/* THE SUIT 강사 정성원 — 학습실·관리자·로그인 화면 공통 스타일 (네이비·화이트) */
:root {
  --navy: #16213d; --navy-2: #22305a; --ink: #1a1f2e; --muted: #4a5266; --line: #e3e6ec;
  --bg: #ffffff; --soft: #f6f7fa; --ivory: #f4eee1; --gold: #9a7a3f;
  --ok: #1c7c4f; --ok-bg: #e8f5ee; --warn: #9a5b00; --warn-bg: #fdf3df; --danger: #b3261e; --danger-bg: #fdecea;
  --radius: 8px; --max: 1120px;
  --font: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", -apple-system, BlinkMacSystemFont, sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.65; font-size: 16px; word-break: keep-all; overflow-wrap: anywhere; }
h1, h2, h3 { line-height: 1.35; margin: 0 0 .5em; color: var(--navy); letter-spacing: -.01em; }
h1 { font-size: 1.6rem; } h2 { font-size: 1.2rem; } h3 { font-size: 1.02rem; }
p { margin: 0 0 1em; }
a { color: var(--navy-2); text-underline-offset: 3px; }
img { max-width: 100%; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
main { min-height: 62vh; padding: 28px 0 64px; }
.muted { color: var(--muted); } .small { font-size: .875rem; } .right { text-align: right; }
.hidden { display: none !important; }
.stack > * + * { margin-top: 16px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.row.between { justify-content: space-between; }
.eyebrow { font-size: .78rem; letter-spacing: .14em; text-transform: uppercase; color: var(--gold); font-weight: 600; margin-bottom: 6px; }

/* 머리말 (공개 홈페이지와 같은 흰 상단바) */
#site-header { background: var(--bg); color: var(--ink); position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--line); }
#site-header .bar { display: flex; align-items: center; gap: 12px; min-height: 58px; }
.brand { color: var(--ink); text-decoration: none; margin-right: auto; white-space: nowrap; }
.brand strong { font-size: 1.12rem; font-weight: 800; letter-spacing: .1em; }
.brand span { font-size: .85rem; font-weight: 500; color: var(--muted); margin-left: 8px; }
.nav { display: flex; gap: 2px; }
.nav a { color: var(--muted); text-decoration: none; padding: 8px 10px; border-radius: 6px; font-size: .95rem; font-weight: 500; white-space: nowrap; }
.nav a:hover { color: var(--ink); background: var(--soft); }
.nav a[aria-current="page"] { color: var(--ink); font-weight: 700; background: var(--soft); }
#site-footer { border-top: 1px solid var(--line); padding: 24px 0; color: var(--muted); font-size: .875rem; }
#site-footer strong { color: var(--navy); }
.foot-links { float: right; display: flex; gap: 14px; }
.foot-links a { color: var(--muted); }

/* 버튼·입력 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 42px; padding: 0 16px; border-radius: 6px; border: 1px solid var(--line); background: #fff; color: var(--ink); font: inherit; font-weight: 600; font-size: .95rem; cursor: pointer; text-decoration: none; white-space: nowrap; }
.btn:hover { border-color: #b9c2d3; }
.btn.primary { background: var(--navy); border-color: var(--navy); color: #fff; }
.btn.primary:hover { background: var(--navy-2); }
.btn.danger { color: var(--danger); border-color: #f0c4c0; }
.btn.ok { background: var(--ok); border-color: var(--ok); color: #fff; }
.btn.small { min-height: 34px; padding: 0 12px; font-size: .875rem; }
.btn.block { width: 100%; }
.btn:disabled { opacity: .55; cursor: default; }
:focus-visible { outline: 2px solid #5b84e0; outline-offset: 2px; }
label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 4px; color: var(--navy); }
label .opt { font-weight: 400; color: var(--muted); }
input, select, textarea { width: 100%; min-height: 42px; padding: 8px 12px; border: 1px solid #cdd4e0; border-radius: 6px; font: inherit; color: var(--ink); background: #fff; }
textarea { min-height: 96px; resize: vertical; line-height: 1.5; }
input[type=checkbox] { width: auto; min-height: 0; }
.field { margin-bottom: 14px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 14px; }
.hint { font-size: .82rem; color: var(--muted); margin-top: 4px; }

