:root{--twilight:#2b4c7e;--twilight-light:#456fbf;--twilight-dark:#1a3360;--sidebar-bg:#2f4a6e;--sidebar-hover:#ffffff12;--role-student:#5d9b7c;--role-student-bg:#5d9b7c1f;--role-teacher:#4a7fb5;--role-teacher-bg:#4a7fb51f;--role-admin:#8b6bae;--role-admin-bg:#8b6bae1f;--sunset:#f08060;--sunset-light:#fdd1b8;--sunset-hover:#e0684a;--paper:#f9f7f4;--white:#fff;--rock:#1e2b3a;--rock-light:#4b5d6e;--error:#d94a4a;--border-light:#edebe6;--shadow-sm:0 1px 3px #0000000a;--shadow-hover:0 3px 12px #0000000f;--font-display:"Noto Serif SC", serif;--font-body:"Noto Sans SC", system-ui, sans-serif;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--shadow-card:0 4px 24px #00000014;--shadow-btn:0 2px 8px 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