:root {
  color-scheme: light;
  --navy: #07192b;
  --navy-2: #0d2f52;
  --cyan: #2fa7b8;
  --cyan-soft: #e4f5f7;
  --gold: #f1b53d;
  --ink: #233548;
  --muted: #687d8f;
  --line: #ccdbe6;
  --white: #ffffff;
}
* { box-sizing: border-box; }
html, body { min-height: 100%; }
body { margin: 0; background: linear-gradient(180deg, #dfeaf3 0, #f6f9fb 58%, #eef4f8 100%); color: var(--ink); font-family: Arial, Helvetica, sans-serif; }
.catalog-header { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 28px; padding: 14px clamp(24px, 5vw, 76px); border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, 0.88); backdrop-filter: blur(12px); }
.brand { display: flex; align-items: center; gap: 13px; }
.brand-mark { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 11px; background: var(--navy-2); color: var(--white); font-size: 0.92rem; font-weight: 900; }
.brand p { margin: 0 0 3px; color: var(--muted); font-size: 0.67rem; font-weight: 800; letter-spacing: 0.09em; text-transform: uppercase; }
.brand strong { color: var(--navy); font-size: 1.02rem; }
.program-meta { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.program-meta span { padding: 7px 10px; border: 1px solid var(--line); border-radius: 999px; background: #f8fbfd; color: #536a7e; font-size: 0.7rem; font-weight: 700; }
.catalog-main { width: min(1440px, calc(100% - 48px)); margin: 0 auto; padding: 58px 0 68px; }
.catalog-intro { display: grid; grid-template-columns: minmax(0, 1fr) 370px; align-items: end; gap: 64px; margin-bottom: 36px; }
.eyebrow { margin: 0 0 13px; color: #16889b; font-size: 0.73rem; font-weight: 900; letter-spacing: 0.12em; text-transform: uppercase; }
h1 { max-width: 820px; margin: 0; color: var(--navy); font-size: clamp(2rem, 3.4vw, 3.25rem); line-height: 1.04; letter-spacing: -0.035em; }
.intro-copy { max-width: 740px; margin: 18px 0 0; color: #52697c; font-size: 1rem; line-height: 1.55; }
.overall-card { padding: 21px 22px; border: 1px solid var(--line); border-radius: 15px; background: rgba(255, 255, 255, 0.76); box-shadow: 0 14px 34px rgba(35, 53, 72, 0.08); }
.overall-copy { display: flex; align-items: center; justify-content: space-between; gap: 18px; color: var(--muted); font-size: 0.75rem; font-weight: 800; text-transform: uppercase; }
.overall-copy strong { color: var(--navy-2); font-size: 1.2rem; }
.overall-track, .card-progress { overflow: hidden; border-radius: 999px; background: #d7e3ec; }
.overall-track { height: 8px; margin: 12px 0 10px; }
.overall-fill, .card-progress div { width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #0d2f52 0%, #2d6cdf 48%, #a6f4ff 100%); transition: width 240ms ease; }
.overall-card small { color: #75899a; font-size: 0.68rem; }
.course-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.course-card { min-height: 286px; display: flex; flex-direction: column; padding: 24px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255, 255, 255, 0.91); color: inherit; text-decoration: none; box-shadow: 0 12px 30px rgba(35, 53, 72, 0.07); }
.course-card.is-active { border-color: #5aaeba; background-image: linear-gradient(100deg, rgba(7, 25, 43, 0.94) 0%, rgba(8, 36, 65, 0.86) 49%, rgba(7, 25, 43, 0.58) 100%), url("visuals-webp/scene-01-background.webp"); background-position: center; background-size: cover; box-shadow: 0 18px 42px rgba(13, 47, 82, 0.22); transition: transform 160ms ease, box-shadow 160ms ease; }
#testingCard.is-active { background-image: linear-gradient(100deg, rgba(7, 25, 43, 0.94) 0%, rgba(8, 36, 65, 0.86) 49%, rgba(7, 25, 43, 0.58) 100%), url("course-2/visuals-webp/course2-cover-software-testing-foundations-v2.webp"); }
