:root{--bg:#f7f8fb;--panel:#ffffff;--panel-soft:#f0f5f3;--ink:#1b2320;--muted:#68746f;--line:#dde5e1;--primary:#1f7a5a;--primary-dark:#14583f;--accent:#ba5a31;--danger:#b3261e;--shadow:0 12px 32px rgba(34,48,42,0.08)}*{box-sizing:border-box}body,html{margin:0;min-height:100%;background:var(--bg);color:var(--ink);font-family:Arial,Malgun Gothic,Apple SD Gothic Neo,sans-serif}button,input,select,textarea{font:inherit}button{border:0;cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}.shell{min-height:100vh}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:10;border-bottom:1px solid var(--line);background:rgba(255,255,255,.92);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;max-width:1180px;margin:0 auto;padding:14px 20px}.brand{display:grid;grid-gap:2px;gap:2px}.brand strong{font-size:18px}.brand span,.muted{color:var(--muted);font-size:13px}.main{max-width:1180px;margin:0 auto;padding:24px 20px 48px}.login-wrap{display:grid;min-height:100vh;place-items:center;padding:24px}.card,.login-panel,.panel{border:1px solid var(--line);border-radius:8px;background:var(--panel);box-shadow:var(--shadow)}.login-panel{width:min(440px,100%);padding:28px}.panel{padding:20px}.panel-header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:16px}.cleaning-panel .panel-header{margin-bottom:10px}.cleaning-panel.grid{gap:0}.cleaning-panel .panel-header .muted{margin:16px 0 0}.cleaning-panel form .field:first-child{margin-top:16px}.panel-title{margin:0;font-size:20px}.penalty-form{gap:6px}.penalty-form .panel-header{margin-bottom:5px}.grid{display:grid;grid-gap:16px;gap:16px}.period-list{max-height:min(52vh,370px);overflow-y:auto;padding:4px;scrollbar-gutter:stable}.period-card{display:grid;grid-gap:8px;gap:8px;position:relative;padding:12px 72px 12px 12px}.period-card .muted{margin:0}.period-card .badge{position:absolute;top:12px;right:12px;width:auto}.period-card-actions{display:flex;gap:8px;justify-content:flex-start}.audit-card{padding-right:12px}.audit-card dl{display:grid;grid-gap:6px;gap:6px;margin:0}.audit-card dl div{display:grid;grid-template-columns:56px minmax(0,1fr);grid-gap:8px;gap:8px}.audit-card dt{color:var(--muted);font-size:12px;font-weight:700}.audit-card dd{margin:0;color:var(--ink);font-size:13px;word-break:keep-all}.period-form-actions .btn-primary{flex:1 1 240px}.period-form{align-self:start}form.penalty-form{display:flex;flex-direction:column;min-height:100%}.penalty-form .btn[type=submit],.penalty-form .field,.penalty-form .reason-picker,.penalty-form .two-col{margin-top:10px}.penalty-form .btn[type=submit]{width:100%;margin-top:auto}.penalty-form .panel-header+.two-col{margin-top:0}.dashboard{grid-template-columns:repeat(2,minmax(0,1fr))}.dashboard,.history-stack,.tab-stack{display:grid;grid-gap:16px;gap:16px}.active-period-strip{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:12px 14px;box-shadow:var(--shadow)}.active-period-strip span{color:var(--muted);font-size:13px;font-weight:700}.active-period-strip strong{color:var(--primary-dark);font-size:14px}.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:12px;gap:12px}.field{display:block}.field-title,.field>label{display:block;color:var(--muted);font-size:13px;font-weight:700;margin-bottom:10px}.input,.select,.textarea{width:100%;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);padding:11px 12px;outline:none}.textarea{min-height:84px;resize:vertical}.input:focus,.select:focus,.textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(31,122,90,.14)}.select-compact{min-height:34px;padding:6px 8px}.table-input,.table-select{min-width:0;padding:7px 8px}.input[readonly]{background:var(--panel-soft);color:var(--muted);cursor:default}.password-field{position:relative}.password-field .input{padding-right:62px}.password-toggle{position:absolute;top:50%;right:8px;min-width:46px;min-height:30px;border-radius:8px;background:var(--panel-soft);color:var(--primary-dark);transform:translateY(-50%);font-size:12px;font-weight:700}.reason-picker{display:block;border:0;margin:0;padding:0}.reason-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:8px;gap:8px}.late-reason-row{margin-bottom:8px}.late-reason-row-first{grid-template-columns:repeat(2,minmax(0,1fr))}.late-reason-row-second{grid-template-columns:repeat(3,minmax(0,1fr));margin-bottom:8px}.reason-option{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;grid-gap:8px;gap:8px;min-height:46px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);margin-bottom:0;padding:10px 12px}.reason-option:has(input:checked){border-color:var(--primary);background:var(--panel-soft);color:var(--primary-dark)}.reason-option input{width:16px;height:16px;accent-color:var(--primary)}.reason-option span{min-width:0;font-size:14px;font-weight:700;word-break:keep-all}.reason-option strong{font-size:13px}.student-check-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));grid-gap:8px;gap:8px}.student-check{display:inline-flex;align-items:center;justify-content:center;min-height:34px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);padding:6px 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var(--line);border-radius:8px;background:#fff;overflow:hidden}.tab{min-height:44px;border-right:1px solid var(--line);border-radius:0;background:transparent;color:var(--muted);padding:10px 12px;font-weight:700}.tab:last-child{border-right:0}.tab.active{box-shadow:inset 0 -3px 0 var(--primary);background:var(--panel-soft);color:var(--primary-dark)}.stat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:12px;gap:12px}.stat{border:1px solid var(--line);border-radius:8px;background:var(--panel-soft);padding:14px}.stat span{display:block;color:var(--muted);font-size:12px;font-weight:700}.stat strong{display:block;margin-top:6px;font-size:24px}.student-no-list{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}.student-no-list .student-no-pill{display:inline-flex;align-items:center;min-height:32px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--primary-dark);margin-top:0;padding:0 10px;font-size:16px}.stat-actions{display:block;margin-top:12px}.cleaning-cancel-row{display:flex;justify-content:flex-start;margin-top:10px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;min-width:640px}.student-table-wrap{overflow-x:visible}.student-table{min-width:0;table-layout:fixed}.student-table td:first-child,.student-table td:nth-child(3),.student-table th:first-child,.student-table th:nth-child(3){width:72px}.student-table td:nth-child(4),.student-table th:nth-child(4){width:112px}td,th{border-bottom:1px solid var(--line);padding:11px 10px;vertical-align:middle}td,th{text-align:center}th{color:var(--muted);font-size:12px}.student-table td,.student-table th{vertical-align:middle;word-break:keep-all}.student-table .button-row,.table-actions{flex-wrap:nowrap}.table-actions{justify-content:center}.badge{display:inline-flex;align-items:center;border-radius:999px;background:var(--panel-soft);color:var(--primary-dark);padding:5px 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