:root{
  --font:Arial,sans-serif;
  --bg:#f6f8fa;
  --surface:#ffffff;
  --surface-subtle:#f8fafc;
  --surface-strong:#eef2f6;
  --text:#172033;
  --text-strong:#0b1220;
  --muted:#596579;
  --muted-2:#748094;
  --border:#d8dee7;
  --border-strong:#bcc6d4;
  --accent:#0969da;
  --accent-hover:#0558b8;
  --accent-soft:#eaf3ff;
  --success:#176b3a;
  --success-soft:#eaf7ef;
  --warning:#855900;
  --warning-soft:#fff5d9;
  --danger:#b42318;
  --danger-soft:#fff0ee;
  --nav:#111827;
  --nav-hover:#1f2937;
  --nav-active:#263447;
  --nav-text:#d9e1eb;
  --radius:10px;
  --radius-small:7px;
  --focus:#0b74de;
  --sidebar:268px;
  --topbar:76px;
}

*{box-sizing:border-box}
html{font-family:var(--font);font-size:16px;color:var(--text);background:var(--bg);scroll-behavior:smooth}
body{margin:0;min-width:320px;background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.52;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
button,input,select,textarea{font:inherit;color:inherit}
button,a,input,select,textarea,summary{outline:none}
a{color:inherit}
img{max-width:100%;height:auto}
[hidden]{display:none!important}

:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
::selection{background:#cfe6ff;color:#071426}

h1,h2,h3,p{margin-top:0}
h1,h2,h3,strong{color:var(--text-strong)}
h1{font-size:clamp(1.8rem,2.4vw,2.35rem);line-height:1.14;letter-spacing:-.025em;margin-bottom:10px}
h2{font-size:1.24rem;line-height:1.25;margin-bottom:8px}
h3{font-size:1.08rem;line-height:1.3;margin-bottom:8px}
p{margin-bottom:12px}
code{font-family:var(--font);font-weight:700;background:var(--surface-strong);border:1px solid var(--border);border-radius:5px;padding:2px 6px}

.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.skip-link{position:fixed;top:10px;left:10px;z-index:1000;background:#fff;color:#111827;border:2px solid var(--focus);padding:10px 14px;border-radius:6px;text-decoration:none;transform:translateY(-160%)}
.skip-link:focus{transform:none}

/* Authentication */
.auth-body,.login-body{min-height:100vh;background:#eef2f6}
.auth-shell,.login-shell{min-height:100vh;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(390px,.75fr);align-items:stretch;max-width:1320px;margin:0 auto;background:#fff;border-left:1px solid var(--border);border-right:1px solid var(--border)}
.auth-intro{display:flex;flex-direction:column;justify-content:space-between;min-height:100vh;padding:clamp(34px,6vw,88px);background:#f8fafc;border-right:1px solid var(--border)}
.brand-lockup{display:flex;align-items:center;gap:13px;text-decoration:none;width:max-content}
.brand-symbol,.brand-mark{display:grid;place-items:center;width:50px;height:50px;border-radius:9px;background:#1557a0;color:#fff;font-size:1rem;font-weight:800;letter-spacing:.03em;flex:0 0 auto}
.brand-symbol-small{width:40px;height:40px;border-radius:7px}
.brand-lockup>div,.brand-copy{display:grid;gap:1px}
.brand-lockup strong,.brand-copy strong{font-size:1.08rem}
.brand-lockup span:not(.brand-symbol),.brand-copy small{font-size:.9rem;color:var(--muted)}
.auth-message{max-width:660px;padding-bottom:8vh}
.auth-message h1{font-size:clamp(2.2rem,4.5vw,4.3rem);max-width:740px;letter-spacing:-.045em}
.auth-message>p:last-child{font-size:1.15rem;max-width:620px;color:var(--muted)}
.auth-card,.login-card{align-self:center;width:min(100% - 48px,500px);margin:auto;padding:clamp(26px,4vw,46px);background:#fff;border:1px solid var(--border);border-radius:var(--radius)}
.auth-card h2{font-size:1.5rem;margin-bottom:4px}
.auth-footnote{font-size:.91rem;color:var(--muted);margin:22px 0 0;border-top:1px solid var(--border);padding-top:18px}