#engineeringCard.is-active { background-image: linear-gradient(100deg, rgba(7, 25, 43, 0.94) 0%, rgba(8, 36, 65, 0.86) 49%, rgba(7, 25, 43, 0.58) 100%), url("course-3/visuals-webp/course3-scene-01.webp"); }
#reliabilityCard.is-active { background-image: linear-gradient(100deg, rgba(7, 25, 43, 0.94) 0%, rgba(8, 36, 65, 0.86) 49%, rgba(7, 25, 43, 0.58) 100%), url("course-4/visuals-webp/course4-cover-reliable-design.webp"); }
#qualityCard.is-active { background-image: linear-gradient(100deg, rgba(7, 25, 43, 0.94) 0%, rgba(8, 36, 65, 0.86) 49%, rgba(7, 25, 43, 0.58) 100%), url("course-5/visuals-webp/course5-cover-metrics.webp"); }
#advancedCard.is-active { background-image: linear-gradient(100deg, rgba(7, 25, 43, 0.94) 0%, rgba(8, 36, 65, 0.86) 49%, rgba(7, 25, 43, 0.58) 100%), url("course-6/visuals-webp/course6-cover-ai-quality.webp"); }
.course-card.is-active .course-icon { border: 1px solid rgba(255, 255, 255, 0.22); background: rgba(228, 245, 247, 0.16); color: #dffbff; backdrop-filter: blur(5px); }
.course-card.is-active h2 { color: var(--white); }
.course-card.is-active p, .course-card.is-active .card-progress-copy { color: #d7e5ef; }
.course-card.is-active .card-progress { background: rgba(255, 255, 255, 0.24); }
.course-card.is-active .course-action { color: var(--white); }
.course-card.is-active:hover { transform: translateY(-3px); box-shadow: 0 22px 50px rgba(13, 47, 82, 0.17); }
.course-card.is-locked { background: rgba(247, 250, 252, 0.76); }
.course-card-top { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.course-icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 12px; background: var(--cyan-soft); color: var(--navy-2); }
.course-icon svg { width: 25px; height: 25px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.course-status { padding: 6px 9px; border-radius: 999px; background: #e9eff4; color: #708397; font-size: 0.65rem; font-weight: 900; letter-spacing: 0.05em; text-transform: uppercase; }
.course-status.is-progress { background: #fff0cf; color: #835a08; }
.course-status.is-complete { background: #dff5ea; color: #176b47; }
.course-card h2 { margin: 22px 0 10px; color: var(--navy); font-size: 1.14rem; line-height: 1.25; }
.course-card p { margin: 0; color: #607487; font-size: 0.82rem; line-height: 1.48; }
.card-progress-copy { display: flex; justify-content: space-between; gap: 12px; margin-top: auto; padding-top: 22px; color: #657a8e; font-size: 0.7rem; font-weight: 700; }
.card-progress { height: 6px; margin-top: 8px; }
.course-action, .locked-action { margin-top: 18px; font-size: 0.76rem; font-weight: 900; letter-spacing: 0.04em; text-transform: uppercase; }
.course-action { color: var(--navy-2); }
.course-action span { display: inline-block; margin-left: 6px; transition: transform 150ms ease; }
.course-card.is-active:hover .course-action span { transform: translateX(4px); }
.locked-action { display: flex; align-items: center; gap: 9px; margin-top: auto; padding-top: 24px; color: #7c8f9f; }
.lock { position: relative; width: 13px; height: 11px; border-radius: 2px; background: #8fa2b1; }
.lock::before { content: ""; position: absolute; left: 2px; top: -7px; width: 7px; height: 8px; border: 2px solid #8fa2b1; border-bottom: 0; border-radius: 7px 7px 0 0; }
@media (max-width: 1050px) { .catalog-intro { grid-template-columns: 1fr; gap: 24px; } .overall-card { max-width: 540px; } .course-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 680px) { .catalog-header { align-items: flex-start; flex-direction: column; padding-inline: 20px; } .program-meta { justify-content: flex-start; } .catalog-main { width: min(100% - 28px, 1440px); padding-top: 36px; } .course-grid { grid-template-columns: 1fr; } .course-card { min-height: 260px; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition-duration: 0.01ms !important; } }