* { box-sizing: border-box; margin: 0; padding: 0; }

/* TIGER EDU 브랜드: 주황 + 다크 그레이 */
:root {
  --bg: #f4f4f2;
  --card: #ffffff;
  --text: #2b2d30;
  --muted: #75797e;
  --primary: #ee7220;
  --primary-dark: #d35f10;
  --primary-soft: #fdeee2;
  --gray-deep: #4a4e53;
  --gray-deep2: #3d4145;
  --danger: #dc2626;
  --border: #e4e2de;
}

body {
  font-family: "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.container { max-width: 960px; margin: 0 auto; padding: 24px 16px; }

/* 상단바: 로고 느낌의 다크 그레이 + 주황 포인트 */
header.topbar {
  background: linear-gradient(180deg, var(--gray-deep) 0%, var(--gray-deep2) 100%);
  border-bottom: 3px solid var(--primary);
  padding: 12px 0;
}
header.topbar .container {
  display: flex; align-items: center; justify-content: space-between; padding: 0 16px;
}
.brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; }
.brand img { width: 40px; height: 40px; border-radius: 8px; display: block; }
.brand .brand-name { font-size: 17px; font-weight: 800; letter-spacing: 1px; color: var(--primary); }
.brand .brand-sub { font-size: 11px; color: #cfd2d6; letter-spacing: 2px; }
header.topbar h1 { font-size: 16px; color: #fff; font-weight: 600; }
header.topbar .user { font-size: 13px; color: #cfd2d6; display: flex; gap: 12px; align-items: center; }
header.topbar a { color: #cfd2d6; text-decoration: none; }
header.topbar a:hover { color: #fff; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}

h2 { font-size: 16px; margin-bottom: 14px; }
h2 .accent { color: var(--primary); }

label { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 4px; }
input, select, textarea {
  width: 100%; padding: 9px 10px; font-size: 14px;
  border: 1px solid var(--border); border-radius: 8px; background: #fff;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--primary-soft); border-color: var(--primary);
}
textarea { resize: vertical; min-height: 60px; }

button {
  padding: 10px 16px; font-size: 14px; font-weight: 600; border: none; border-radius: 8px;
  background: var(--primary); color: #fff; cursor: pointer; margin-top: 12px;
}
button:hover { background: var(--primary-dark); }
button:disabled { background: #b8bbbf; cursor: default; }
button.small { padding: 5px 10px; font-size: 12px; margin: 0; font-weight: 500; }
button.danger { background: var(--danger); }
button.ghost { background: transparent; color: #cfd2d6; border: 1px solid #6a6e73; }
button.ghost:hover { background: rgba(255,255,255,.08); color: #fff; }
button.ghost-dark { background: transparent; color: var(--muted); border: 1px solid var(--border); }
button.ghost-dark:hover { background: var(--primary-soft); color: var(--primary-dark); border-color: var(--primary); }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { color: var(--muted); font-weight: 600; font-size: 12px; }

.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.ready   { background: #e3f4e6; color: #1d7a34; }
.badge.queued  { background: #fdf3d7; color: #8a6410; }
.badge.encoding{ background: #e3ecfb; color: #2455b0; }
.badge.failed  { background: #fbe3e3; color: #a02020; }
.badge.cat     { background: var(--primary-soft); color: var(--primary-dark); }

.error { color: var(--danger); font-size: 13px; margin-top: 8px; min-height: 18px; }
.muted { color: var(--muted); font-size: 13px; }

/* 로그인 / 회원가입 */
.login-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; }
.login-card { width: 360px; padding: 28px 26px; }
.login-card .logo { display: block; width: 88px; height: 88px; border-radius: 16px; margin: 0 auto 14px; }
.login-card h1 { font-size: 22px; text-align: center; color: var(--primary); letter-spacing: 1px; }
.login-card .subtitle { text-align: center; color: var(--muted); font-size: 13px; margin: 4px 0 14px; letter-spacing: 1px; }
.login-card button { width: 100%; }
.login-card .alt {
  text-align: center; font-size: 13px; color: var(--muted);
  margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border);
}
.login-card .alt a { color: var(--primary); font-weight: 600; text-decoration: none; }

/* 과목 선택 카드 */
.subject-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.subject-card {
  display: flex; align-items: center; gap: 14px;
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 22px 20px; cursor: pointer;
  transition: transform .12s ease, border-color .12s, box-shadow .12s;
}
.subject-card:hover {
  transform: translateY(-2px); border-color: var(--primary);
  box-shadow: 0 6px 16px rgba(238, 114, 32, .15);
}
.subject-icon {
  width: 52px; height: 52px; border-radius: 12px; flex: none;
  background: var(--gray-deep); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; font-weight: 800;
}
.subject-name { font-size: 20px; font-weight: 800; color: var(--gray-deep); }
.subject-en { font-size: 11px; color: var(--muted); letter-spacing: 2px; }
.subject-count { margin-left: auto; font-size: 13px; color: var(--muted); }

