*{box-sizing:border-box}body{margin:0;background:#f4f6f3;color:#20352e;font-family:Inter,"Microsoft YaHei",sans-serif;font-size:15px}button,input,select,textarea{font:inherit}button{cursor:pointer;border:1px solid #d7e1d9;background:#fff;border-radius:12px;padding:10px 16px;color:inherit}button:hover{background:#e7eee7}button.primary{background:#166b59;color:#fff;border-color:#166b59}button.danger{color:#a33e3e}input,select,textarea{width:100%;border:1px solid #cad7ce;border-radius:10px;padding:11px;background:#fff;color:inherit}input[type=checkbox]{width:auto}label{display:block;margin:14px 0 5px;font-size:13px;color:#52685c}h1,h2,h3,p{margin-top:0}h1{font-size:30px;letter-spacing:-1px}h2{font-size:21px}h3{font-size:17px}small,.muted{color:#6d7d73;font-size:13px}main{max-width:1180px;margin:auto;padding:30px 24px 70px}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:35px}.brand{font-size:23px;font-weight:750;display:flex;align-items:center;gap:12px}.logo{width:40px;height:40px;background:#166b59;color:white;border-radius:13px;display:grid;place-items:center}.toplinks{display:flex;gap:8px}.hero{display:grid;grid-template-columns:1.45fr 1fr;gap:24px;margin-bottom:25px}.greeting{padding:22px 0}.eyebrow{font-size:12px;letter-spacing:2px;color:#166b59;font-weight:bold;margin-bottom:12px}.next{background:#166b59;color:white;padding:25px;border-radius:22px}.next small{color:#cce0d5}.next h2{margin:13px 0 8px}.nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:22px 0}.nav .active{background:#203e31;color:white}.spacer{flex:1}.datebar{display:flex;gap:8px;align-items:center;margin-bottom:18px}.datebar input{width:auto}.cards{display:grid;gap:12px}.card{background:white;border:1px solid #e0e7df;border-radius:16px;padding:20px;display:flex;gap:22px;align-items:flex-start}.card .time{min-width:95px;color:#166b59;font-weight:650}.card .time small{display:block;font-weight:400;margin-top:6px}.card h3{margin-bottom:8px}.card p{margin:6px 0}.card .actions{margin-left:auto;display:flex;gap:6px}.tag{font-size:11px;border-radius:6px;background:#e9f3ec;color:#166b59;padding:4px 7px;margin-left:8px}.changed{border-left:4px solid #d49c4c}.cancelled{opacity:.65}.cancelled h3{text-decoration:line-through}.note{padding:16px 20px;background:#eef0e6;border-radius:12px;margin:20px 0;color:#61705a;font-size:13px;line-height:1.8}.empty{background:white;border:1px dashed #cbd9ca;border-radius:16px;padding:45px;text-align:center;color:#6d7d73}.weekwrap{overflow-x:auto}.weekgrid{display:grid;grid-template-columns:repeat(7,minmax(140px,1fr));gap:8px;min-width:1000px}.dayhead{text-align:center;padding:12px;border-radius:10px;background:#e9eee7;margin-bottom:9px}.dayhead.today{background:#166b59;color:white}.weekcard{padding:13px;background:white;border:1px solid #dce5da;border-radius:11px;margin-bottom:8px;line-height:1.65;border-top:3px solid #77a58b}.weekcard strong{display:block;margin:5px 0}.weekcard button{padding:4px 8px;font-size:12px}.history{background:white;border-radius:14px;padding:20px;margin:12px 0;line-height:1.8}.row{display:flex;gap:12px}.row>*{flex:1}.toolbar{display:flex;gap:8px;flex-wrap:wrap}.auth{max-width:420px;margin:12vh auto;background:white;padding:32px;border-radius:24px}.auth button{width:100%;margin-top:20px}.auth h1{margin-top:24px}.error{color:#a33e3e;min-height:20px;line-height:1.6}dialog{border:0;border-radius:20px;padding:28px;width: min(550px,94vw);max-height:90vh;overflow:auto;box-shadow:0 24px 80px #1233}dialog::backdrop{background:#19372c66}.modalhead{display:flex;justify-content:space-between;align-items:center}.modalhead button{border:0;padding:6px 