/* Form system */
.form-stack{display:grid;gap:17px;margin-top:20px}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.form-grid.compact-form{margin-top:18px}
.form-stack label,.form-grid label,.quick-select label{display:grid;gap:7px;font-weight:700;font-size:1rem;color:var(--text-strong)}
input,select,textarea{width:100%;min-height:46px;border:1px solid var(--border-strong);border-radius:7px;background:#fff;padding:10px 12px;font-size:1rem;line-height:1.35}
textarea{min-height:104px;resize:vertical}
input:hover,select:hover,textarea:hover{border-color:#8d9aac}
input:focus,select:focus,textarea:focus{border-color:var(--focus);box-shadow:0 0 0 1px var(--focus)}
input[type="checkbox"],input[type="radio"]{width:20px;height:20px;min-height:20px;accent-color:var(--accent);padding:0}
fieldset{min-width:0;border:1px solid var(--border);border-radius:8px;padding:15px;margin:0}
legend{padding:0 7px;font-weight:800;color:var(--text-strong)}
.field-help{display:block;color:var(--muted);font-size:.9rem;font-weight:400;margin-top:6px}
.two-fields{grid-template-columns:repeat(2,minmax(0,1fr))}
.span-2{grid-column:1/-1}
.form-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:16px}
.form-actions.align-end{justify-content:flex-end}
.danger-zone{border-top:1px solid var(--border);margin-top:22px;padding-top:18px}

.button,.btn{appearance:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 16px;border:1px solid transparent;border-radius:7px;background:#fff;font-weight:800;font-size:.98rem;text-decoration:none;cursor:pointer;white-space:nowrap;transition:background-color .12s ease,border-color .12s ease,color .12s ease}
.button-small,.btn-small{min-height:38px;padding:7px 11px;font-size:.9rem}
.button-block,.btn-block{width:100%}
.button-primary,.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}
.button-primary:hover,.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}
.button-secondary,.btn-secondary{background:#fff;border-color:var(--border-strong);color:var(--text-strong)}
.button-secondary:hover,.btn-secondary:hover{background:var(--surface-subtle);border-color:#8795a8}
.button-quiet{background:transparent;border-color:transparent;color:#334155}
.button-quiet:hover{background:var(--surface-strong)}
.button-success{background:var(--success);border-color:var(--success);color:#fff}
.button-success:hover{background:#105a30}
.button-danger{background:#fff;border-color:#e6b8b3;color:var(--danger)}
.button-danger:hover{background:var(--danger-soft)}
.text-link,.strong-link{color:#075fbe;font-weight:800;text-decoration:none}
.text-link:hover,.strong-link:hover{text-decoration:underline;text-underline-offset:3px}

/* Shell / navigation */
.app-shell{min-height:100vh;display:grid;grid-template-columns:var(--sidebar) minmax(0,1fr)}
.sidebar{position:sticky;top:0;height:100vh;background:var(--nav);color:var(--nav-text);padding:18px 14px;display:flex;flex-direction:column;z-index:40;border-right:1px solid #0b1020}
.sidebar-brand{display:flex;align-items:center;gap:12px;padding:3px 8px 20px;text-decoration:none}
.sidebar-brand strong{color:#fff;font-size:1.03rem}.sidebar-brand small{color:#9eacbe;font-size:.83rem}
.side-nav{display:grid;gap:3px;overflow-y:auto;padding:2px 0 16px;scrollbar-width:thin}
.nav-group-label{font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#8391a5;padding:19px 12px 7px}
.nav-group-label:first-child{padding-top:6px}
.nav-link{display:flex;align-items:center;min-height:43px;padding:9px 12px;border-radius:6px;color:#d7e0eb;text-decoration:none;font-size:.96rem;font-weight:700;border-left:3px solid transparent}
.nav-link:hover{background:var(--nav-hover);color:#fff}
.nav-link.is-active{background:var(--nav-active);border-left-color:#6bb2ff;color:#fff}
.sidebar-footer{margin-top:auto;display:flex;justify-content:space-between;align-items:center;gap:10px;border-top:1px solid #2b3545;padding:16px 10px 2px;color:#a9b5c5;font-size:.81rem}
.version-text{font-weight:800;color:#d7e0eb}
.sidebar-overlay{position:fixed;inset:0;background:rgba(8,15,28,.48);z-index:35}
.main-column{min-width:0;min-height:100vh}
.topbar{height:var(--topbar);position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 30px;background:#fff;border-bottom:1px solid var(--border)}
.topbar-left{display:flex;align-items:center;gap:14px;min-width:0}
.topbar-title,.account-copy{display:grid;line-height:1.2}
.topbar-title strong{font-size:1.04rem}.topbar-title span,.account-copy span{font-size:.82rem;color:var(--muted);margin-top:4px}
.account-area{display:flex;align-items:center;gap:16px;text-align:right}.account-copy strong{font-size:.94rem}
.menu-button{display:none;width:46px;height:46px;border:1px solid var(--border);border-radius:7px;background:#fff;padding:11px;cursor:pointer}
.menu-button span{display:block;height:2px;background:#1f2937;margin:4px 0;border-radius:1px}
.content{width:min(100%,1720px);margin:0 auto;padding:34px clamp(22px,3vw,48px) 64px}

