:root {
    --ink: #12203a;
    --muted: #5b6780;
    --paper: #f6f8fc;
    --white: #ffffff;
    --line: #dde3ee;
    --brand: #2547d0;
    --brand-dark: #1b36a3;
    --radius: 14px;
    --max: 1160px;
    --head: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
    --body: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
    margin: 0;
    font-family: var(--body);
    font-size: 17px;
    line-height: 1.6;
    color: var(--ink);
    background: var(--paper);
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--brand); outline-offset: 3px; border-radius: 6px; }

h1, h2, h3, h4 { font-family: var(--head); line-height: 1.15; margin: 0; }

/* ---------- Navbar ---------- */
.navbar {
    position: sticky; top: 0; z-index: 50;
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px max(20px, calc((100vw - var(--max)) / 2));
    background: rgba(246, 248, 252, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}
.logo {
    display: flex; align-items: center; gap: 10px;
    color: var(--brand); text-decoration: none;
    font: 800 20px var(--head);
}
.logo span { color: var(--ink); }
.nav-links { display: flex; align-items: center; gap: 28px; list-style: none; margin: 0; padding: 0; }
.nav-links a { text-decoration: none; font-weight: 600; color: var(--muted); transition: color .15s; }
.nav-links a:hover { color: var(--ink); }
.nav-links .nav-cta {
    color: #fff; background: var(--brand);
    padding: 8px 18px; border-radius: 999px;
}
.nav-links .nav-cta:hover { background: var(--brand-dark); color: #fff; }

/* ---------- Hero ---------- */
.hero {
    display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center;
    max-width: var(--max); margin: 0 auto;
    padding: 80px 20px 72px;
}
.hero h2 {
    font-size: clamp(2.2rem, 4.6vw, 3.7rem);
    font-weight: 800; letter-spacing: -0.03em;
}
.hero-sub { margin: 20px 0 0; font-size: 1.2rem; color: var(--muted); max-width: 52ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-contact { margin: 18px 0 0; color: var(--muted); }
.hero-contact a { color: var(--ink); font-weight: 600; }

.btn {
    display: inline-block; text-decoration: none; font-weight: 600;
    padding: 13px 26px; border-radius: 999px; border: 2px solid transparent;
    transition: background .15s, border-color .15s;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-ghost { border-color: var(--ink); color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: #fff; }

/* Timetable preview (the one memorable element) */
.tt {
    display: grid; grid-template-columns: 34px repeat(5, 1fr); gap: 6px;
    padding: 18px; background: var(--white);
    border: 1px solid var(--line); border-radius: 20px;
    box-shadow: 0 24px 60px -24px rgba(18, 32, 58, .25);
}
.tt-head, .tt-period {
    font: 600 12px var(--head); color: var(--muted);
    display: flex; align-items: center; justify-content: center;
}
.tt-cell {
    min-height: 58px; padding: 6px; border-radius: 8px;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    font: 600 12px/1.2 var(--head); text-align: center;
}
.s1 { background: #d9e3ff; color: #1e3a9f; }
.s2 { background: #fde9c4; color: #7a4a00; }
.s3 { background: #d3f0e4; color: #0b5d41; }
.s4 { background: #fbdcdf; color: #8a1f31; }
.s5 { background: #e6dcf8; color: #4b2a8a; }
.tt-relief { background: var(--white); border: 2px dashed var(--brand); color: var(--brand); }
.tt-relief small { font-weight: 400; opacity: .85; }

/* ---------- Sections ---------- */
.features, .video-section, .clients {
    max-width: var(--max); margin: 0 auto; padding: 72px 20px;
}
.section-title {
    font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 800;
    letter-spacing: -0.02em; margin-bottom: 40px;
}
.empty { color: var(--muted); padding: 32px; border: 1px dashed var(--line); border-radius: var(--radius); text-align: center; }

/* Features */
.feature-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line);
}
.feature {
    padding: 32px 28px;
    border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.feature svg {
    width: 28px; height: 28px; margin-bottom: 16px;
    fill: none; stroke: var(--brand); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}
.feature h3 { font-size: 1.2rem; margin-bottom: 8px; }
.feature p { margin: 0; color: var(--muted); }

/* Videos */
.video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 28px 22px; }
.video-card { text-decoration: none; display: block; }
.video-thumbnail {
    position: relative; aspect-ratio: 16 / 9; overflow: hidden;
    border-radius: var(--radius); background: #dfe5f1;
}
.video-thumbnail img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.video-card:hover .video-thumbnail img { transform: scale(1.04); }
.thumb-placeholder { width: 100%; height: 100%; background: linear-gradient(135deg, #d9e3ff, #e6dcf8); }
.play-overlay {
    position: absolute; right: 12px; bottom: 12px;
    width: 42px; height: 42px; border-radius: 50%;
    display: grid; place-items: center;
    background: rgba(18, 32, 58, .85);
}
.play-overlay svg { width: 20px; height: 20px; fill: #fff; }
.video-info { padding: 12px 2px 0; }
.video-title { font: 600 1.05rem/1.3 var(--head); }
.video-card:hover .video-title { color: var(--brand); }
.video-meta { font-size: .9rem; color: var(--muted); margin-top: 4px; }

/* Clients */
.client-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 18px; }
.client-card {
    display: flex; flex-direction: column; align-items: center; gap: 14px; text-align: center;
    padding: 28px 18px; text-decoration: none;
    background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
    transition: border-color .15s;
}
.client-card:hover { border-color: var(--brand); }
.client-logo { width: 84px; height: 84px; display: grid; place-items: center; }
.client-logo img { max-height: 84px; width: auto; object-fit: contain; }
.client-logo-text {
    width: 84px; height: 84px; border-radius: 50%;
    display: grid; place-items: center;
    font: 800 24px var(--head); color: var(--brand); background: #e8edff;
}
.client-card h4 { font-size: 1rem; font-weight: 600; }

/* ---------- Footer ---------- */
.footer { background: var(--ink); color: #c9d2e6; padding: 56px 20px 32px; margin-top: 40px; }
.footer-content { max-width: var(--max); margin: 0 auto; }
.company-name { font: 800 1.6rem var(--head); color: #fff; margin-bottom: 6px; }
.footer p { margin: 0 0 16px; }
.footer-contact { list-style: none; margin: 0 0 28px; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 28px; }
.footer a { color: #fff; }
.copyright { font-size: .9rem; padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, .15); }
.admin-link { margin-left: 12px; opacity: .6; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .hero { grid-template-columns: 1fr; gap: 40px; padding-top: 48px; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .nav-links { gap: 14px; font-size: 15px; }
    .nav-links li:nth-child(2) { display: none; }
    .feature-grid { grid-template-columns: 1fr; }
    .tt { padding: 10px; gap: 4px; grid-template-columns: 26px repeat(5, 1fr); }
    .tt-cell { min-height: 46px; font-size: 10px; padding: 3px; }
    .features, .video-section, .clients { padding: 52px 20px; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { transition: none !important; }
}