/* 블록 */
.panel { border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; background: #fff; }
.panel + .panel { margin-top: 16px; }
.panel > h2:first-child { margin-bottom: 14px; }
.notice { padding: 12px 14px; border-radius: 6px; background: var(--soft); border-left: 3px solid var(--navy-2); font-size: .93rem; }
.notice.warn { background: var(--warn-bg); border-color: #d99a1c; }
.notice.err { background: var(--danger-bg); border-color: var(--danger); }
.notice.ok { background: var(--ok-bg); border-color: var(--ok); }
.badge { display: inline-block; padding: 1px 8px; border-radius: 99px; font-size: .75rem; font-weight: 600; background: var(--soft); color: var(--muted); vertical-align: middle; white-space: nowrap; }
.badge.ok { background: var(--ok-bg); color: var(--ok); } .badge.warn { background: var(--warn-bg); color: var(--warn); }
.badge.err { background: var(--danger-bg); color: var(--danger); } .badge.navy { background: #e6ebf6; color: var(--navy-2); }
.empty { padding: 36px 20px; text-align: center; color: var(--muted); border: 1px dashed #cdd4e0; border-radius: var(--radius); }
#toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); background: var(--navy); color: #fff; padding: 10px 18px; border-radius: 6px; font-size: .92rem; opacity: 0; pointer-events: none; transition: opacity .15s, transform .15s; z-index: 50; max-width: 90vw; }
#toast.show { opacity: 1; transform: translate(-50%, 0); } #toast.err { background: var(--danger); }
table { width: 100%; border-collapse: collapse; font-size: .93rem; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: .8rem; color: var(--muted); font-weight: 600; white-space: nowrap; }
.table-scroll { overflow-x: auto; }
tr.click { cursor: pointer; } tr.click:hover { background: var(--soft); }

/* 공개 홈페이지 */
.hero { background: var(--navy); color: #fff; padding: 64px 0 60px; margin-top: -28px; }
.hero h1 { color: #fff; font-size: 2.1rem; margin-bottom: 12px; }
.hero p { color: #cfd7e8; max-width: 620px; font-size: 1.05rem; }
.hero .row { margin-top: 24px; }
.section { padding: 44px 0 0; }
.cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cols .panel h3 { margin-bottom: 6px; } .cols .panel + .panel { margin-top: 0; }
.page-head { padding: 12px 0 20px; border-bottom: 1px solid var(--line); margin-bottom: 24px; }
.page-head p { color: var(--muted); margin: 0; }
.lineup { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.lineup .panel { border-left: 3px solid var(--navy); } .lineup .panel + .panel { margin-top: 0; }
.lineup .tag { font-size: .78rem; color: var(--gold); font-weight: 600; letter-spacing: .08em; }
.narrow { max-width: 460px; margin: 0 auto; }
.tabs { display: flex; border-bottom: 1px solid var(--line); margin-bottom: 20px; }
.tabs button { flex: 1; background: none; border: 0; border-bottom: 2px solid transparent; padding: 10px; font: inherit; font-weight: 600; color: var(--muted); cursor: pointer; }
.tabs button[aria-selected=true] { color: var(--navy); border-color: var(--navy); }

