/* Jiweo — design tokens
   palette: 지우개 흔적(hot red) + 알파 체커보드(회색) + 잉크
------------------------------------------------------------------ */
:root {
  --void: #0b0d10;
  --ink: #16181d;
  --paper: #f1f2ef;
  --card: #ffffff;
  --eraser: #ff3d57;
  --eraser-dim: #ffe3e7;
  --chk-a: #ffffff;
  --chk-b: #d9deda;
  --muted: #6b7178;
  --line: #d9dcd6;
  --line-dark: #262a31;

  --display: "Syne", "Pretendard Variable", Pretendard, sans-serif;
  --body: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;

  --r: 14px;
  --pad: clamp(20px, 5vw, 64px);
  --maxw: 1160px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
}

img,
svg,
canvas {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

h1,
h2,
h3,
p,
figure {
  margin: 0;
}

:focus-visible {
  outline: 2px solid var(--eraser);
  outline-offset: 3px;
}

/* 알파 채널 체커보드 — 이 서비스의 시각 언어 */
.checker {
  background-image: linear-gradient(45deg, var(--chk-b) 25%, transparent 25%),
    linear-gradient(-45deg, var(--chk-b) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--chk-b) 75%),
    linear-gradient(-45deg, transparent 75%, var(--chk-b) 75%);
  background-size: 18px 18px;
  background-position: 0 0, 0 9px, 9px -9px, -9px 0;
  background-color: var(--chk-a);
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

/* ── 타이포 유틸 ─────────────────────────────────────────────── */
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.wordmark {
  font-family: var(--display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.03em;
}

.wordmark em {
  font-style: normal;
  color: var(--eraser);
}

/* ── 버튼 ────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s var(--ease), background 0.15s var(--ease),
    opacity 0.15s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn--accent {
  background: var(--eraser);
}

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn--ghost:hover {
  border-color: var(--ink);
}

.btn--sm {
  height: 38px;
  padding: 0 16px;
  font-size: 14px;
}

.btn--block {
  width: 100%;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}