/* InsightTube 회원 화면 공통 (로그인 · 가입 · 관리자) */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --bg: #f5f5f7; --surface: #ffffff; --text: #1d1d1f; --muted: #7a7a82; --border: #e3e3e8;
    --accent: #7c6ef0; --accent-soft: #efecff; --danger: #d6455d; --ok: #0e8f5b; --shadow: 0 18px 44px rgba(20, 20, 40, 0.09);
    color-scheme: light;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111114; --surface: #1b1b20; --text: #ececf0; --muted: #92929c; --border: #2c2c34;
        --accent: #9d92ff; --accent-soft: #26233a; --danger: #f08080; --ok: #4cc38a; --shadow: 0 18px 44px rgba(0, 0, 0, 0.5);
        color-scheme: dark;
    }
}
body {
    background: var(--bg); color: var(--text); min-height: 100vh; line-height: 1.5; -webkit-font-smoothing: antialiased;
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
}
button, input, select { font: inherit; color: inherit; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 32px 16px; }
.auth-card { width: 100%; max-width: 400px; background: var(--surface); border: 1px solid var(--border); border-radius: 20px; padding: 36px 32px 30px; }
.auth-logo { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.03em; }
.auth-sub { color: var(--muted); font-size: 0.9rem; margin-top: 6px; }
.auth-form { margin-top: 28px; display: grid; gap: 16px; }
.field label { display: block; font-size: 0.8rem; font-weight: 600; color: var(--muted); margin-bottom: 6px; }
.field input, .field select {
    width: 100%; padding: 11px 13px; border-radius: 11px; border: 1px solid var(--border); background: var(--bg); outline: none;
    transition: border-color .2s;
}
.field input:focus, .field select:focus { border-color: var(--accent); }
.field .hint { font-size: 0.76rem; color: var(--muted); margin-top: 5px; }
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 11px 16px; border-radius: 11px;
    border: 1px solid var(--border); background: var(--surface); font-weight: 600; font-size: 0.9rem; cursor: pointer; transition: border-color .2s, opacity .2s;
}
.btn:hover { border-color: var(--muted); }
.btn:disabled { opacity: 0.5; cursor: default; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { border-color: var(--accent); opacity: 0.92; }
.btn-danger { color: var(--danger); }
.btn-danger:hover { border-color: var(--danger); }
.btn-sm { padding: 6px 11px; font-size: 0.8rem; border-radius: 9px; }
.msg { font-size: 0.86rem; min-height: 1.3em; }
.msg.err { color: var(--danger); }
.msg.ok { color: var(--ok); }
.auth-foot { margin-top: 22px; font-size: 0.86rem; color: var(--muted); text-align: center; }

/* 관리자 화면 */
.adm { max-width: 920px; margin: 0 auto; padding: 40px 24px 80px; }
.adm-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.adm-top h1 { font-size: 1.6rem; font-weight: 700; letter-spacing: -0.03em; }
.adm-me { font-size: 0.86rem; color: var(--muted); display: flex; align-items: center; gap: 12px; }
.adm-sec { margin-top: 36px; }
.adm-sec h2 { font-size: 1.05rem; font-weight: 700; letter-spacing: -0.01em; }
.adm-sec .desc { color: var(--muted); font-size: 0.86rem; margin-top: 4px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 20px; margin-top: 14px; }
.row-form { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr) auto; gap: 12px; align-items: end; }
.newcode { margin-top: 16px; padding: 14px 16px; border-radius: 12px; background: var(--accent-soft); display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.newcode b { font-size: 1.25rem; letter-spacing: 0.08em; font-variant-numeric: tabular-nums; }
.list { margin-top: 14px; display: grid; gap: 8px; }
.item { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.item-main { flex: 1 1 220px; min-width: 0; }
.item-title { font-weight: 600; overflow-wrap: anywhere; }
.item-sub { font-size: 0.8rem; color: var(--muted); margin-top: 2px; overflow-wrap: anywhere; }
.item-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.tag { display: inline-block; font-size: 0.7rem; font-weight: 700; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); margin-left: 6px; vertical-align: 1px; }
.tag.admin { color: var(--accent); border-color: var(--accent); }
.tag.off { color: var(--danger); border-color: var(--danger); }
.tag.on { color: var(--ok); border-color: var(--ok); }
.code { font-weight: 700; letter-spacing: 0.06em; font-variant-numeric: tabular-nums; }
.empty { color: var(--muted); font-size: 0.88rem; padding: 14px 2px; }
@media (max-width: 640px) {
    .auth-card { padding: 28px 22px 24px; }
    .row-form { grid-template-columns: 1fr 1fr; }
    .row-form .field:first-child { grid-column: 1 / -1; }
    .row-form .btn { grid-column: 1 / -1; }
}

.check { display: flex; align-items: center; gap: 8px; font-size: 0.86rem; color: var(--muted); cursor: pointer; user-select: none; }
.check input { width: 16px; height: 16px; accent-color: var(--accent); }