:root{--hawaii: #00A5C9;--hawaii-dark: #0077A0;--hawaii-bg: #E8F7FB;--hawaii-bg-2: #F4FBFD;--ink: #1E1E1E;--muted: #5A6B72;--line: #D8E7EC;--white: #FFFFFF;--shadow: 0 2px 14px rgba(0, 90, 120, .1);--radius: 12px;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--white);color:var(--ink)}.app-header{background:linear-gradient(90deg,var(--hawaii-dark),var(--hawaii));color:#fff;padding:14px 26px;display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;box-shadow:var(--shadow);position:sticky;top:0;z-index:20}.app-header .kolegij{font-weight:700;letter-spacing:.5px;opacity:.9;font-size:13px;text-transform:uppercase}.app-header h1{font-size:20px;margin:0;font-weight:800}.app-header .autor{margin-left:auto;text-align:right;font-size:12.5px;line-height:1.4;opacity:.95}.layout{display:grid;grid-template-columns:minmax(340px,44%) 1fr;gap:0;height:calc(100vh - 56px)}@media (max-width: 900px){.layout{grid-template-columns:1fr;height:auto}.text-pane{height:auto!important;max-height:none!important;border-right:none!important}.demo-pane{position:static!important;height:auto!important}}.text-pane{overflow-y:auto;height:100%;padding:28px 34px 80px;border-right:1px solid var(--line);background:#fff}.text-pane h2{color:var(--hawaii-dark);font-size:21px;margin:34px 0 10px;padding-bottom:6px;border-bottom:2px solid var(--hawaii)}.text-pane h2:first-child{margin-top:4px}.text-pane h3{color:var(--ink);font-size:16px;margin:18px 0 6px}.text-pane p{line-height:1.62;margin:8px 0;color:#26333a;font-size:15px}.text-pane .lead{font-size:16px;color:var(--muted)}.text-pane ul{line-height:1.6;padding-left:20px}.text-pane .callout{background:var(--hawaii-bg);border-left:4px solid var(--hawaii);border-radius:8px;padding:12px 14px;margin:14px 0;font-size:14.5px}.text-pane .callout b{color:var(--hawaii-dark)}.eq{background:var(--hawaii-bg-2);border:1px solid var(--line);border-radius:8px;padding:10px 14px;margin:12px 0;font-family:"Cambria Math",Georgia,serif;font-style:italic;text-align:center;font-size:15.5px;overflow-x:auto}.demo-link{display:inline-block;margin-top:6px;color:var(--hawaii-dark);font-weight:600;font-size:13.5px;cursor:pointer;border:none;background:none;padding:0;text-decoration:underline}.demo-pane{position:sticky;top:56px;height:calc(100vh - 56px);display:flex;flex-direction:column;background:var(--hawaii-bg-2)}.tabs{display:flex;gap:6px;padding:14px 16px 0;flex-wrap:wrap;background:transparent}.tab{border:1px solid var(--line);background:#fff;color:var(--muted);padding:7px 13px;border-radius:999px;font-size:13px;font-weight:600;cursor:pointer;transition:all .15s ease}.tab:hover{border-color:var(--hawaii);color:var(--hawaii-dark)}.tab.active{background:var(--hawaii);color:#fff;border-color:var(--hawaii)}.demo-body{flex:1;overflow-y:auto;padding:16px 22px 28px}.demo-title{color:var(--hawaii-dark);font-size:18px;font-weight:800;margin:6px 0 2px}.demo-desc{color:var(--muted);font-size:13.5px;margin:0 0 12px;line-height:1.5}.demo-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px}.controls{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-top:12px}.controls label{font-size:13px;color:var(--ink);display:flex;align-items:center;gap:6px}button.btn{background:var(--hawaii);color:#fff;border:none;padding:8px 14px;border-radius:8px;font-weight:600;cursor:pointer;font-size:13.5px}button.btn:hover{background:var(--hawaii-dark)}button.btn.ghost{background:#fff;color:var(--hawaii-dark);border:1px solid var(--hawaii)}button.btn.ghost:hover{background:var(--hawaii-bg)}input[type=range]{accent-color:var(--hawaii)}.readout{font-family:ui-monospace,SF Mono,Menlo,Consolas,monospace;font-size:13px;background:var(--hawaii-bg);border-radius:6px;padding:6px 10px;color:var(--hawaii-dark);display:inline-block;margin-top:8px}.phase-row{display:flex;gap:8px;margin-top:12px}.phase{flex:1;text-align:center;padding:8px 4px;border-radius:8px;font-size:12.5px;font-weight:700;border:2px solid var(--line);color:var(--muted);background:#fff;transition:all .12s ease}.phase.on{border-color:var(--hawaii);background:var(--hawaii);color:#fff}.hint{font-size:12.5px;color:var(--muted);margin-top:10px;line-height:1.5}svg{display:block;max-width:100%}.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-top:8px}.legend .sw{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:5px;vertical-align:-1px}#root{display:flex;flex-direction:column}.layout{height:auto;flex:1 1 auto;min-height:0}.lecture-nav{display:flex;align-items:center;gap:8px;margin-left:auto;align-self:center}.lnav-btn{display:inline-flex;align-items:center;gap:4px;font-size:13px;font-weight:700;line-height:1;color:#fff;text-decoration:none;background:#ffffff29;border:1px solid rgba(255,255,255,.4);padding:7px 12px;border-radius:999px;transition:background .15s ease;white-space:nowrap}.lnav-btn:hover{background:#ffffff52}.lnav-home{background:#fff;color:var(--hawaii-dark);border-color:transparent}.lnav-home:hover{background:#eafaff}.lnav-disabled{opacity:.4;pointer-events:none}.lnav-pos{font-size:12.5px;font-weight:700;opacity:.92;padding:0 2px;white-space:nowrap}.lnav-total{opacity:.7}@media (max-width: 900px){.lecture-nav{margin-left:0;width:100%;padding-top:6px}}.materials-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:8px 26px;background:var(--hawaii-bg);border-bottom:1px solid var(--line);font-size:13px}.materials-label{font-weight:700;color:var(--hawaii-dark);text-transform:uppercase;letter-spacing:.5px;font-size:12px;margin-right:2px}.mat-btn{display:inline-flex;align-items:center;gap:6px;text-decoration:none;font-weight:600;font-size:13px;color:var(--hawaii-dark);background:#fff;border:1px solid var(--line);padding:6px 12px;border-radius:8px;transition:background .15s ease,border-color .15s ease,transform .15s ease,box-shadow .15s ease}.mat-btn:hover{border-color:var(--hawaii);transform:translateY(-1px);box-shadow:var(--shadow)}.mat-ico{font-size:14px;line-height:1}