border: 1px solid var(--input-border);
  border-radius: 14px;
  padding: 10px;
  background: var(--input-bg);
  margin-bottom: 10px;
}
.scaleHeader {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 10px; margin-bottom: 8px;
}
.scaleHeader .k { font-size: 13px; font-weight: 700; }
.scaleHeader .hint { font-size: 12px; color: var(--muted); }

.scaleRow { display: grid; grid-template-columns: 1fr; gap: 8px; }
.scaleItem {
  display: grid; grid-template-columns: 140px 1fr; gap: 10px; align-items: center;
  padding: 8px; border-radius: 12px;
  border: 1px solid var(--box-border);
  background: var(--box-bg);
}
@media (max-width: 520px) { .scaleItem { grid-template-columns: 1fr; } }

.scaleItem .name { font-size: 12px; color: var(--muted); }
.radio5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; align-items: center; }
.radio5 label {
  margin: 0;
  font-size: 12px;
  padding: 8px 0;
  border-radius: 10px;
  text-align: center;
  border: 1px solid var(--radio-border);
  background: var(--radio-bg);
  cursor: pointer;
  user-select: none;
}
.radio5 input { display: none; }
.radio5 input:checked + span {
  display: block;
  border-radius: 10px;
  outline: 2px solid var(--accent);
  background: var(--primary-bg);
  color: var(--txt);
  padding: 8px 0;
}
.radio5 label span { display:block; padding: 8px 0; border-radius: 10px; }

.toolbar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.toolbar input { max-width: 520px; }
.right { margin-left: auto; }

.list { margin-top: 12px; display: grid; gap: 10px; }
.note {
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 12px;
  background: var(--note-bg);
}
.noteTop { display:flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.noteTitle { margin: 0; font-size: 15px; }
.meta { margin: 6px 0 0; font-size: 12px; color: var(--muted); line-height: 1.45; }

.grid2 { display:grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }
@media (max-width: 760px) { .grid2 { grid-template-columns: 1fr; } }
.box {
  border: 1px solid var(--box-border);
  border-radius: 12px;
  padding: 10px;
  background: var(--box-bg);
}
.box h3 { margin: 0 0 6px; font-size: 13px; }
.kv { font-size: 12px; color: var(--muted); line-height: 1.55; white-space: pre-wrap; }

.noteActions { display:flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }