/* FreshLens Learn: the landing page header and footer, shared with the Courses pages. */
:root{
  --paper:#E4ECF8;--surface:#FFFFFF;--ink:#1E2A3E;--muted:#5A6B84;--navy:#1B47B8;--navy-deep:#123077;
  --line:#C9D8EA;--line-soft:#D9E4F2;--tint:#E3EBFA;--tint2:#D2DFF6;--on-navy:#FFFFFF;
  --free-ink:#1B6B4A;--free-bg:#E2F3EA;--soft:#F5F8FE;--gold:#F0B429;--gold-ink:#7A4F00;--gold-bg:#FDF1D8;
  --shadow:0 18px 44px rgba(18,48,119,.14);--radius:18px;
}
*{box-sizing:border-box}
a{color:var(--navy);text-decoration:none}
.wrap{width:min(1200px,100% - 32px);margin:0 auto}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 22px;border-radius:12px;font:inherit;font-weight:700;font-size:16px;cursor:pointer;border:1px solid transparent;transition:transform .2s,box-shadow .2s,background .2s}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--navy);color:var(--on-navy);box-shadow:none}
.btn-primary:hover{box-shadow:none;filter:brightness(.92)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-sm{min-height:44px;padding:0 16px;font-size:14px;border-radius:10px}
/* Header */
.header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--surface) 82%,transparent);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}
.header .wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;font-size:18px}
.brand img{width:44px;height:44px;border-radius:50%}
.brand-txt{display:flex;flex-direction:column;line-height:1.1;gap:1px}
.brand-name{font-size:20px;font-weight:700;color:var(--ink)}
.brand-learn{font-size:16px;font-weight:800;color:var(--navy)}
.brand-sub{font-size:10px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:1.2px}
.nav{display:flex;align-items:center;gap:26px;font-weight:600;font-size:15px}
.nav a{color:var(--ink);position:relative}
.nav a::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;background:var(--navy);transform:scaleX(0);transition:transform .25s}
.nav a:hover::after{transform:scaleX(1)}
.head-actions{display:flex;gap:8px;align-items:center}
.icon-btn{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:var(--surface);color:var(--ink);display:inline-flex;align-items:center;justify-content:center;cursor:pointer}
@media (max-width:900px){.nav-l,.hide-sm{display:none}.nav{gap:0}}
footer{margin-top:72px;border-top:1px solid var(--line);background:var(--surface)}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:26px 0;font-size:14px;color:var(--muted)}
footer a{color:var(--muted)}
.navdd{position:relative}
.navdd summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:6px;min-height:40px;color:var(--ink)}
.navdd summary::-webkit-details-marker{display:none}
.navdd summary::after{content:"";width:7px;height:7px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg);margin-top:-4px;transition:transform .2s}
.navdd[open] summary::after{transform:rotate(-135deg);margin-top:3px}
.navdd-panel{position:absolute;left:-12px;top:calc(100% + 10px);width:320px;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:0 18px 40px rgba(14,25,48,.16);padding:8px;display:flex;flex-direction:column;z-index:60}
.navdd-panel a{display:flex;flex-direction:column;gap:2px;padding:10px 12px;border-radius:10px;color:var(--ink)}
.navdd-panel a::after{display:none}
.navdd-panel a:hover{background:var(--tint)}
.navdd-panel b{font-size:14.5px}
.navdd-panel span{font-size:12.5px;font-weight:500;color:var(--muted)}
@media (max-width:900px){.navdd summary{font-size:14px;font-weight:700;padding:0 12px;border:1px solid var(--line);border-radius:10px;background:var(--surface)}.navdd-panel{position:fixed;left:12px;right:12px;top:72px;width:auto}}
@media (max-width:480px){.header .wrap{gap:8px}.brand{gap:8px}.brand img{width:36px;height:36px}.brand-name{font-size:17px}.brand-learn{font-size:14px}.navdd summary{padding:0 10px;font-size:13.5px}.head-actions{gap:6px}.head-actions .icon-btn{width:40px;height:40px}.head-actions .btn-sm{padding:0 12px}}
.nav .nav-cta{display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:0 8px 0 14px;border-radius:999px;background:var(--tint);border:1px solid var(--tint2);color:var(--navy);font-weight:700;transition:background .2s,border-color .2s}
.nav .nav-cta:hover{background:var(--tint2);border-color:var(--navy)}
.nav .nav-cta::after{display:none}
.nav-cta em{font-style:normal;font-size:11px;font-weight:800;background:var(--gold);color:#1E2A3E;padding:3px 8px;border-radius:999px}
@media (max-width:900px){.nav .nav-cta{display:none}}