.signin-container{min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;padding:20px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif}.signin-card{background:white;border-radius:20px;box-shadow:0 20px 40px rgba(0,0,0,.15);padding:40px;width:100%;max-width:420px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.header{text-align:center;margin-bottom:30px}.logo{display:inline-flex;align-items:center;justify-content:center;width:60px;height:60px;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:16px;color:white;margin-bottom:20px}.header h1{font-size:28px;font-weight:700;color:#1a1a1a;margin:0 0 8px}.header p{color:#6b7280;font-size:16px;margin:0}.signin-form{gap:20px}.form-group,.signin-form{display:flex;flex-direction:column}.form-group{gap:8px}.form-group label{font-weight:600;color:#374151;font-size:14px}.form-group input{padding:14px 16px;border:2px solid #e5e7eb;border-radius:12px;font-size:16px;transition:all .2s ease;background:#fafafa}.form-group input:focus{outline:none;border-color:#667eea;background:white;box-shadow:0 0 0 3px rgba(102,126,234,.1)}.form-group input::placeholder{color:#9ca3af}.submit-button{background:linear-gradient(135deg,#667eea,#764ba2);color:white;border:none;padding:16px;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;transition:all .2s ease;margin-top:10px}.submit-button:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 25px rgba(102,126,234,.3)}.submit-button:disabled{opacity:.6;cursor:not-allowed;transform:none}.success-message{background:#d1fae5;border:1px solid #a7f3d0;color:#065f46;border-radius:8px}.error-message,.success-message{padding:12px 16px;font-size:14px;margin-bottom:10px}.error-message{background:#fee2e2;border:1px solid #fecaca;color:#dc2626;border-radius:8px}.signup-link{text-align:center;color:#6b7280;font-size:14px;margin-top:20px}.signup-link a{color:#667eea;text-decoration:none;font-weight:600}.signup-link a:hover{text-decoration:underline}@media (max-width:480px){.signin-container{padding:10px}.signin-card{padding:30px 20px}.header h1{font-size:24px}}