/* 플랫폼 화면(로그인·시작 화면) 공통 모양. 제품 화면은 이 파일을 쓰지 않는다(디자인 토큰 통일은 WBS 5.2) */
:root { --bg: #f5f6f8; --card: #fff; --fg: #1c2330; --muted: #5b6577; --line: #dfe3ea; --accent: #2457d6; --accent-fg: #fff; --danger: #b42318; color-scheme: light dark; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f1216; --card: #171b22; --fg: #e6e9ef; --muted: #9aa4b5; --line: #2c3340; --accent: #6f9bff; --accent-fg: #0f1216; --danger: #ff8a80; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", "Malgun Gothic", sans-serif; }
main { max-width: 960px; margin: 0 auto; padding: 32px 16px; }
h1 { font-size: 22px; margin: 0 0 4px; }
.muted { color: var(--muted); }
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login form { width: 100%; max-width: 380px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 28px; }
.login label { display: block; margin: 20px 0 6px; font-weight: 600; }
.login input { width: 100%; padding: 10px 12px; font: inherit; color: inherit; background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
.login input:focus-visible, .login button:focus-visible, .card:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.login button { width: 100%; margin-top: 16px; padding: 10px 12px; font: inherit; font-weight: 600; color: var(--accent-fg); background: var(--accent); border: 0; border-radius: 8px; cursor: pointer; }
.login button[disabled] { opacity: .6; cursor: default; }
.error { margin: 16px 0 0; color: var(--danger); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin-top: 24px; padding: 0; list-style: none; }
.card { display: block; height: 100%; padding: 18px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; color: inherit; text-decoration: none; }
a.card:hover { border-color: var(--accent); }
.card strong { display: block; font-size: 16px; }
.card.off { opacity: .6; }