:root{--bg:#1e1a14;--bg-surface:#252018;--bg-hover:#2e281e;--border:#3a3228;--text:#d8c8a8;--text-bright:#efe4cc;--text-dim:#9a8e78;--green:#8ab860;--red:#e06050;--yellow:#d8b050;--font-sans:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--font-mono:"SF Mono", "Cascadia Code", "Consolas", monospace}[data-theme=light]{--bg:#f5f0e8;--bg-surface:#ebe5da;--bg-hover:#e0d8cc;--border:#d0c8b8;--text:#4a4030;--text-bright:#2a2018;--text-dim:#8a7e68;--green:#3a7a18;--red:#d03020;--yellow:#907018}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6;overflow-x:hidden}a{color:var(--text-bright);text-underline-offset:3px;-webkit-text-decoration:underline dotted;text-decoration:underline dotted}a:hover{color:var(--green)}.app{flex-direction:column;flex:1;max-width:640px;min-height:100vh;margin:0 auto;padding:2rem 1.5rem 0;display:flex;overflow-x:hidden}.app-content{flex:1}@media (width>=1024px){.app{max-width:900px;font-size:1.05rem}}.app-footer{text-align:center;color:var(--text-dim);border-top:1px solid var(--border);margin-top:auto;padding:2rem 0 1rem;font-size:.825rem}.header{border-bottom:1px solid var(--border);margin-bottom:2.5rem;padding-bottom:1rem}.header-top{justify-content:space-between;align-items:center;margin-bottom:.5rem;display:flex}.header-bottom{justify-content:space-between;align-items:center;gap:.5rem;display:flex}.header h1{color:var(--text-bright);letter-spacing:-.02em;font-size:1.4rem;font-weight:600}.header-actions{align-items:center;gap:.35rem;display:flex}@media (width>=1024px){.header h1{font-size:2.8rem}}.header-nav{gap:.25rem;display:flex}.header-nav button{color:var(--text-dim);font:inherit;cursor:pointer;background:0 0;border:none;border-radius:4px;padding:.35rem .75rem;font-size:.85rem;transition:color .2s,background .2s}.header-nav button:hover,.header-nav button.active{color:var(--text-bright);background:var(--bg-hover)}.theme-toggle{border:1px solid var(--border);color:var(--text-dim);font:inherit;cursor:pointer;background:0 0;border-radius:4px;padding:.3rem .6rem;font-size:.8rem;transition:color .2s,border-color .2s}.theme-toggle:hover{color:var(--text-bright);border-color:var(--text-dim)}.login-form{max-width:360px}.login-form h2{color:var(--text-bright);margin-bottom:.5rem;font-size:1.3rem;font-weight:600}.login-form p{color:var(--text-dim);margin-bottom:1.5rem;font-size:.85rem;font-style:italic}.form-group{margin-bottom:1rem}.form-group label{text-transform:uppercase;letter-spacing:.1em;color:var(--text-dim);margin-bottom:.35rem;font-size:.75rem;display:block}.form-group input{background:var(--bg-surface);border:1px solid var(--border);width:100%;max-width:100%;color:var(--text-bright);font:inherit;font-size:.95rem;font-family:var(--font-mono);border-radius:4px;padding:.65rem .75rem;transition:border-color .2s}.form-group input:focus{border-color:var(--green);outline:none}.form-group input::placeholder{color:var(--text-dim);opacity:.6}.checkbox-group{align-items:center;gap:.5rem;margin-bottom:1.25rem;display:flex}.checkbox-group input[type=checkbox]{accent-color:var(--green)}.checkbox-group label{color:var(--text-dim);text-transform:none;letter-spacing:0;margin-bottom:0;font-size:.85rem}.btn{border:1px solid var(--border);background:var(--bg-surface);color:var(--text-bright);font:inherit;cursor:pointer;border-radius:4px;justify-content:center;align-items:center;min-width:120px;padding:.6rem 