/* 학년 카테고리 그리드 */
.cat-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px;
}
@media (max-width: 560px) { .cat-grid { grid-template-columns: repeat(2, 1fr); } }
.cat-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 26px 16px; text-align: center; cursor: pointer;
  transition: transform .12s ease, border-color .12s, box-shadow .12s;
}
.cat-card:hover {
  transform: translateY(-2px); border-color: var(--primary);
  box-shadow: 0 6px 16px rgba(238, 114, 32, .15);
}
.cat-card .cat-name { font-size: 22px; font-weight: 800; color: var(--gray-deep); }
.cat-card .cat-name span { color: var(--primary); }
.cat-card .cat-count { font-size: 13px; color: var(--muted); margin-top: 6px; }
.cat-card.empty { opacity: .5; }

/* 강의 목록 */
.list-head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.list-head h2 { margin: 0; font-size: 18px; }
.lecture-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 6px; border-bottom: 1px solid var(--border); cursor: pointer;
  border-radius: 8px;
}
.lecture-item:last-child { border-bottom: none; }
.lecture-item:hover { background: var(--primary-soft); }
.lecture-item .title { font-weight: 600; }
.lecture-item .meta { font-size: 13px; color: var(--muted); margin-top: 3px; }
.lecture-item .play {
  color: var(--primary); font-size: 18px; font-weight: 700; padding-right: 6px;
}

/* 플레이어 */
video { width: 100%; background: #000; border-radius: 12px; }
.speed-bar { display: flex; gap: 6px; align-items: center; margin-top: 10px; }
.speed-btn { background: #fff; color: var(--muted); border: 1px solid var(--border); }
.speed-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 탭 */
.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tabs button { margin: 0; background: #fff; color: var(--muted); border: 1px solid var(--border); font-weight: 500; }
.tabs button.active { background: var(--primary); color: #fff; border-color: var(--primary); font-weight: 700; }

progress { width: 100%; height: 10px; margin-top: 10px; accent-color: var(--primary); }

/* 랭킹 */
.rank-row {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 10px; border-bottom: 1px solid var(--border);
}
.rank-row:last-child { border-bottom: none; }
.rank-row.top { background: #fbf7f2; }
.rank-row.me { background: var(--primary-soft); border-radius: 8px; }
.rank-no {
  width: 40px; text-align: center; font-size: 16px; font-weight: 800; color: var(--gray-deep);
  flex: none;
}
.rank-row.top .rank-no { font-size: 24px; }
.rank-name { font-weight: 600; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.rank-time { text-align: right; flex: none; }
.rank-time .total { font-weight: 700; color: var(--primary-dark); }
.rank-time .week { font-size: 12px; color: var(--muted); margin-top: 2px; }

/* 폼 2단 배치 (과목/카테고리 등) */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* 넓은 표는 카드 안에서 가로 스크롤 (모바일 대응) */
.table-scroll, #lecture-list, #student-list { overflow-x: auto; -webkit-overflow-scrolling: touch; }
#lecture-list table { min-width: 940px; }
#student-list table { min-width: 420px; }
th { white-space: nowrap; }
#lecture-list td:first-child { min-width: 150px; word-break: keep-all; }
.badge { white-space: nowrap; }

/* ---------- 모바일 ---------- */
@media (max-width: 640px) {
  .container { padding: 14px 10px; }
  .card { padding: 16px 14px; border-radius: 10px; }

  header.topbar .container { flex-wrap: wrap; gap: 8px; }
  .brand img { width: 34px; height: 34px; }
  .brand .brand-name { font-size: 15px; }
  .brand .brand-sub { letter-spacing: 1px; }
  header.topbar .user { font-size: 12px; gap: 8px; }

  .subject-grid { grid-template-columns: 1fr; }
  .subject-card { padding: 16px; }
  .cat-grid { gap: 10px; }
  .cat-card { padding: 20px 10px; }
  .cat-card .cat-name { font-size: 19px; }

  .login-wrap { padding: 14px; align-items: flex-start; padding-top: 8vh; }
  .login-card { width: 100%; max-width: 360px; margin: 0 auto; }

  .list-head { flex-wrap: wrap; gap: 8px; }
  .list-head h2 { font-size: 16px; }
  .tabs { flex-wrap: wrap; }

  /* 터치 타깃 최소 높이 확보 */
  button { min-height: 40px; }
  button.small { min-height: 32px; }
  input, select, textarea { font-size: 16px; } /* iOS 자동 확대(줌) 방지 */
}