/* Headers / layout */
.page-header{margin-bottom:24px;max-width:1000px}
.page-header-split{max-width:none;display:flex;align-items:flex-end;justify-content:space-between;gap:28px}
.page-header-split>div:first-child{max-width:920px}
.section-kicker{margin-bottom:5px;color:#536176;text-transform:uppercase;font-size:.84rem;font-weight:800;letter-spacing:.075em}
.page-description,.surface-description,.muted{color:var(--muted)}
.page-description{max-width:900px;font-size:1.05rem;margin-bottom:0}
.page-actions,.export-group{display:flex;gap:9px;align-items:center;flex-wrap:wrap}

.surface{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin-bottom:20px}
.flush-surface{padding:0;overflow:hidden}
.surface-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:17px}
.surface-heading h2{margin-bottom:0}.surface-heading>span{color:var(--muted);font-size:.92rem}
.summary-strip{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));background:#fff;border:1px solid var(--border);border-radius:var(--radius);margin-bottom:20px;overflow:hidden}
.summary-strip>div{display:grid;gap:4px;padding:18px 20px;border-right:1px solid var(--border)}
.summary-strip>div:last-child{border-right:0}.summary-strip span{font-size:.85rem;color:var(--muted);font-weight:700}.summary-strip strong{font-size:1.5rem;line-height:1.15}
.dashboard-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(360px,.65fr);gap:20px;align-items:start}
.split-workspace{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(340px,.65fr);gap:20px;align-items:start}
.workspace-editor{position:sticky;top:calc(var(--topbar) + 20px)}
.constraint-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(340px,.55fr);gap:20px;align-items:start}

.notice{display:flex;align-items:center;justify-content:space-between;gap:24px;border:1px solid var(--border);border-left:4px solid var(--accent);background:#fff;padding:18px 20px;border-radius:8px;margin-bottom:20px}
.notice p{margin:4px 0 0;color:var(--muted)}
.notice-primary{background:#f7fbff;border-color:#b9d8fb;border-left-color:var(--accent)}
.notice-success{background:var(--success-soft);border-color:#b8dec8;border-left-color:var(--success)}
.alert{border:1px solid;padding:13px 15px;border-radius:7px;margin:0 0 20px;font-weight:700}
.alert-error{background:var(--danger-soft);border-color:#edc0bc;color:#8f2018}.alert-success{background:var(--success-soft);border-color:#b9dec8;color:#125d33}.alert-warning{background:var(--warning-soft);border-color:#ead49c;color:#704b00}.alert-info{background:var(--accent-soft);border-color:#bdd9fa;color:#0754a8}
.status{display:inline-flex;align-items:center;width:max-content;max-width:100%;min-height:28px;border-radius:5px;padding:4px 8px;font-size:.78rem;font-weight:800;line-height:1.2}
.status-success{background:var(--success-soft);color:var(--success)}.status-warning{background:var(--warning-soft);color:var(--warning)}.status-danger{background:var(--danger-soft);color:var(--danger)}.status-neutral{background:var(--surface-strong);color:#475569}
.count-chip{display:inline-flex;align-items:center;justify-content:center;min-width:34px;height:30px;border-radius:5px;background:var(--surface-strong);font-size:.86rem;font-weight:800}