10px}.foot{margin-top:28px;line-height:1.8;color:#7d897e;font-size:12px}.formfoot{display:flex;gap:10px;margin-top:22px;justify-content:flex-end}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#203e31;color:white;border-radius:10px;padding:12px 20px;display:none;z-index:5}.setting{background:white;padding:25px;border-radius:18px;margin-bottom:18px}.course-list{max-height:350px;overflow:auto}.course-row{display:flex;gap:10px;align-items:center;padding:12px 0;border-bottom:1px solid #edf0e9}.course-row div{flex:1}@media(max-width:700px){main{padding:20px 16px 60px}header{margin-bottom:18px}.brand{font-size:20px}.hero{grid-template-columns:1fr;gap:0}.greeting{padding:20px 0 10px}h1{font-size:27px}.toplinks button{padding:8px 10px;font-size:13px}.card{padding:16px;gap:12px;flex-wrap:wrap}.card .time{min-width:76px;font-size:14px}.card .actions{width:100%;justify-content:flex-end}.nav button{padding:9px 12px}.datebar{flex-wrap:wrap}.datebar input{max-width:150px}.row{gap:8px}.next{padding:22px}.card h3{font-size:16px}.auth{margin:8vh auto;padding:25px}}

/* Fixed period timetable: empty periods retain their space. */
.period-grid{display:grid;grid-template-columns:64px repeat(7,minmax(130px,1fr));grid-template-rows:62px repeat(13,88px);min-width:1050px;gap:0;border:1px solid #d8e2d8;border-radius:14px;background:#fff;isolation:isolate}.period-corner{grid-column:1;grid-row:1;display:grid;place-items:center;background:#e9eee7;font-size:13px;color:#657965;border-bottom:1px solid #d8e2d8}.period-day{grid-row:1;text-align:center;display:flex;flex-direction:column;justify-content:center;gap:5px;background:#e9eee7;border-left:1px solid #d8e2d8;border-bottom:1px solid #d8e2d8}.period-day.today{background:#166b59;color:#fff}.period-day.today small{color:#dcece4}.period-label{grid-column:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;background:#f3f6f1;border-bottom:1px solid #e0e7df}.period-label strong{font-size:18px;font-weight:600;color:#365846}.period-label small{font-size:11px;text-align:center;line-height:1.4}.period-empty{border-left:1px solid #e0e7df;border-bottom:1px solid #e0e7df;background:#fcfdfb}.period-course{z-index:1;margin:4px;padding:10px;background:#edf5ee;border:1px solid #c9decf;border-top:3px solid #77a58b;border-radius:10px;overflow:auto;display:flex;flex-direction:column;align-items:flex-start;gap:7px;min-width:0;font-size:13px;line-height:1.55}.period-course strong{font-size:14px;color:#203e31}.period-course small{font-size:11px}.period-course span{overflow-wrap:anywhere}.period-course button{margin-top:auto;padding:4px 10px;font-size:12px}.period-course.changed{background:#fff5e7;border-color:#dfc499}.period-label,.period-corner{position:sticky;left:0;z-index:2}.period-corner{z-index:3}
.period-1{grid-row-start:2}.span-1{grid-row-end:span 1}
.period-2{grid-row-start:3}.span-2{grid-row-end:span 2}
.period-3{grid-row-start:4}.span-3{grid-row-end:span 3}
.period-4{grid-row-start:5}.span-4{grid-row-end:span 4}
.period-5{grid-row-start:6}.span-5{grid-row-end:span 5}
.period-6{grid-row-start:7}.span-6{grid-row-end:span 6}
.period-7{grid-row-start:8}.span-7{grid-row-end:span 7}
.period-8{grid-row-start:9}.span-8{grid-row-end:span 8}
.period-9{grid-row-start:10}.span-9{grid-row-end:span 9}
.period-10{grid-row-start:11}.span-10{grid-row-end:span 10}
.period-11{grid-row-start:12}.span-11{grid-row-end:span 11}
.period-12{grid-row-start:13}.span-12{grid-row-end:span 12}
.period-13{grid-row-start:14}.span-13{grid-row-end:span 13}
.column-2{grid-column:2}
.column-3{grid-column:3}
.column-4{grid-column:4}
.column-5{grid-column:5}
.column-6{grid-column:6}
.column-7{grid-column:7}
.column-8{grid-column:8}