* { box-sizing: border-box; }
body { margin: 0; font-family: 'Pretendard', system-ui, -apple-system, sans-serif; color: #171c25; background: #f7f9fc; }
a { text-decoration: none; color: inherit; }
button { font: inherit; cursor: pointer; }
[hidden] { display: none !important; }
.trial-header { background: #fff; border-bottom: 1px solid #e0e7ef; }
.trial-header > div { max-width: 1160px; margin: auto; height: 80px; padding: 0 28px; display: flex; align-items: center; gap: 24px; }
.trial-header img { display: block; object-fit: contain; }
.header-label { padding-left: 24px; border-left: 1px solid #dde4ed; font-weight: 700; }
.trial-main { max-width: 1160px; margin: auto; padding: 36px 28px 64px; }
h1 { font-size: 28px; margin: 0 0 10px; letter-spacing: -.7px; }
.intro, .notice { color: #687a93; line-height: 1.6; }
.intro { margin: 0 0 28px; }
.type-switch { display: inline-flex; padding: 5px; background: #eaf0f8; border-radius: 12px; margin-bottom: 24px; }
.type-switch a { padding: 12px 36px; border-radius: 9px; color: #61748e; font-weight: 700; }
.type-switch a[aria-current] { background: #0866ed; color: white; box-shadow: 0 3px 8px #0c66e51a; }
.level-tabs { display: flex; gap: 32px; border-bottom: 1px solid #dde4ef; margin-bottom: 22px; }
.level-tabs button { border: 0; border-bottom: 2px solid transparent; background: none; padding: 16px 4px; color: #8799b1; font-weight: 700; }
.level-tabs button[aria-pressed=true] { color: #0065ff; border-bottom-color: #0065ff; }
.filter-row { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 18px; }
.filter-row button { border: 1px solid #e9eef5; border-radius: 24px; background: white; padding: 9px 22px; color: #61748e; }
.filter-row button[aria-pressed=true] { background: #0866ed; color: white; border-color: #0866ed; }
h2 { font-size: 21px; margin: 30px 0 8px; }
#course-count { font-size: 16px; color: #0866ed; margin-left: 5px; }
.notice { font-size: 14px; margin: 0 0 22px; }
.course-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 24px; }
.course-card { display: flex; flex-direction: column; background: white; border: 1px solid #dce5f1; border-radius: 16px; overflow: hidden; box-shadow: 0 2px 4px #132f5010; }
.course-body { padding: 26px; flex: 1; }
.course-badge { background: #edf4ff; color: #0866ed; padding: 5px 9px; border-radius: 4px; font-size: 12px; }
h3 { font-size: 20px; margin: 20px 0 24px; }
.chasi-label { color: #8799b1; font-size: 12px; margin: 0 0 7px; }
.chasi-title { font-size: 15px; line-height: 1.5; margin: 0; }
.course-meta { margin-top: 18px; display: flex; gap: 18px; color: #687a93; font-size: 13px; }
.course-footer { padding: 16px 26px; background: #f7f9fc; border-top: 1px solid #edf1f7; }
.course-footer a { display: block; text-align: center; background: #0866ed; color: #fff; border-radius: 10px; padding: 12px; font-weight: 700; }
.course-footer a:hover { background: #0056d6; }
.empty-state { text-align: center; padding: 48px 16px; color: #687a93; }
:focus-visible { outline: 3px solid #80b5ff; outline-offset: 3px; }
@media(max-width: 640px) { .trial-main { padding: 28px 18px; } .trial-header > div { padding: 0 18px; gap: 14px; } .header-label { padding-left: 14px; font-size: 14px; } .course-grid { grid-template-columns: 1fr; } h1 { font-size: 24px; } }