/* Setup flow */
.progress-copy{display:grid;text-align:right}.progress-copy strong{font-size:1.2rem}.progress-copy span{font-size:.8rem;color:var(--muted)}
.progress-native{width:100%;height:9px;display:block;margin:2px 0 18px;appearance:none;border:0;background:#e7ebf0;border-radius:2px;overflow:hidden}
.progress-native::-webkit-progress-bar{background:#e7ebf0}.progress-native::-webkit-progress-value{background:var(--accent)}.progress-native::-moz-progress-bar{background:var(--accent)}
.setup-list{list-style:none;padding:0;margin:0;display:grid;border-top:1px solid var(--border)}
.setup-item{display:grid;grid-template-columns:38px minmax(0,1fr) auto;align-items:center;gap:13px;min-height:72px;padding:11px 2px;border-bottom:1px solid var(--border)}
.step-index{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;border:1px solid var(--border-strong);font-weight:800;color:#475569;background:#fff}
.setup-item.is-done .step-index{background:var(--success-soft);border-color:#a9d7bc;color:var(--success)}
.step-copy{display:grid;gap:2px}.step-copy strong{font-size:1rem}.step-copy span{font-size:.9rem;color:var(--muted)}
.setup-item>a{color:#075fbe;font-weight:800;text-decoration:none}.setup-item>a:hover{text-decoration:underline}
.issue-stack{display:grid;border-top:1px solid var(--border)}
.issue-row{display:grid;grid-template-columns:7px minmax(0,1fr) auto;align-items:center;gap:12px;min-height:62px;padding:10px 2px;border-bottom:1px solid var(--border);text-decoration:none}
.issue-row:hover strong{color:var(--accent)}.issue-row>span:nth-child(2){display:grid;gap:2px}.issue-row small{color:var(--muted);font-size:.88rem}.issue-marker{width:7px;height:28px;border-radius:2px;background:#94a3b8}.issue-marker.warning{background:#d39a22}.issue-marker.danger{background:var(--danger)}.row-arrow{font-size:1.6rem;color:#8490a1}
.empty-compact{display:grid;gap:4px;padding:8px 0}.empty-compact span{color:var(--muted)}

/* Tables */
.list-toolbar{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 16px;border-bottom:1px solid var(--border);background:#fff}.list-toolbar>span{font-size:.88rem;color:var(--muted);font-weight:700;white-space:nowrap}
.search-field{display:block;width:min(100%,430px)}.search-field input{background:#f8fafc}
.responsive-table,.table-wrap,.availability-table-wrap,.schedule-desktop{width:100%;overflow:auto;-webkit-overflow-scrolling:touch;scrollbar-width:thin}
.responsive-table:focus-visible,.availability-table-wrap:focus-visible,.schedule-desktop:focus-visible{outline-offset:-3px}
.data-table,.availability-table,.schedule-table{width:100%;border-collapse:collapse;background:#fff;color:var(--text)}
.data-table{min-width:760px}.data-table th,.data-table td{padding:14px 15px;border-bottom:1px solid var(--border);text-align:left;vertical-align:middle}
.data-table thead th{position:sticky;top:0;z-index:2;background:#f3f6f9;color:#475569;font-size:.84rem;text-transform:uppercase;letter-spacing:.035em;font-weight:800;white-space:nowrap}
.data-table tbody tr:hover{background:#fbfcfe}.data-table tbody tr:last-child td{border-bottom:0}
.data-table td{font-size:1rem}.data-table td:first-child{font-size:1rem}.cell-note{display:block;color:var(--muted);font-size:.86rem;font-weight:400;margin-top:3px}.cell-action{text-align:right!important;white-space:nowrap}

/* Tabs and compact selectors */
.filter-tabs,.segmented{display:flex;align-items:center;gap:4px;width:max-content;max-width:100%;overflow:auto;padding:3px;background:#e9edf2;border-radius:7px;margin-bottom:18px}
.filter-tab,.segmented a{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:7px 13px;border-radius:5px;text-decoration:none;color:#4b586b;font-weight:800;font-size:.9rem;white-space:nowrap}
.filter-tab:hover,.segmented a:hover{color:#111827;background:#f5f7fa}.filter-tab.is-active,.segmented a.is-active{background:#fff;color:#111827;border:1px solid #ccd3dd}
.quick-select{display:flex;align-items:end;gap:10px}.quick-select label{min-width:220px}.quick-select select{min-width:210px}

/* Class & assignment */
.class-summary-bar{display:flex;align-items:center;justify-content:space-between;gap:18px;background:#172033;color:#fff;border-radius:8px;padding:17px 20px;margin-bottom:20px}
.class-summary-bar>div:first-child{display:grid}.class-summary-bar>div:first-child strong{color:#fff;font-size:1.15rem}.class-summary-bar>div:first-child span{color:#bcc7d6;font-size:.86rem}
.class-hours{display:flex;align-items:center;gap:18px;flex-wrap:wrap}.class-hours span{font-size:.88rem;color:#ccd5e1}.class-hours strong{color:#fff}.class-hours .is-ok{color:#9ee4b8;font-weight:800}.class-hours .is-warn{color:#ffd37b;font-weight:800}
.class-choice-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.class-choice-grid label{display:flex;align-items:center;gap:7px;min-height:40px;padding:7px 9px;border:1px solid var(--border);border-radius:6px;background:#fff;font-weight:700}.class-choice-grid label:has(input:checked){border-color:#7bb4f0;background:#eef6ff}
.info-panel{border-left:4px solid #7b8798;background:#fff;border-top:1px solid var(--border);border-right:1px solid var(--border);border-bottom:1px solid var(--border);border-radius:7px;padding:15px 17px;margin:16px 0}.info-panel p{margin:4px 0;color:var(--muted)}.info-panel a{color:#075fbe;font-weight:800}.compact-info{margin-bottom:0}
.editor-disclosure{border:0}.editor-disclosure summary{cursor:pointer;font-weight:800;min-height:44px;display:flex;align-items:center;color:#075fbe;width:max-content}.editor-disclosure summary:hover{text-decoration:underline}

/* Constraints */
.constraint-select{margin-bottom:17px}.teacher-constraint-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:13px 14px;background:#f5f7fa;border:1px solid var(--border);border-radius:7px;margin-bottom:16px}.teacher-constraint-head>div{display:grid}.teacher-constraint-head span{font-size:.88rem;color:var(--muted)}
.availability-table{min-width:760px}.availability-table th,.availability-table td{border:1px solid var(--border);padding:9px;text-align:center}.availability-table thead th{background:#f3f6f9;font-size:.82rem}.availability-table tbody th{text-align:left;background:#fafbfc;white-space:nowrap}
.slot-checkbox{display:grid;place-items:center;cursor:pointer;min-height:35px}.slot-checkbox input{position:absolute;opacity:0;pointer-events:none}.slot-checkbox>span[aria-hidden="true"]{width:28px;height:28px;border:1px solid var(--border-strong);border-radius:5px;background:#fff;position:relative}.slot-checkbox input:checked+span{background:var(--accent);border-color:var(--accent)}.slot-checkbox input:checked+span::after{content:"✓";position:absolute;inset:0;display:grid;place-items:center;color:#fff;font-size:.9rem;font-weight:900}.slot-checkbox input:focus-visible+span{outline:3px solid var(--focus);outline-offset:2px}
.period9-stack{display:grid;gap:12px}.period9-form{border:1px solid var(--border);border-radius:7px;padding:14px}.period9-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:11px}.period9-head>div{display:grid}.period9-head>div span,.period9-head>span{font-size:.84rem;color:var(--muted)}.weekday-checks{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}.weekday-checks label{cursor:pointer}.weekday-checks input{position:absolute;opacity:0}.weekday-checks span{display:grid;place-items:center;min-width:48px;min-height:38px;border:1px solid var(--border);border-radius:6px;background:#fff;font-size:.88rem;font-weight:800}.weekday-checks input:checked+span{background:#eaf3ff;border-color:#75aee9;color:#0756ac}.weekday-checks input:focus-visible+span{outline:3px solid var(--focus);outline-offset:2px}

