:root{--ink: #211818;--maroon-black: #2a0c14;--maroon-deep: #49121f;--maroon: #631929;--cream: #f9f4eb;--parchment: #eee2d0;--warm-gray: #c6b5a0;--gold: #c4914d;--gold-dark: #976934;--off-white: #fffcf6;--charcoal: #35302e;--border: #e2cdb0;--danger: #b0392b;--success: #3f7d4f;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}body{margin:0;font-family:var(--font);background:var(--cream);color:var(--ink);overflow-x:hidden}a{color:var(--maroon)}.app-shell{display:flex;min-height:100vh}.sidebar{width:220px;flex-shrink:0;background:var(--maroon-black);color:var(--parchment);padding:24px 16px;display:flex;flex-direction:column;gap:4px}.sidebar h1{font-size:16px;letter-spacing:.04em;color:var(--off-white);margin:0 0 20px;text-transform:uppercase}.sidebar a{color:var(--parchment);text-decoration:none;padding:10px 12px;border-radius:6px;font-size:14px}.sidebar a:hover,.sidebar 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780px){.app-shell{flex-direction:column;min-height:0}.sidebar{width:100%;flex-direction:row;align-items:center;gap:6px;padding:10px 12px;overflow-x:auto;-webkit-overflow-scrolling:touch}.sidebar h1{display:none}.sidebar a{flex-shrink:0;padding:8px 12px}.main{padding:16px;max-width:100%;width:100%;overflow-x:hidden}.card{padding:16px;max-width:100%}.page-heading,.course-card{flex-direction:column;align-items:stretch}.page-heading .btn{align-self:flex-start}.row>*{min-width:100%;flex-basis:100%}.mode-picker{grid-template-columns:1fr}input[type=file]{display:block;max-width:100%;width:100%}.tree-module{padding-left:10px}h1{font-size:22px}.main div[style*="display: flex"],.main div[style*="display:flex"]{flex-wrap:wrap}}