:root {
  color-scheme: light;
  --bg: #f3f5f8;
  --surface: #ffffff;
  --surface-2: #f0f2f6;
  --surface-3: #e6eaf0;
  --border: #e0e4eb;
  --border-strong: #c9d0db;
  --text: #141821;
  --text-2: #3b4352;
  --muted: #6b7484;
  --accent: #2f5bd3;
  --accent-hover: #2549ae;
  --accent-ink: #ffffff;
  --accent-soft: #e8eefc;
  --ok: #0d7a53;
  --ok-soft: #e1f4ea;
  --warn: #a35a06;
  --warn-soft: #fcf0dc;
  --danger: #c0341c;
  --danger-soft: #fce9e5;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 4px 14px rgba(16, 24, 40, .06);
  --shadow-lg: 0 16px 40px rgba(16, 24, 40, .2);
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-full: 999px;
  --fs-xs: 12px;
  --fs-sm: 13px;
  --fs-md: 15px;
  --fs-lg: 17px;
  --fs-xl: 21px;
  --font: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0e1116;
    --surface: #161a21;
    --surface-2: #1c212a;
    --surface-3: #252b36;
    --border: #2a303b;
    --border-strong: #3a4250;
    --text: #e8ebf0;
    --text-2: #c3c9d3;
    --muted: #8f98a8;
    --accent: #6f93f2;
    --accent-hover: #89a7f5;
    --accent-ink: #0b1124;
    --accent-soft: #1d2741;
    --ok: #4cc795;
    --ok-soft: #12291f;
    --warn: #e8a54a;
    --warn-soft: #2d2213;
    --danger: #f0806b;
    --danger-soft: #331a15;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 4px 14px rgba(0, 0, 0, .3);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, .55);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0e1116;
  --surface: #161a21;
  --surface-2: #1c212a;
  --surface-3: #252b36;
  --border: #2a303b;
  --border-strong: #3a4250;
  --text: #e8ebf0;
  --text-2: #c3c9d3;
  --muted: #8f98a8;
  --accent: #6f93f2;
  --accent-hover: #89a7f5;
  --accent-ink: #0b1124;
  --accent-soft: #1d2741;
  --ok: #4cc795;
  --ok-soft: #12291f;
  --warn: #e8a54a;
  --warn-soft: #2d2213;
  --danger: #f0806b;
  --danger-soft: #331a15;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 4px 14px rgba(0, 0, 0, .3);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, .55);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: var(--fs-md);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
button:disabled { cursor: default; opacity: .55; }
a { color: var(--accent); }
.hidden { display: none !important; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.i {
  width: 18px;
  height: 18px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.i-sm { width: 15px; height: 15px; }
.i-lg { width: 22px; height: 22px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  background: var(--surface);
  color: var(--text);
  font-size: var(--fs-sm);
  font-weight: 600;
  white-space: nowrap;
}
.btn:hover:not(:disabled) { background: var(--surface-2); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-danger { color: var(--danger); border-color: var(--border-strong); }
.btn-danger:hover:not(:disabled) { background: var(--danger-soft); }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-ghost:hover:not(:disabled) { background: var(--surface-2); }
.btn-block { width: 100%; min-height: 46px; font-size: var(--fs-md); }
.btn-sm { min-height: 30px; padding: 0 10px; font-size: var(--fs-xs); border-radius: var(--r-sm); }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: var(--r-md);
  background: transparent;
  color: var(--text-2);
}
.icon-btn:hover:not(:disabled) { background: var(--surface-2); color: var(--text); }

.field { display: flex; flex-direction: column; gap: 6px; }
.field > span { font-size: var(--fs-sm); font-weight: 600; color: var(--text-2); }
.input, .field input, .field select, .field textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  background: var(--surface);
  font-size: 16px;
  outline: none;
}
.field textarea { min-height: 88px; resize: vertical; line-height: 1.5; }
.input:focus, .field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.input:focus-visible, .field :focus-visible { outline: none; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 22px;
  padding: 0 8px;
  border-radius: var(--r-full);
  background: var(--surface-3);
  color: var(--text-2);
  font-size: var(--fs-xs);
  font-weight: 600;
  white-space: nowrap;
}
.chip-accent { background: var(--accent-soft); color: var(--accent); }
.chip-ok { background: var(--ok-soft); color: var(--ok); }
.chip-warn { background: var(--warn-soft); color: var(--warn); }
.chip-danger { background: var(--danger-soft); color: var(--danger); }

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: var(--r-full);
  background: var(--danger);
  color: #fff;
  font-size: var(--fs-xs);
  font-weight: 700;
}

.toasts {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: max-content;
  max-width: calc(100vw - 32px);
  transform: translateX(-50%);
  pointer-events: none;
}
.toast {
  padding: 10px 16px;
  border-radius: var(--r-md);
  background: var(--text);
  color: var(--bg);
  font-size: var(--fs-sm);
  box-shadow: var(--shadow-lg);
  animation: toast-in .18s ease-out;
}
.toast-err { background: var(--danger); color: #fff; }
@keyframes toast-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .toast { animation: none; } }