/* Program */
.program-status-bar{display:grid;grid-template-columns:repeat(4,minmax(0,1fr)) auto;align-items:center;background:#fff;border:1px solid var(--border);border-radius:8px;margin-bottom:20px;overflow:hidden}.program-status-bar>div{display:grid;gap:3px;padding:15px 17px;border-right:1px solid var(--border)}.program-status-bar>div span{font-size:.8rem;color:var(--muted);font-weight:700}.program-status-bar>div strong{font-size:1rem}.program-status-bar>form{padding:11px 14px}
.diagnosis-list{display:grid;border-top:1px solid var(--border)}.diagnosis-list>div{display:grid;grid-template-columns:30px minmax(0,1fr);gap:10px;align-items:start;padding:12px 0;border-bottom:1px solid var(--border)}.diagnosis-list>div>span{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--warning-soft);color:var(--warning);font-weight:900}.diagnosis-list p{margin:2px 0 0}
.schedule-surface{padding:0;overflow:hidden}.schedule-toolbar{display:flex;align-items:end;gap:12px;justify-content:space-between;padding:14px 16px;border-bottom:1px solid var(--border);background:#fff;flex-wrap:wrap}.schedule-toolbar .segmented{margin:0}.export-group{margin-left:auto}
.schedule-table{min-width:1120px;table-layout:fixed}.schedule-table th,.schedule-table td{border-right:1px solid var(--border);border-bottom:1px solid var(--border);padding:9px;vertical-align:top}.schedule-table thead th{position:sticky;top:0;z-index:4;background:#eef2f6;font-size:.83rem;text-align:left}.schedule-table thead th:first-child{width:178px;left:0;z-index:5}.schedule-table tbody th{position:sticky;left:0;z-index:3;background:#f8fafc;width:178px;font-size:.78rem;text-align:left;color:#526176;white-space:normal}.schedule-table td{height:88px;background:#fff}.lesson-block{min-height:67px;border-left:4px solid #2079d5;background:#f2f7fd;padding:8px 9px;display:grid;align-content:start;gap:2px;border-radius:4px}.lesson-block strong{font-size:.9rem;line-height:1.25}.lesson-block span{font-size:.82rem;color:#475569;line-height:1.3}.lesson-block small{font-size:.74rem;color:#6b7789;margin-top:2px}.empty-slot{font-size:.8rem;color:#9aa4b2}
.schedule-mobile{display:none}.day-tabs{display:flex;gap:5px;overflow:auto;padding:10px;background:#eef2f6;position:sticky;top:var(--topbar);z-index:5}.day-tab{flex:1;min-width:58px;height:42px;border:1px solid transparent;border-radius:6px;background:transparent;font-weight:800;cursor:pointer}.day-tab.is-active{background:#fff;border-color:var(--border-strong);color:#075bb5}.day-panel{padding:15px}.day-panel h3{font-size:1.2rem;margin:0 0 12px}.mobile-lesson-list{display:grid;border-top:1px solid var(--border)}.mobile-lesson{display:grid;grid-template-columns:116px minmax(0,1fr);gap:14px;align-items:center;min-height:78px;border-bottom:1px solid var(--border);padding:10px 2px}.mobile-lesson.is-empty{color:#8b96a5}.mobile-period,.mobile-lesson-content{display:grid;gap:2px}.mobile-period strong{font-size:.89rem}.mobile-period span{font-size:.76rem;color:var(--muted)}.mobile-lesson-content strong{font-size:1rem}.mobile-lesson-content span{font-size:.91rem;color:var(--muted)}

/* Teacher */
.teacher-hero{display:flex;align-items:flex-end;justify-content:space-between;gap:22px;background:#172033;color:#fff;padding:28px;border-radius:9px;margin-bottom:20px}.teacher-hero h1{color:#fff;margin-bottom:6px}.teacher-hero>div:first-child>p:last-child{margin:0;color:#c6cfdb}.teacher-hero .section-kicker{color:#a9c9ee}.teacher-day-count{display:grid;text-align:right}.teacher-day-count strong{color:#fff;font-size:2.2rem;line-height:1}.teacher-day-count span{color:#c6cfdb;font-size:.85rem;margin-top:5px}
.today-list{display:grid;border-top:1px solid var(--border)}.today-row{display:grid;grid-template-columns:170px minmax(0,1fr);gap:18px;align-items:center;min-height:72px;padding:10px 2px;border-bottom:1px solid var(--border)}.today-row.is-empty{opacity:.67}.today-time,.today-row>div:last-child{display:grid;gap:2px}.today-time span,.today-row>div:last-child span{color:var(--muted);font-size:.9rem}.today-row>div:last-child strong{font-size:1.02rem}
.teacher-bottom-nav{display:none}

