:root{--bg:#0c1117;--panel:#141c25;--panel2:#1b2632;--text:#edf3f7;--muted:#9fb0bf;--accent:#62d394;--line:#2a3947;--warn:#ffd166}*{box-sizing:border-box}body{margin:0;background:linear-gradient(180deg,#081016,#101820);color:var(--text);font:16px/1.55 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--accent);text-decoration:none}nav{position:sticky;top:0;z-index:1000;display:flex;justify-content:space-between;align-items:center;padding:14px max(4vw,22px);background:#091016ee;border-bottom:1px solid var(--line);backdrop-filter:blur(9px)}nav div{display:flex;gap:18px;align-items:center}.brand{font-weight:800;letter-spacing:.12em;color:#fff}main{width:min(1180px,92vw);margin:34px auto 70px}footer{border-top:1px solid var(--line);padding:24px 4vw;color:var(--muted);text-align:center}.hero{padding:8vh 0 6vh;max-width:900px}.hero h1{font-size:clamp(42px,8vw,84px);line-height:.96;margin:.2em 0}.hero p,.lead{font-size:1.18rem;color:#c7d5df}.eyebrow,.tag{color:var(--accent);font-weight:800;letter-spacing:.12em;font-size:.78rem}.grid{display:grid;gap:18px}.grid.three{grid-template-columns:repeat(3,1fr)}article,.panel{background:linear-gradient(145deg,var(--panel),var(--panel2));border:1px solid var(--line);border-radius:18px;padding:22px}.actions{display:flex;gap:12px;margin-top:28px}.btn,button{display:inline-block;border:0;border-radius:10px;background:var(--accent);color:#07110b;font-weight:800;padding:11px 16px;cursor:pointer}.secondary{background:transparent;color:var(--text);border:1px solid var(--line)}.narrow{max-width:520px;margin:8vh auto}.panel form label{display:block;margin:14px 0}.panel input{width:100%;padding:12px;margin-top:6px;background:#0d151c;border:1px solid var(--line);border-radius:8px;color:#fff}.flash{background:#342a16;border:1px solid #715c24;padding:12px 16px;border-radius:10px;margin-bottom:18px}.muted,small{color:var(--muted)}.metric{display:block;font-size:2rem;font-weight:900}.lesson-list{display:grid;gap:12px}.lesson-card{display:flex;justify-content:space-between;gap:24px;padding:20px;background:var(--panel);border:1px solid var(--line);border-radius:15px;color:var(--text)}.lesson-card h3{margin:.25em 0}.lesson-card p{margin:0;color:var(--muted)}.score{font-size:1.6rem;font-weight:900;color:var(--accent);align-self:center}.lesson{max-width:900px}.source{margin-top:25px;padding:15px;background:#0d151c;border-left:4px solid var(--accent)}fieldset{border:1px solid var(--line);border-radius:12px;margin:18px 0;padding:16px}legend{font-weight:800;padding:0 8px}.choice{display:block!important;padding:8px 10px;margin:5px 0!important;background:#0f171f;border-radius:8px}.choice input{width:auto;margin:0 8px 0 0}.result{margin-top:20px;border:1px solid var(--accent);border-radius:12px;padding:16px}.map-head,.admin-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:18px}.layer-buttons{display:flex;flex-wrap:wrap;gap:8px}.layer-buttons button{background:#18232d;color:#fff;border:1px solid var(--line)}#map{height:68vh;min-height:520px;border:1px solid var(--line);border-radius:18px;overflow:hidden}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;background:var(--panel);border-radius:14px;overflow:hidden}th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line)}th{color:var(--muted);font-size:.8rem;text-transform:uppercase}.source-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.source-grid article p{margin:.4em 0}@media(max-width:800px){.grid.three,.source-grid{grid-template-columns:1fr}.map-head,.admin-head,.lesson-card{display:block}.score{margin-top:10px}nav{align-items:flex-start;gap:10px}nav div{gap:10px;flex-wrap:wrap;justify-content:flex-end}}

