:root{--bg:#0b0d1a;--card-bg:#13162a;--primary:#6c3fe8;--secondary:#4f8ef7;--text-main:#fff;--text-muted:#a0a8c0;--border:#1e2240;--success:#2ecc71;--error:#e74c3c;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,Segoe UI,system-ui,sans-serif}*{box-sizing:border-box}html,body,#app{min-height:100%;margin:0}body{background:radial-gradient(circle at 10% -20%, #4f8ef738, transparent 45%), radial-gradient(circle at 100% 0%, #6c3fe840, transparent 38%), var(--bg);color:var(--text-main)}input,select,button{font:inherit}.page-shell{place-items:center;min-height:100vh;padding:16px;display:grid}.session-card{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;width:min(100%,560px);padding:16px;box-shadow:0 14px 36px #00000061}.brand{color:var(--primary);letter-spacing:.12em;text-transform:uppercase;margin:0 0 8px;font-size:.82rem;font-weight:700}h1{margin:0 0 18px;font-size:1.8rem;line-height:1.12}.form-grid{gap:14px;display:grid}.field{gap:8px;display:grid}.field span{color:var(--text-muted);font-size:.88rem;font-weight:600}.field input,.field select{border:1px solid var(--border);width:100%;color:var(--text-main);background:#0f1224;border-radius:12px;min-height:52px;padding:12px 14px}.field input::placeholder{color:var(--text-muted)}.field input:focus,.field select:focus{border-color:var(--secondary);outline:none;box-shadow:0 0 0 3px #4f8ef72e}.people-list{gap:10px;display:grid}.person-row{grid-template-columns:1fr auto;gap:8px;display:grid}.icon-button{border:1px solid var(--border);cursor:pointer;width:52px;min-height:52px;color:var(--text-main);background:#11152c;border-radius:12px;font-size:1.4rem;font-weight:700}.icon-button.add{background:#4f8ef73d;border-color:#4f8ef78c}.icon-button.remove{background:#e74c3c33;border-color:#e74c3c8c}.primary-button{color:#fff;letter-spacing:.08em;cursor:pointer;border:0;border-radius:12px;width:100%;min-height:58px;margin-top:18px;font-size:1.05rem;font-weight:800;transition:transform .12s,opacity .2s}.primary-button.start{background:linear-gradient(135deg, var(--primary), #7f5df7);box-shadow:0 0 0 1px #6c3fe880,0 0 26px #6c3fe866}.primary-button.end{background:linear-gradient(135deg, #d63e33, var(--error))}.primary-button:active{transform:translateY(1px)}.primary-button:disabled{opacity:.65;cursor:not-allowed}.time-note{color:var(--text-muted);margin:10px 0 0;font-size:.9rem}.alert{border:1px solid;border-radius:12px;margin-top:12px;padding:11px 12px;font-size:.94rem;font-weight:600}.alert.success{color:var(--success);background:#2ecc711f;border-color:#2ecc7159}.done-box{box-shadow:0 0 0 1px #2ecc7140,0 0 24px #2ecc712e}.alert.error{color:var(--error);background:#e74c3c1f;border-color:#e74c3c59}@media (width>=768px){.page-shell,.session-card{padding:24px}h1{font-size:2rem}}