/* ============================================================================
   SV Learning — shared design system
   The single source of truth for brand tokens + core components. Link this on
   every page, then add page-specific styles on top.
   Brand: green #43B02A seal logo. Page palette is vibrant multi-colour; green is
   the "go / free" colour, NOT the whole site.
   ============================================================================ */

:root {
  /* text + surfaces (light) — clean, calm off-white ground (not beige), easy on the eyes */
  --ink:#26324C; --ink-soft:#66748C;
  --cream:#F5F8F6; --card:#FFFFFF; --surface-2:#ECF3EF; --line:#E4ECE7;

  /* brand + accents */
  --green:#43B02A; --green-d:#34901F;   /* brand · CTAs · free/correct */
  --sky:#17BECF;   --sky-d:#0E97A6;     /* play · secondary */
  --sun:#FFB400;   --sun-d:#E29400;     /* XP · coins · energy */
  --coral:#FF5C7A; --coral-d:#E63E5E;   /* fun accent */
  --grape:#7B61FF; --grape-d:#6247E6;   /* playful */
  --navy:#20304F;                        /* grounding dark (parent/footer) */

  /* semantic */
  --danger:#E5484D; --warning:var(--sun); --success:var(--green);

  --shadow:0 12px 30px rgba(38,50,76,.12); --shadow-sm:0 4px 14px rgba(38,50,76,.09);
  --r-lg:26px; --r-md:16px; --r-sm:10px;

  --display:"Nunito", ui-rounded, system-ui, sans-serif;   /* headings — heavy weights */
  --body:"Nunito", system-ui, -apple-system, "Segoe UI", sans-serif;
  --maxw:1140px;
}
@media (prefers-color-scheme: dark){ :root{
  --ink:#EEF1F8; --ink-soft:#A4AEC6; --cream:#141A2A; --card:#1D2740; --surface-2:#1A2236; --line:#2C3550;
  --shadow:0 14px 34px rgba(0,0,0,.5); --shadow-sm:0 4px 16px rgba(0,0,0,.4);
}}
:root[data-theme="light"]{ --ink:#26324C; --ink-soft:#66748C; --cream:#F5F8F6; --card:#FFFFFF; --surface-2:#ECF3EF; --line:#E4ECE7; --shadow:0 12px 30px rgba(38,50,76,.12); --shadow-sm:0 4px 14px rgba(38,50,76,.09); }
:root[data-theme="dark"]{ --ink:#EEF1F8; --ink-soft:#A4AEC6; --cream:#141A2A; --card:#1D2740; --surface-2:#1A2236; --line:#2C3550; --shadow:0 14px 34px rgba(0,0,0,.5); --shadow-sm:0 4px 16px rgba(0,0,0,.4); }

*,*::before,*::after{ box-sizing:border-box; }
body{ margin:0; background:var(--cream); color:var(--ink); font-family:var(--body); font-size:17px; line-height:1.65; -webkit-font-smoothing:antialiased; }
h1,h2,h3,h4{ font-family:var(--display); font-weight:800; line-height:1.08; margin:0; letter-spacing:-.01em; text-wrap:balance; }
a{ color:inherit; }
.eyebrow{ font-size:13px; font-weight:800; letter-spacing:.13em; text-transform:uppercase; color:var(--sky-d); }
.wrap{ max-width:var(--maxw); margin:0 auto; padding:0 24px; }

/* buttons — tactile, with depth */
.btn{ font-family:var(--display); font-weight:700; font-size:17px; border:none; cursor:pointer; border-radius:14px; padding:15px 28px; text-decoration:none; display:inline-flex; align-items:center; justify-content:center; gap:9px; transition:transform .08s ease, box-shadow .08s ease, background .15s; }
.btn-primary{ background:var(--green); color:#fff; box-shadow:0 5px 0 var(--green-d); }
.btn-primary:hover{ transform:translateY(-1px); box-shadow:0 6px 0 var(--green-d); background:#49bd2e; }
.btn-primary:active{ transform:translateY(4px); box-shadow:0 1px 0 var(--green-d); }
.btn-ghost{ background:transparent; color:var(--ink); box-shadow:inset 0 0 0 2.5px var(--line); }
.btn-ghost:hover{ box-shadow:inset 0 0 0 2.5px var(--sky); color:var(--sky-d); }
.btn:focus-visible, a:focus-visible, button:focus-visible{ outline:3px solid var(--sky); outline-offset:3px; }

.badge{ display:inline-flex; align-items:center; gap:8px; background:color-mix(in srgb,var(--green) 15%,var(--card)); color:var(--green-d); font-weight:800; font-size:13.5px; padding:7px 15px; border-radius:999px; }

@media (prefers-reduced-motion: reduce){ *{ animation:none !important; transition:none !important; scroll-behavior:auto !important; } }