.atlas-actions{display:flex;gap:10px}.atlas-shell{display:grid;grid-template-columns:310px 1fr;gap:16px;align-items:stretch}.atlas-sidebar{display:flex;flex-direction:column;gap:12px}.atlas-sidebar section{background:linear-gradient(145deg,var(--panel),var(--panel2));border:1px solid var(--line);border-radius:16px;padding:16px}.atlas-shell #map{height:76vh;min-height:650px}.layer-stack{display:grid;gap:7px;margin-top:10px}.layer-toggle{display:flex;gap:9px;align-items:center;text-align:left;background:#0f171f;color:var(--muted);border:1px solid var(--line);padding:9px 11px}.layer-toggle.active{color:#fff;border-color:#54715f;background:#17231d}.feature-card h3,.challenge-panel h3{margin:.4em 0}.why-box{padding:10px 12px;background:#0d151c;border-left:3px solid var(--accent);border-radius:6px}.why-box p{margin:.25em 0 0}.legend{display:grid;gap:7px;color:var(--muted);font-size:.88rem}.legend i{display:inline-block;margin-right:8px;vertical-align:middle}.legend-box{width:18px;height:12px;border:1px solid #9cbc7a;background:#7c9a6544}.legend-line{width:22px;height:0;border-top:4px solid}.legend-line.water{border-color:#46a7dc}.legend-line.road{border-color:#f1c75b}.legend-line.rail{border-color:#f1c75b;border-top-style:dashed}.legend-dot{width:12px;height:12px;border-radius:50%;background:#e57c73}.mountain-icon{color:#c29b6c;font-size:24px;font-weight:900;text-shadow:0 1px 2px #000}.game-stat-row{display:flex;justify-content:space-between;margin:8px 0;color:var(--accent)}.game-good,.game-bad{padding:10px;border-radius:8px;margin:12px 0}.game-good{background:#123522;border:1px solid #2e7b51}.game-bad{background:#3a1d1b;border:1px solid #8e4740}.map-note{font-size:.85rem}.leaflet-tooltip{background:#0d151cf2;color:#fff;border:1px solid #354555;box-shadow:none}.leaflet-tooltip:before{display:none}@media(max-width:900px){.atlas-shell{grid-template-columns:1fr}.atlas-sidebar{order:2}.atlas-shell #map{height:62vh;min-height:500px}.atlas-actions{flex-wrap:wrap}}
.module-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1rem;margin:1rem 0 2rem}.module-card{display:block;padding:1.25rem;border:1px solid #34425a;border-radius:14px;background:#131a26;text-decoration:none}.module-card:hover{transform:translateY(-2px)}.essential,.objectives,.worked{padding:1rem;margin:1rem 0;border-left:4px solid #7aa2f7;background:#101722}.worked{border-left-color:#9ece6a}.objectives{border-left-color:#e0af68}textarea,.numeric{width:100%;box-sizing:border-box;padding:.75rem;border-radius:8px;border:1px solid #3a465b;background:#0c111b;color:#eef2ff;margin-top:.6rem}.review-card{padding:1rem;margin:1rem 0;border:1px solid #34425a;border-radius:12px}.review-card blockquote{white-space:pre-wrap;background:#0c111b;padding:1rem;border-radius:8px}.review-card form{display:grid;gap:.8rem}.score span{text-transform:uppercase;font-size:.65rem;letter-spacing:.08em}.lesson fieldset{margin-bottom:1rem}

.infra-symbol{background:transparent;border:0;color:#fff;font-weight:900;text-shadow:0 2px 5px #000;display:flex!important;align-items:center;gap:4px;font-size:28px;white-space:nowrap;filter:drop-shadow(0 0 5px #000)}
.infra-symbol span{font-size:10px;letter-spacing:.08em;background:#0b1118e8;border:2px solid #fff;border-radius:5px;padding:2px 5px;color:#fff;text-shadow:none}
.airport-symbol{font-size:34px;color:#ffd166}.airport-symbol span{border-color:#ffd166;color:#ffd166}
.port-symbol{color:#7fd3ff}.port-symbol span{border-color:#7fd3ff;color:#7fd3ff}
.dam-symbol{color:#f09b8f}.dam-symbol span{border-color:#f09b8f;color:#f09b8f}
select{width:100%;padding:12px;margin-top:6px;background:#0d151c;border:1px solid var(--line);border-radius:8px;color:#fff}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;align-items:end}.invite-list{margin-top:18px}.invite-row{display:grid;grid-template-columns:220px 1fr;gap:14px;align-items:center;padding:10px 0;border-top:1px solid var(--line)}.invite-row input{margin:0}.user-card{margin:15px 0}.user-title{display:flex;justify-content:space-between;gap:20px;align-items:center}.user-title h2{margin:0}.status-pill{font-size:.72rem;font-weight:900;letter-spacing:.08em;padding:5px 9px;border-radius:99px}.status-pill.on{background:#173c29;color:#7ce7a8}.status-pill.off{background:#412020;color:#ff9b9b}.permission-row{display:flex;gap:18px;align-items:center;flex-wrap:wrap;padding:12px 0}.permission-row label{display:flex!important;gap:7px;align-items:center;margin:0!important}.permission-row input{width:auto!important;margin:0!important}.password-row{display:grid;grid-template-columns:minmax(240px,1fr) auto 1fr;gap:12px;align-items:end;border-top:1px solid var(--line);padding-top:12px}.password-row label{margin:0!important}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}.tips{display:grid;gap:10px}.tip{background:#0d151c;border-left:4px solid var(--accent);padding:13px 15px;border-radius:7px}@media(max-width:760px){.invite-row,.password-row{grid-template-columns:1fr}.user-title{align-items:flex-start}.permission-row{display:grid;grid-template-columns:1fr 1fr}}

/* Phase 5: skills, assignments, academic years */
.skill-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}.skill-grid article{padding:15px;border:1px solid #2d3c4d;border-radius:12px;background:#111b27}.skill-head{display:flex;justify-content:space-between;gap:12px}.skill-bar{height:8px;background:#253141;border-radius:999px;overflow:hidden;margin:10px 0}.skill-bar i{display:block;height:100%;background:#58d68d;border-radius:999px}.muted-skill{opacity:.6}.assignment-grid{display:grid;gap:12px}.assignment-card{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:16px;border:1px solid #33465b;border-radius:12px;background:#111b27}.year-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin:14px 0}.year-grid article{border:1px solid #33465b;border-radius:12px;padding:14px}.filter-row{display:flex;gap:16px;align-items:end;flex-wrap:wrap}.filter-row label{min-width:220px}.metric{overflow-wrap:anywhere}.assignment-card .tag{margin-bottom:8px}