1.25rem;font-size:.9rem;transition:background .2s,border-color .2s;display:inline-flex}.btn:hover{background:var(--bg-hover);border-color:var(--text-dim)}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--green);border-color:var(--green);color:#1e1a14;font-weight:600}.btn-primary:hover{opacity:.9;border-color:var(--green)}.error-msg{color:var(--red);margin-top:.75rem;font-size:.85rem;font-style:italic}.login-page{max-width:360px;margin:3rem auto}.login-page .login-form{margin:0}.password-field{position:relative}.password-field input{width:100%;padding-right:3.5rem}.show-pw-btn{color:var(--text-dim);font:inherit;cursor:pointer;background:0 0;border:none;padding:.2rem .3rem;font-size:.8rem;transition:color .2s;position:absolute;top:50%;right:.5rem;transform:translateY(-50%)}.show-pw-btn:hover{color:var(--text-bright)}.faq-page h2{color:var(--text-bright);margin-bottom:1.25rem;font-size:1.56rem}.faq-page .faq-item{border-bottom:1px dotted var(--border)}.faq-item summary{color:var(--text-bright);cursor:pointer;padding:.6rem 0;font-size:1.02rem;list-style:none}.faq-item summary:before{content:"+ ";color:var(--text-dim)}.faq-item[open] summary:before{content:"- "}.faq-item summary::-webkit-details-marker{display:none}.faq-item p{color:var(--text-dim);padding-bottom:.6rem;font-size:.96rem;font-style:italic;line-height:1.5}.faq-back{border:1px solid var(--border);color:var(--text-dim);font:inherit;cursor:pointer;background:0 0;border-radius:4px;margin-top:1.5rem;padding:.4rem 1rem;font-size:.96rem;transition:color .2s,border-color .2s;display:inline-block}.faq-back:hover{color:var(--text-bright);border-color:var(--text-dim)}.app-footer{text-align:center;border-top:1px solid var(--border);padding:1.5rem 0 1rem}.footer-links{justify-content:center;gap:.5rem;margin-bottom:.5rem;display:flex}.footer-links a,.footer-links .faq-link{color:var(--text-dim);cursor:pointer;font-size:1.06rem;font:inherit;background:0 0;border:none;padding:0;text-decoration:none;transition:color .2s}.footer-links a:hover,.footer-links .faq-link:hover{color:var(--text-bright)}.footer-sep{color:var(--text-dim);font-size:.825rem}.footer-credit{color:var(--text-dim);margin:0;font-size:.825rem}.footer-credit a{color:var(--text);text-underline-offset:3px;-webkit-text-decoration:underline dotted;text-decoration:underline dotted;transition:color .2s}.footer-credit a:hover{color:var(--text-bright)}.stats-grid{grid-template-columns:1fr 1fr;gap:.75rem;margin-bottom:2rem;display:grid}@media (width>=1024px){.stats-grid{grid-template-columns:repeat(4,1fr);gap:1rem}}.stat-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:4px;padding:1rem}.stat-label{text-transform:uppercase;letter-spacing:.12em;color:var(--text-dim);margin-bottom:.25rem;font-size:.7rem}.stat-value{color:var(--text-bright);font-variant-numeric:tabular-nums;font-size:1.6rem;font-weight:700}@media (width>=1024px){.stat-value{font-size:2rem}}.stat-value.green{color:var(--green)}.stat-value.red{color:var(--red)}.stat-value.yellow{color:var(--yellow)}.custom-calc{margin-bottom:2rem}.calc-row{align-items:center;gap:.75rem;display:flex}.calc-label{color:var(--text-dim);white-space:nowrap;font-size:.8rem}.calc-input{border:1px solid var(--border);background:var(--bg-surface);width:5rem;color:var(--text);font:inherit;-moz-appearance:textfield;border-radius:4px;outline:none;padding:.35rem .5rem;font-size:.85rem}.calc-input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.calc-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.calc-btn{padding:.35rem .75rem;font-size:.8rem}.calc-result{color:var(--text-dim);margin-top:.5rem;font-size:.8rem}.calc-result strong{color:var(--text-bright)}.section-title{text-transform:uppercase;letter-spacing:.15em;color:var(--text-dim);border-bottom:1px solid var(--border);margin-bottom:.75rem;padding-bottom:.5rem;font-size:.75rem}.attendance-list{list-style:none}.attendance-row{border-bottom:1px dotted var(--border);justify-content:space-between;align-items:baseline;gap:1rem;padding:.6rem 0;display:flex}.attendance-row:last-child{border-bottom:none}.attendance-name{color:var(--text);white-space:nowrap;text-overflow:ellipsis;flex:1;min-width:0;font-size:.9rem;overflow:hidden}.attendance-dots{border-bottom:1px dotted var(--border);flex:none;min-width:2rem;height:.5em;margin-bottom:.3em}.attendance-pct{font-variant-numeric:tabular-nums;color:var(--text-bright);white-space:nowrap;font-size:.9rem;font-weight:600}.attendance-pct.low{color:var(--red)}.attendance-pct.mid{color:var(--yellow)}.attendance-pct.high{color:var(--green)}.absent-list{list-style:none}.absent-row{border-bottom:1px dotted var(--border);justify-content:space-between;gap:.75rem;padding:.5rem 0;font-size:.85rem;display:flex}.absent-row:last-child{border-bottom:none}.absent-day{color:var(--text-dim);min-width:3rem}.absent-course{color:var(--text);white-space:nowrap;text-overflow:ellipsis;flex:1;overflow:hidden}.absent-status{color:var(--red);white-space:nowrap;font-weight:500}.leaderboard-controls{flex-wrap:wrap;gap:.5rem;margin-bottom:1rem;display:flex}.leaderboard-controls select{background:var(--bg-surface);border:1px solid var(--border);color:var(--text);font:inherit;cursor:pointer;border-radius:4px;padding:.4rem .6rem;font-size:.8rem}.leaderboard-controls select:focus{border-color:var(--green);outline:none}.leaderboard-list{list-style:none}.leaderboard-row{border-bottom:1px dotted var(--border);align-items:baseline;gap:.75rem;padding:.6rem 0;display:flex}.leaderboard-row:last-child{border-bottom:none}.leaderboard-rank{color:var(--text-dim);font-variant-numeric:tabular-nums;min-width:1.5rem;font-size:.75rem}.leaderboard-usn{font-family:var(--font-mono);color:var(--text);flex:1;font-size:.85rem}.leaderboard-pct{font-variant-numeric:tabular-nums;color:var(--text-bright);font-size:.9rem;font-weight:600}.leaderboard-branch{color:var(--text-dim);text-align:right;min-width:3rem;font-size:.75rem}.leaderboard-time{color:var(--text-dim);white-space:nowrap;text-align:right;min-width:7rem;font-size:.7rem}.loading{text-align:center;color:var(--text-dim);padding:3rem 0;font-style:italic}.empty-state{text-align:center;color:var(--text-dim);padding:3rem 0}.empty-state p{font-style:italic}.logout-btn{color:var(--text-dim);font:inherit;cursor:pointer;background:0 0;border:none;border-radius:4px;padding:.35rem .75rem;font-size:.8rem;transition:color .2s}.logout-btn:hover{color:var(--red)}@media (width<=639px){.app{padding:1.25rem 1rem 3rem}.header{margin-bottom:1.5rem}.header h1{font-size:1.15rem}.header-bottom{flex-wrap:wrap}.stat-value{font-size:1.3rem}.attendance-row{flex-wrap:wrap}.attendance-dots{display:none}.attendance-name{flex:100%;margin-bottom:.15rem}.attendance-pct{font-size:.8rem}.leaderboard-controls{flex-direction:column}}@media (width>=1024px){.leaderboard-row{gap:1rem}}