/* 학습실 */
.course-item { display: grid; grid-template-columns: 1fr auto; gap: 8px 20px; align-items: center; }
.course-item h2 { margin: 0 0 4px; }
.meta { display: flex; flex-wrap: wrap; gap: 4px 16px; color: var(--muted); font-size: .9rem; }
.meta b { color: var(--ink); font-weight: 600; }
.lesson-list { list-style: none; margin: 0; padding: 0; }
.lesson-list li + li { border-top: 1px solid var(--line); }
.lesson-list a { display: grid; grid-template-columns: 52px 1fr auto; gap: 10px; align-items: center; padding: 12px 6px; text-decoration: none; color: var(--ink); }
.lesson-list a:hover { background: var(--soft); }
.lesson-list a[aria-current=true] { background: #e9eef8; box-shadow: inset 3px 0 0 var(--navy); }
.lesson-list .no { font-weight: 700; color: var(--navy); font-size: .9rem; }
.lesson-list .t { font-weight: 600; display: block; }
.lesson-list .d { color: var(--muted); font-size: .82rem; }
.done-mark { color: var(--ok); font-size: .8rem; font-weight: 600; white-space: nowrap; }
.watch { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 24px; align-items: start; }
.watch aside { position: sticky; top: 76px; max-height: calc(100vh - 96px); overflow: auto; border: 1px solid var(--line); border-radius: var(--radius); }
.watch aside h2 { font-size: .95rem; padding: 12px 14px; margin: 0; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: #fff; }
.watch aside .lesson-list a { grid-template-columns: 40px 1fr auto; padding: 10px 12px; font-size: .92rem; }
.player { position: relative; aspect-ratio: 16 / 9; background: #0c1326; border-radius: var(--radius); overflow: hidden; }
.player iframe, .player > div { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.player .perr { display: flex; flex-direction: column; align-items: center; justify-content: center; color: #fff; text-align: center; padding: 20px; gap: 8px; background: #0c1326; }
.player .perr a { color: #c9d6f5; }
.vtabs { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.vtabs button { border: 1px solid var(--line); background: #fff; border-radius: 99px; padding: 6px 14px; font: inherit; font-size: .88rem; cursor: pointer; }
.vtabs button[aria-pressed=true] { background: var(--navy); color: #fff; border-color: var(--navy); }
.lesson-head { margin: 18px 0 6px; }
.lesson-head h1 { font-size: 1.35rem; margin-bottom: 4px; }
dl.info { display: grid; grid-template-columns: 84px 1fr; gap: 8px 12px; margin: 0; }
dl.info dt { color: var(--muted); font-size: .88rem; font-weight: 600; } dl.info dd { margin: 0; }
.files { list-style: none; padding: 0; margin: 0; }
.files li + li { margin-top: 6px; }
.files button, .files a { display: flex; width: 100%; text-align: left; gap: 8px; align-items: center; padding: 10px 12px; border: 1px solid var(--line); border-radius: 6px; background: #fff; font: inherit; color: var(--ink); cursor: pointer; text-decoration: none; }
.files button:hover, .files a:hover { border-color: #b9c2d3; background: var(--soft); }
.files .k { font-size: .75rem; color: var(--muted); margin-left: auto; white-space: nowrap; }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.pager a { border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px; text-decoration: none; color: var(--ink); min-height: 58px; }
.pager a small { display: block; color: var(--muted); font-size: .78rem; } .pager a.next { text-align: right; }
.pager a:hover { background: var(--soft); }
.ann { border-top: 1px solid var(--line); padding: 12px 0; } .ann:first-of-type { border-top: 0; padding-top: 0; }
.ann summary { cursor: pointer; font-weight: 600; } .ann .body { margin-top: 8px; color: #333c4d; }

/* 관리자 */
.admin-tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 20px; overflow-x: auto; }
.admin-tabs a { padding: 10px 14px; text-decoration: none; color: var(--muted); font-weight: 600; white-space: nowrap; border-bottom: 2px solid transparent; }
.admin-tabs a[aria-current=page] { color: var(--navy); border-color: var(--navy); }
.chips { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.chips button { border: 1px solid var(--line); background: #fff; border-radius: 99px; padding: 5px 12px; font: inherit; font-size: .88rem; cursor: pointer; }
.chips button[aria-pressed=true] { background: var(--navy); color: #fff; border-color: var(--navy); }
details.panel > summary { cursor: pointer; font-weight: 700; color: var(--navy); }
details.panel[open] > summary { margin-bottom: 14px; }
.crumb { font-size: .88rem; margin-bottom: 10px; } .crumb a { color: var(--muted); }
.inline { display: flex; gap: 8px; flex-wrap: wrap; align-items: flex-end; }
.inline > div { flex: 1 1 140px; } .inline > .fit { flex: 0 0 auto; }
td input, td select { min-height: 36px; padding: 4px 8px; }
td .btn + .btn { margin-left: 4px; }
.steps { display: flex; gap: 6px; flex-wrap: wrap; font-size: .8rem; color: var(--muted); margin-bottom: 14px; }
.steps span::after { content: "→"; margin-left: 6px; color: #b9c2d3; } .steps span:last-child::after { content: ""; }
.savebar { position: sticky; bottom: 0; background: #fff; border-top: 1px solid var(--line); padding: 12px 0; display: flex; gap: 8px; flex-wrap: wrap; align-items: center; z-index: 5; }

@media (max-width: 960px) {
  .watch { grid-template-columns: 1fr; }
  .watch aside { position: static; max-height: none; }
  .cols { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  body { font-size: 15.5px; }
  .wrap { padding: 0 16px; }
  #site-header .bar { flex-wrap: wrap; gap: 0 12px; padding-top: 8px; }
  #site-header .nav { order: 3; width: calc(100% + 32px); margin: 6px -16px 0; padding: 0 8px; overflow-x: auto; border-top: 1px solid var(--line); }
  .hero { padding: 44px 0; } .hero h1 { font-size: 1.6rem; }
  .grid2, .grid3, .lineup { grid-template-columns: 1fr; }
  .course-item { grid-template-columns: 1fr; }
  .course-item .btn { width: 100%; }
  .watch .player { border-radius: 0; margin: 0 -16px; }
  .panel { padding: 16px; }
  .foot-links { float: none; margin-top: 8px; }
  dl.info { grid-template-columns: 72px 1fr; }
  .lesson-list a { grid-template-columns: 44px 1fr auto; }
}