/* Users */
.user-workspace .workspace-editor{max-width:460px}.user-workspace .data-table{min-width:900px}

/* Empty */
.empty-state{display:grid;gap:7px;justify-items:start;padding:30px}.empty-state strong{font-size:1.12rem}.empty-state span{color:var(--muted)}.large-empty{background:#fff;border:1px solid var(--border);border-radius:9px;padding:44px;margin-bottom:20px}.large-empty .button{margin-top:9px}

/* Printing */
.print-page{background:#edf0f4;padding:24px}.print-sheet{max-width:1320px;margin:0 auto;background:#fff;border:1px solid var(--border);padding:28px}.print-toolbar{display:flex;gap:10px;margin-bottom:24px}.export-table{min-width:1000px}

/* Tablet */
@media(max-width:1180px){
  :root{--sidebar:238px}
  .summary-strip{grid-template-columns:repeat(3,minmax(0,1fr))}.summary-strip>div:nth-child(3){border-right:0}.summary-strip>div:nth-child(-n+3){border-bottom:1px solid var(--border)}
  .dashboard-grid,.constraint-grid{grid-template-columns:1fr}
  .split-workspace{grid-template-columns:minmax(0,1.3fr) minmax(310px,.7fr)}
  .class-choice-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .program-status-bar{grid-template-columns:repeat(2,minmax(0,1fr))}.program-status-bar>div:nth-child(2n){border-right:0}.program-status-bar>form{grid-column:1/-1;border-top:1px solid var(--border)}
}

/* Mobile / narrow tablet */
@media(max-width:900px){
  :root{--topbar:68px}
  .app-shell{display:block}.sidebar{position:fixed;left:0;top:0;width:min(88vw,320px);height:100dvh;transform:translateX(-103%);transition:transform .18s ease;box-shadow:none}.sidebar.is-open{transform:translateX(0)}
  .menu-button{display:block}.topbar{height:var(--topbar);padding:0 14px}.account-copy{display:none}.account-area{gap:6px}.topbar-title span{display:none}
  .content{padding:24px 14px 86px}.page-header-split{display:grid;align-items:start}.page-actions{width:100%}.page-actions .button{flex:1}
  .split-workspace{grid-template-columns:1fr}.workspace-editor{position:static}.assignment-workspace .workspace-editor{order:-1}
  .surface{padding:18px}.flush-surface{padding:0}.summary-strip{grid-template-columns:repeat(2,minmax(0,1fr))}.summary-strip>div{border-right:1px solid var(--border);border-bottom:1px solid var(--border)}.summary-strip>div:nth-child(2n){border-right:0}.summary-strip>div:last-child{grid-column:1/-1;border-bottom:0;border-right:0}
  .notice{align-items:flex-start;display:grid}.notice form,.notice .button{width:100%}
  .quick-select{width:100%}.quick-select label,.quick-select select{width:100%;min-width:0}
  .class-summary-bar{align-items:flex-start;display:grid}.class-hours{gap:10px 16px}
  .form-grid,.two-fields{grid-template-columns:1fr}.span-2{grid-column:auto}.class-choice-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .schedule-desktop{display:none}.schedule-mobile{display:block}.schedule-toolbar{align-items:stretch}.schedule-toolbar>*{width:100%}.schedule-toolbar .segmented{width:100%}.schedule-toolbar .segmented a{flex:1}.export-group{margin-left:0}.export-group .button{flex:1}
  .teacher-bottom-nav{position:fixed;display:grid;grid-template-columns:repeat(3,1fr);left:0;right:0;bottom:0;z-index:25;background:#fff;border-top:1px solid var(--border);padding:max(8px,env(safe-area-inset-bottom)) 10px max(8px,env(safe-area-inset-bottom));gap:5px}.teacher-bottom-nav a{min-height:46px;display:grid;place-items:center;text-decoration:none;font-weight:800;font-size:.95rem;border-radius:6px}.teacher-bottom-nav a:hover{background:#f1f4f8}
  #bugun,#haftalik,#ciktilar{scroll-margin-top:82px;scroll-margin-bottom:90px}
}

