.app-shell{display:grid;grid-template-columns:240px 1fr;min-height:100vh}.app-sidebar{background:var(--color-white);border-right:1px solid var(--color-border);padding:24px 16px;display:flex;flex-direction:column}.app-brand{margin:0 0 20px;color:var(--color-primary);font-size:20px}.app-user{margin:-12px 0 16px;color:var(--color-muted);font-size:13px}.app-nav{display:flex;flex-direction:column;gap:6px}.app-nav-link{padding:10px 12px;border-radius:10px;color:var(--color-muted)}.app-nav-link-active{background:var(--color-primary-soft);color:var(--color-primary);font-weight:600}.app-main{padding:24px}.app-logout{margin-top:auto;border:1px solid var(--color-border);background:var(--color-white);border-radius:8px;padding:10px;cursor:pointer}.page-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:20px}.page-header h2{margin:0;font-size:24px}.page-header p{margin:6px 0 0;color:var(--color-muted)}.primary-button{border:0;border-radius:10px;padding:10px 14px;background:var(--color-primary);color:var(--color-white);cursor:pointer}.primary-button:disabled{opacity:.65;cursor:not-allowed}.class-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}.class-card{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:14px;display:flex;flex-direction:column;gap:8px}.class-card strong{color:var(--color-primary)}.class-card span{color:var(--color-muted);font-size:14px}.page-wrap{display:flex;flex-direction:column;gap:16px}.kpi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}.panel-box{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:16px}.panel-box p{margin:0;color:var(--color-muted)}.invite-accept-page{max-width:620px;margin:40px auto}.status-line{margin:0;color:var(--color-muted);font-size:14px}.status-line-error{color:#b42318}.login-page{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:min(520px,100%);background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px;display:flex;flex-direction:column;gap:14px}.login-card h1{margin:0;color:var(--color-primary)}.login-card p{margin:0;color:var(--color-muted)}.login-provider-card{display:flex;flex-direction:column;gap:8px;padding:12px;border:1px solid var(--color-border);border-radius:10px}.login-provider-card h2{margin:0;font-size:16px;color:var(--color-primary)}.login-provider-card button{border:0;border-radius:8px;background:var(--color-primary);color:var(--color-white);padding:10px;cursor:pointer}.login-provider-card button:disabled{opacity:.7;cursor:not-allowed}.google-login-slot{min-height:44px}.login-hint{margin:0;color:var(--color-muted);font-size:13px}.login-error{margin:0;color:#b42318}.info-card{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:14px 16px;display:flex;flex-direction:column;gap:6px}.info-card span{color:var(--color-muted);font-size:13px}.info-card strong{font-size:22px;color:var(--color-primary)}.table-shell{border:1px solid var(--color-border);border-radius:var(--radius-md);overflow:hidden;background:var(--color-white)}.data-table{width:100%;border-collapse:collapse}.data-table th,.data-table td{text-align:left;padding:12px;border-bottom:1px solid var(--color-border)}.data-table th{color:var(--color-muted);font-weight:600;font-size:13px}.invite-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}.invite-card{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:14px;display:flex;flex-direction:column;gap:6px}.invite-card strong{color:var(--color-primary)}.invite-card span{color:var(--color-muted);font-size:13px}:root{--color-primary: #5d5fef;--color-primary-soft: #ececff;--color-white: #ffffff;--color-text: #1f2340;--color-muted: #667085;--color-border: #dcdff5;--color-surface: #f7f8ff;--radius-md: 12px}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--color-surface);color:var(--color-text)}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.app-loading{padding:24px;color:var(--color-muted)}