:root{color-scheme:light;--primary: #1d4ed8;--primary-dark: #1e3a8a;--primary-soft: #dbeafe;--success: #16a34a;--success-soft: #dcfce7;--warning: #f59e0b;--warning-soft: #fef3c7;--error: #dc2626;--error-soft: #fee2e2;--background: #f8fafc;--surface: #ffffff;--surface-soft: #f8fbff;--border: #e2e8f0;--text: #0f172a;--text-muted: #475569;--text-soft: #64748b;--shadow: 0 1px 2px rgba(15, 23, 42, .04);--focus: 0 0 0 3px rgba(29, 78, 216, .15);--radius-card: 16px;--radius-button: 12px;--radius-input: 12px}*{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;font-family:Inter,system-ui,sans-serif;background:var(--background);color:var(--text)}button,input,select,a{font:inherit}button{cursor:pointer}a{color:var(--primary-dark)}.app-shell{min-height:100vh;padding:20px 16px 40px}.app-frame{width:min(100%,860px);margin:0 auto;display:flex;flex-direction:column;gap:16px}.auth-frame{width:min(100%,440px);padding-top:48px}.brand-block,.panel,.session-card,.group-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow)}.brand-block,.panel,.group-card{padding:20px}.brand-block{display:flex;gap:16px;align-items:flex-start}.brand-mark{width:44px;height:44px;border-radius:14px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;font-weight:800;letter-spacing:-.03em;flex:0 0 auto}.eyebrow,.field-label,.session-label{color:var(--text-soft);font-size:12px;font-weight:600;letter-spacing:.04em;text-transform:uppercase}.page-title{margin:4px 0 0;font-size:28px;line-height:1.1;font-weight:600;letter-spacing:-.03em}.section-title,.card-title{margin:0;font-size:20px;line-height:1.2;font-weight:600;letter-spacing:-.02em}.card-title{font-size:18px}.body-copy,.helper-copy,.card-meta,.group-details{margin:8px 0 0;color:var(--text-muted);font-size:16px;line-height:1.5}.helper-copy,.card-meta,.group-details{font-size:14px}.top-bar{display:flex;flex-direction:column;gap:16px}.session-card{padding:16px;display:flex;flex-direction:column;gap:10px}.session-email{font-weight:600}.panel-header{margin-bottom:16px}.panel-header-row{display:flex;align-items:center;justify-content:space-between;gap:12px}.inline-grid,.form-stack,.group-list,.status-actions{display:flex;flex-direction:column;gap:12px}.field-block{display:flex;flex-direction:column;gap:8px}.text-input{width:100%;min-height:48px;padding:12px 14px;border:1px solid var(--border);border-radius:var(--radius-input);background:var(--surface);color:var(--text)}.text-input:focus{outline:none;border-color:var(--primary);box-shadow:var(--focus)}.primary-button,.secondary-button{min-height:48px;padding:12px 16px;border-radius:var(--radius-button);border:1px solid transparent;transition:background-color .14s ease,border-color .14s ease,color .14s ease}.primary-button{background:var(--primary);color:#fff}.primary-button:hover{background:var(--primary-dark)}.secondary-button{background:var(--surface);color:var(--text);border-color:var(--border)}.secondary-button:hover{border-color:var(--primary);color:var(--primary-dark)}.primary-button:disabled,.secondary-button:disabled{opacity:.6;cursor:default}.compact-button{min-height:40px;padding:8px 12px}.active-button{border-color:var(--primary);background:var(--primary-soft);color:var(--primary-dark)}.count-chip,.status-badge{display:inline-flex;align-items:center;justify-content:center;min-height:32px;padding:6px 10px;border-radius:999px;font-size:13px;font-weight:600}.count-chip{background:var(--surface-soft);color:var(--text-soft)}.status-badge{border:1px solid var(--border)}.status-available{background:var(--success-soft);color:var(--success);border-color:#16a34a26}.status-occupied{background:var(--warning-soft);color:#92400e;border-color:#f59e0b2e}.status-retired{background:#f1f5f9;color:var(--text-soft)}.error-copy{margin:0;padding:12px 14px;border-radius:12px;background:var(--error-soft);color:var(--error);font-size:14px}.success-copy{margin:0;padding:12px 14px;border-radius:12px;background:var(--success-soft);color:var(--success);font-size:14px}.group-card{display:flex;flex-direction:column;gap:14px}.group-card-top{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.group-link{word-break:break-all}.group-details{display:flex;flex-direction:column;gap:4px}@media (min-width: 720px){.app-shell{padding:32px 24px 48px}.top-bar{flex-direction:row;justify-content:space-between;align-items:flex-start}.session-card{min-width:220px}.inline-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.status-actions{flex-direction:row;flex-wrap:wrap}}