@media(max-width:640px){
  html{font-size:16px}.auth-shell,.login-shell{display:block;max-width:none;border:0;background:#fff}.auth-intro{min-height:auto;padding:28px 20px 34px;border:0;border-bottom:1px solid var(--border)}.auth-message{padding:58px 0 0}.auth-message h1{font-size:2.45rem}.auth-message>p:last-child{font-size:1rem}.auth-card,.login-card{width:100%;border:0;border-radius:0;padding:30px 20px;margin:0}
  .content{padding-left:12px;padding-right:12px}.page-header{margin-bottom:20px}.page-header h1{font-size:1.8rem}.page-description{font-size:1rem}
  .surface{padding:16px;border-radius:8px;margin-bottom:14px}.flush-surface{padding:0}.surface-heading{display:grid;gap:8px}
  .summary-strip{margin-bottom:14px}.summary-strip>div{padding:15px}.summary-strip strong{font-size:1.28rem}
  .setup-item{grid-template-columns:34px minmax(0,1fr);padding:12px 0}.setup-item>a{grid-column:2;margin-top:2px}
  .class-choice-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.class-choice-grid label{justify-content:center}
  .filter-tabs{width:100%}.filter-tab{flex:1}
  .responsive-table{border:1px solid var(--border);border-radius:6px}.data-table{min-width:720px}.data-table th,.data-table td{padding:13px 12px;font-size:1rem}
  .teacher-hero{padding:21px 18px;align-items:flex-start}.teacher-day-count strong{font-size:1.8rem}.today-row{grid-template-columns:112px minmax(0,1fr);gap:12px}.today-time span{font-size:.82rem}
  .mobile-lesson{grid-template-columns:105px minmax(0,1fr)}.mobile-period span{font-size:.8rem}
  .program-status-bar{grid-template-columns:1fr}.program-status-bar>div{border-right:0;border-bottom:1px solid var(--border)}.program-status-bar>div:last-of-type{border-bottom:0}
  .period9-head{align-items:flex-start}.weekday-checks{display:grid;grid-template-columns:repeat(5,1fr)}.weekday-checks span{min-width:0;width:100%}
  .print-page{padding:0}.print-sheet{border:0;padding:14px}
}

@media(max-width:420px){
  .class-choice-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.brand-lockup strong{font-size:1rem}.auth-message h1{font-size:2.15rem}.summary-strip span{font-size:.79rem}.summary-strip strong{font-size:1.16rem}.button,.btn{white-space:normal;text-align:center}.page-actions{display:grid;grid-template-columns:1fr}
}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}

@media print{
  @page{size:A4 landscape;margin:10mm}
  .print-page{background:#fff;padding:0}.print-sheet{max-width:none;border:0;padding:0}.print-toolbar{display:none}.print-sheet h1{font-size:18pt}.print-sheet p{font-size:10pt}
  .table-wrap,.responsive-table{overflow:visible;border:0}.export-table,.schedule-table{min-width:100%;font-size:8.5pt}.schedule-table th,.schedule-table td{padding:5px;height:auto}.lesson-block{background:#fff;border-left:2px solid #000;padding:3px;min-height:0}
}

/* V0.4 final refinements */
.cell-rule{display:block;font-size:.88rem}.cell-muted{color:var(--muted);font-size:.9rem}.editor-disclosure{border:1px solid var(--border);border-radius:8px;padding:0 14px}.editor-disclosure[open]{padding-bottom:14px}.editor-disclosure summary{width:100%;justify-content:space-between}.editor-disclosure summary::after{content:"+";color:var(--muted);font-size:1.1rem}.editor-disclosure[open] summary::after{content:"−"}.editor-disclosure .availability-table-wrap{margin-top:10px}.empty-compact{display:grid;gap:4px;padding:16px 0;color:var(--muted)}.empty-compact strong{color:var(--text-strong)}