:root { --bg: #0e1014; --card: #171a21; --line: #262a33; --text: #eef0f4; --muted: #a3a9b6; --accent: #2aa3df; --accent-press: #1f8cc2; --on-accent: #ffffff; --warn: #e8b04a; }
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--text); }
body { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 16px; font: 16px/1.55 -apple-system, "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif; }
.card { width: 100%; max-width: 420px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 32px 24px; text-align: center; }
.lock { color: var(--muted); }
h1 { font-size: 20px; margin: 12px 0 8px; font-weight: 700; }
.desc { color: var(--muted); margin: 0 0 20px; font-size: 15px; }
.notice { color: var(--warn); margin: 0 0 16px; font-size: 14px; }
.btn { display: flex; align-items: center; justify-content: center; min-height: 48px; width: 100%; border-radius: 10px; background: var(--accent); color: var(--on-accent); font-weight: 700; text-decoration: none; transition: background-color 150ms ease; }
.btn:hover, .btn:active { background: var(--accent-press); }
.btn:focus-visible, .lang:focus-visible { outline: 2px solid var(--text); outline-offset: 3px; }
.btn[data-state="disabled"] { background: var(--line); color: var(--muted); pointer-events: none; }
.after { color: var(--muted); font-size: 14px; margin: 14px 0 0; }
.lang { display: inline-block; margin-top: 20px; padding: 10px 12px; color: var(--muted); font-size: 14px; text-decoration: none; }
[hidden] { display: none !important; }