/* /oauth/callback 페이지(server/src/routes/auth.ts 의 PAGE_CSS)의 디자인 토큰과
   다크/라이트 테마·그리드+glow 배경·브랜드 타일·카드·CTA 스타일을 그대로 가져온다. */
:root {
  --bg: #0a0b0f;
  --panel: #14161d;
  --line: rgba(255, 255, 255, 0.07);
  --line-2: rgba(255, 255, 255, 0.12);
  --fg: #edeef2;
  --muted: #8b91a1;
  --faint: #5c6273;
  --primary: #7180f2;
  --primary-2: #5a6aee;
  --primary-fg: #fff;
  --primary-glow: rgba(113, 128, 242, 0.45);
  --pin: #f8536b;
  --pin-soft: rgba(248, 83, 107, 0.14);
  --ok: #3fcf7f;
  --ok-soft: rgba(63, 207, 127, 0.13);
  --grid-line: rgba(255, 255, 255, 0.035);
  --sh-card: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 1px 2px rgba(0, 0, 0, 0.3),
    0 14px 40px -18px rgba(0, 0, 0, 0.6);
  --font-sans: "Segoe UI Variable", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial,
    "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  color-scheme: dark;
  font-family: var(--font-sans);
  color: var(--fg);
  background: var(--bg);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f3f4f8;
    --panel: #fff;
    --line: rgba(20, 24, 36, 0.09);
    --line-2: rgba(20, 24, 36, 0.14);
    --fg: #161922;
    --muted: #5d6473;
    --faint: #98a0af;
    --primary: #4f5fe0;
    --primary-2: #3f4ecf;
    --primary-glow: rgba(79, 95, 224, 0.3);
    --pin: #e23a54;
    --pin-soft: rgba(226, 58, 84, 0.1);
    --ok: #189a51;
    --ok-soft: rgba(24, 154, 81, 0.1);
    --grid-line: rgba(20, 24, 36, 0.04);
    --sh-card: 0 1px 2px rgba(20, 24, 36, 0.05), 0 18px 44px -20px rgba(20, 24, 36, 0.25);
    color-scheme: light;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  min-width: 320px;
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
  overflow-x: hidden;
}

a {
  color: inherit;
}

/* 그리드 + glow 배경 (콜백 페이지와 동일) */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.7;
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(circle at 50% 36%, #000 0%, transparent 78%);
  mask-image: radial-gradient(circle at 50% 36%, #000 0%, transparent 78%);
}

.glow {
  position: fixed;
  z-index: 0;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.glow-1 {
  width: 520px;
  height: 520px;
  top: -220px;
  left: 50%;
  transform: translateX(-40%);
  background: var(--primary);
  opacity: 0.22;
}

.glow-2 {
  width: 360px;
  height: 360px;
  right: -80px;
  bottom: -160px;
  background: var(--pin);
  opacity: 0.1;
}

.page-shell {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 100svh;
  place-items: center;
  padding: 48px 18px;
}

.hero {
  width: min(640px, 100%);
  text-align: center;
}

/* 브랜드 — 콜백 페이지의 클립 아이콘 타일 + 워드마크 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 26px;
}

.brand-tile {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  color: #fff;
  background: linear-gradient(160deg, var(--primary), var(--primary-2));
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.28);
}

.brand-tile svg {
  width: 16px;
  height: 16px;
}

.brand-name {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 680;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  max-width: 600px;
  margin: 0 auto;
  font-size: clamp(32px, 6vw, 52px);
  font-weight: 680;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.message {
  max-width: 520px;
  margin: 22px auto 0;
  color: var(--muted);
  font-size: 16.5px;
  line-height: 1.7;
}

/* 다운로드 패널 — 콜백 페이지의 .card 표면 그대로 */
.download-panel {
  width: min(460px, 100%);
  margin: 38px auto 0;
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: var(--sh-card);
}

.detected {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.actions {
  display: grid;
  gap: 10px;
}

/* 다운로드 버튼 — 콜백 페이지의 .cta 그라데이션 버튼 */
.download-button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0 1.4em;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(165deg, var(--primary), var(--primary-2));
  color: var(--primary-fg);
  font-family: inherit;
  font-size: 15px;
  font-weight: 560;
  line-height: 1.25;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.18) inset, 0 1px 2px rgba(10, 11, 15, 0.4),
    0 10px 28px -10px var(--primary-glow);
  transition: transform 0.13s cubic-bezier(0.2, 0.8, 0.3, 1), box-shadow 0.18s;
}

.download-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.22) inset, 0 2px 4px rgba(10, 11, 15, 0.4),
    0 16px 40px -10px var(--primary-glow);
}

.download-button:active {
  transform: translateY(0) scale(0.985);
}

.download-button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

.download-button.is-disabled {
  border: 1px solid var(--line-2);
  background: none;
  color: var(--faint);
  cursor: not-allowed;
  box-shadow: none;
}

.download-button.is-disabled:hover {
  transform: none;
  box-shadow: none;
}

.status-note {
  margin: 14px 0 0;
  color: var(--faint);
  font-size: 12.5px;
  line-height: 1.55;
}

[hidden] {
  display: none !important;
}

@media (prefers-reduced-motion: reduce) {
  .download-button {
    transition: none;
  }
}

@media (max-width: 520px) {
  .page-shell {
    align-items: start;
    padding-top: 44px;
  }

  .download-panel {
    padding: 20px 18px;
  }
}