:root{--color-bg: #f5f5f5;--color-surface: #ffffff;--color-primary: #667eea;--color-primary-dark: #5a6fd6;--color-text: #1a1a2e;--color-text-muted: #6b7280;--color-border: #e5e7eb;--navbar-height: 56px;--sidebar-width: 220px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--color-bg);color:var(--color-text);-webkit-font-smoothing:antialiased}.app-shell{min-height:100vh;display:flex;flex-direction:column}.app-body{display:flex;flex:1;margin-top:var(--navbar-height)}.app-content{flex:1;padding:2rem;margin-left:var(--sidebar-width)}.navbar{position:fixed;top:0;left:0;right:0;height:var(--navbar-height);background:var(--color-primary);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 1.5rem;z-index:100}.navbar-brand{display:flex;align-items:center;gap:.75rem;font-weight:600;font-size:1.1rem}.navbar-logo{height:28px;opacity:.9}.navbar-logout{background:#ffffff26;border:1px solid rgba(255,255,255,.25);color:#fff;padding:.4rem 1rem;border-radius:6px;cursor:pointer;font-size:.85rem;transition:background .2s}.navbar-logout:hover{background:#ffffff40}.sidebar{position:fixed;top:var(--navbar-height);left:0;bottom:0;width:var(--sidebar-width);background:var(--color-surface);border-right:1px solid var(--color-border);padding:1rem 0;overflow-y:auto}.sidebar-link{display:block;padding:.65rem 1.5rem;color:var(--color-text-muted);text-decoration:none;font-size:.9rem;transition:all .15s}.sidebar-link:hover{color:var(--color-text);background:var(--color-bg)}.sidebar-link.active{color:var(--color-primary);font-weight:500;background:#667eea14;border-right:3px solid var(--color-primary)}.placeholder-page{display:flex;flex-direction:column;align-items:center;justify-content:center;height:60vh;color:var(--color-text-muted)}.placeholder-page h2{font-size:1.5rem;color:var(--color-text);margin-bottom:.5rem}.login-container{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2)}.login-card{background:#fff;border-radius:12px;padding:2.5rem;width:100%;max-width:380px;text-align:center;box-shadow:0 20px 60px #00000026}.login-logo{height:48px;margin-bottom:1rem;filter:brightness(0) saturate(100%) invert(45%) sepia(70%) saturate(700%) hue-rotate(200deg)}.login-card h1{font-size:1.3rem;font-weight:600;margin-bottom:1.5rem;color:var(--color-text)}.login-card label{display:block;text-align:left;font-size:.85rem;font-weight:500;color:var(--color-text-muted);margin-bottom:.4rem}.login-card input{width:100%;padding:.65rem .85rem;border:1px solid var(--color-border);border-radius:8px;font-size:.95rem;margin-bottom:1rem;outline:none;transition:border-color .2s}.login-card input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #667eea26}.login-card button[type=submit]{width:100%;padding:.7rem;background:var(--color-primary);color:#fff;border:none;border-radius:8px;font-size:.95rem;font-weight:500;cursor:pointer;transition:background .2s}.login-card button[type=submit]:hover{background:var(--color-primary-dark)}.login-card button[type=submit]:disabled{opacity:.6;cursor:not-allowed}.link-btn{background:none;border:none;color:var(--color-primary);cursor:pointer;font-size:.85rem;margin-top:.75rem}.link-btn:hover{text-decoration:underline}.otp-hint{font-size:.85rem;color:var(--color-text-muted);margin-bottom:1rem}.error{color:#dc2626;font-size:.85rem;margin-top:1rem}