/* ============================================================================
   SITE NAV — one shared, role-aware, accessible top navigation.
   Rendered by shared/site-nav.js into <header id="site-nav">. Replaces the
   copy-pasted inline navs across the app.
   ============================================================================ */
.site-nav{ position:sticky; top:0; z-index:60; background:color-mix(in srgb,var(--cream) 90%,transparent); backdrop-filter:blur(10px); border-bottom:1px solid var(--line); }
.site-nav .sn-in{ max-width:1320px; margin:0 auto; padding:0 22px; height:66px; display:flex; align-items:center; gap:14px; }
.sn-logo{ display:flex; align-items:center; flex-shrink:0; }
.sn-logo img{ height:42px; width:auto; display:block; }
.sn-logo .sn-logo-white{ display:none; }
/* reset in case a page ships a leftover element-level `nav {}` rule that would style the inner <nav class="sn-links"> */
.site-nav nav.sn-links{ padding:0; background:transparent; border:none; box-shadow:none; }
.sn-links{ display:flex; align-items:center; gap:2px; margin-left:6px; min-width:0; }
.sn-spacer{ flex:1; }
.sn-link{ text-decoration:none; color:var(--ink-soft); font-weight:700; font-size:15px; padding:8px 12px; border-radius:9px; white-space:nowrap; }
.sn-link:hover{ color:var(--ink); background:color-mix(in srgb,var(--ink) 5%,transparent); }
.sn-link.active{ color:var(--green-d); background:color-mix(in srgb,var(--green) 12%,transparent); }

.sn-dd{ position:relative; }
.sn-dd-toggle{ background:none; border:none; font-family:var(--body); color:var(--ink-soft); font-weight:700; font-size:15px; padding:8px 12px; border-radius:9px; cursor:pointer; display:inline-flex; align-items:center; gap:6px; white-space:nowrap; }
.sn-dd-toggle:hover{ color:var(--ink); background:color-mix(in srgb,var(--ink) 5%,transparent); }
.sn-dd-toggle.active{ color:var(--green-d); }
.sn-dd-toggle .sn-caret{ font-size:10px; transition:transform .15s; }
.sn-dd[aria-open="true"] .sn-caret{ transform:rotate(180deg); }
.sn-dd-menu{ position:absolute; top:calc(100% + 6px); right:0; min-width:210px; background:var(--card); border:1px solid var(--line); border-radius:var(--r-md); box-shadow:var(--shadow); padding:6px; display:none; }
.sn-dd[aria-open="true"] .sn-dd-menu{ display:block; }
.sn-dd-menu a{ display:block; text-decoration:none; color:var(--ink); font-weight:600; font-size:14.5px; padding:9px 12px; border-radius:8px; }
.sn-dd-menu a:hover, .sn-dd-menu a:focus-visible{ background:color-mix(in srgb,var(--green) 12%,transparent); color:var(--green-d); outline:none; }
.sn-dd-menu a.active{ color:var(--green-d); font-weight:800; }

.sn-right{ display:flex; align-items:center; gap:12px; flex-shrink:0; }
.sn-email{ color:var(--ink-soft); font-size:13.5px; font-weight:700; max-width:180px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.sn-logout{ background:transparent; border:2px solid var(--line); color:var(--ink); font-family:var(--display); font-weight:800; font-size:13.5px; padding:8px 14px; border-radius:10px; cursor:pointer; }
.sn-logout:hover{ border-color:var(--coral); color:var(--coral-d); }
.sn-theme{ background:var(--card); border:1px solid var(--line); border-radius:9px; width:36px; height:36px; cursor:pointer; font-size:15px; color:var(--ink); flex-shrink:0; }

.sn-burger{ display:none; background:none; border:none; cursor:pointer; padding:8px; flex-direction:column; gap:5px; margin-left:auto; }
.sn-burger span{ display:block; width:24px; height:2.5px; background:var(--ink); border-radius:2px; transition:transform .2s, opacity .2s; }
.sn-mobile{ position:fixed; inset:0; z-index:70; background:var(--cream); display:none; flex-direction:column; padding:20px 24px; overflow-y:auto; }
.sn-mobile.open{ display:flex; }
.sn-mobile-top{ display:flex; align-items:center; justify-content:space-between; height:46px; margin-bottom:18px; }
.sn-mobile-close{ background:none; border:none; font-size:28px; cursor:pointer; color:var(--ink-soft); line-height:1; }
.sn-mobile a, .sn-mobile .sn-m-group > span{ display:block; text-decoration:none; color:var(--ink); font-family:var(--display); font-weight:800; font-size:20px; padding:12px 0; border-bottom:1px solid var(--line); }
.sn-mobile .sn-m-group span{ color:var(--ink-soft); font-size:13px; text-transform:uppercase; letter-spacing:.08em; padding:16px 0 6px; border:none; }
.sn-mobile .sn-m-sub{ font-size:16px !important; font-weight:700 !important; padding-left:14px !important; }
.sn-mobile .sn-logout{ margin-top:18px; align-self:flex-start; font-size:16px; }

.site-nav :focus-visible, .sn-mobile :focus-visible{ outline:3px solid var(--sky); outline-offset:2px; }
:root[data-theme="dark"] .sn-logo .sn-logo-dark{ display:none; } :root[data-theme="dark"] .sn-logo .sn-logo-white{ display:block; }
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .sn-logo .sn-logo-dark{ display:none; } :root:not([data-theme="light"]) .sn-logo .sn-logo-white{ display:block; } }

@media (max-width:900px){
  .site-nav .sn-links, .site-nav .sn-right .sn-email, .site-nav .sn-right .sn-logout, .site-nav .sn-right .sn-theme{ display:none; }
  .sn-burger{ display:flex; }
}